How to Program Honeywell T4 Pro thermostats

This digital thermostat has 7-day, 5-2, and 5-1-1 programmable options or a non-programmable option so you can vary the settings depending on your schedule.
After powering up the thermostat, the first step is setting the year. Press the Select button to awaken the screen, then press the Plus or Minus buttons to navigate to the desired year. Press the Select button when finished.
You will then need to set the month. Press the Plus or Minus buttons to navigate to the desired month, then press the Select button.
Next you will need to set up the day. Press the Plus or Minus buttons to navigate to the desired day, then press the Select button.
The Honeywell T4 Pro has two clock format options; 12 hour or 24 hour. Press the Plus or Minus buttons to choose the desired clock format, then press the Select button. Press the Plus or Minus buttons to navigate to the desired time. You can also press and hold the Plus or Minus buttons to cycle through the numbers faster. Press the Select button when you have the desired time. The settings will now be saved.
Press the Home button to access the Home screen.
There are various different types of System mode settings; including Heat, Cool, and off. Press the Mode button to cycle through the modes until the desired System mode is displayed.
The advanced menu allows you to adjust thermostat settings, including the time and program schedule. Press the Menu button, then press the Plus or Minus buttons to cycle through the advanced menu options.
To turn programming on or off, ensure that Program is displayed on the screen, then press the Select button.
To edit the program schedule, ensure that ON is displayed then press the Select button.
Press the Plus or Minus buttons to navigate to the desired program schedule, then press the Select button.
When setting the program schedule, you can program four time periods each day, with different settings for weekdays and weekends.
Wake refers to the time that you wake up. Away refers to the time you expect to leave your house. Home refers to the time that you expect to return home. Sleep refers to the time that you generally go to bed.
Press the Select button to select the desired time period.
You will first be asked to set the heating schedule. Press the Select button. Press the Plus or Minus buttons to navigate to the desired time, then press the Select button. Press the Plus or Minus buttons to navigate to the desired temperature, then press the Select button. You will now be asked to set the cooling schedule. Follow these same steps to set each program setting and schedule.
If there are certain programmable settings that you want turned off, press the Plus button to navigate to OFF then press the Select button.
When you're done with your changes, press the Home button. Your changes will save and you will return to the home screen.
To override your program schedule, press the Plus button to navigate to the desired temperature. Press the Hold button add either a temporary hold or a permanent hold. Press the Cancel button to cancel any changes.
There are two different types of fan options. Fan Auto only runs when the heating or cooling system is on, and Fan On runs the fan continuously. Press the fan button to cycle through the fan options.
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Learn how to unlock the Honeywell T4 Pro thermostat here: bit.ly/2Ol2SW5

[@NumiSmatiK100]

*Solid, **Fastly.Cool** and gets the job done. For rooms where window-mounted air conditioning is not an option, this works very well. Easy set up, rapid cooling, and great design.*

[@kimberlychevlin7094]

I just want to be able to get heat when I'm cold and A/C when I'm hot. This is the most difficult thermostat on earth

[@micflo8811]

Agreed. I hate it

[@ribaallen4714]

I agree. I'm want the old one

[@DynamicEnergyExchange]

Yes! It's maddening. The house is so hot, I can't think and pressing the minus button isn't cooling things off.

[@Channel-ti4hf]

Yes! I just want to know how to put it in auto mode.

[@StonedDaisies]

I thought i was the only person, who could not get it to cool things off. I have tried everything and still nothing

[@dianacastaneda4284]

I feel good knowing that I am not the only one fighting with the thermostat.

[@windsofmarchjourneyperrytr2823]

HATE THIS ONE! ON/OFF HEAT/COOL, that's all I need it to do!!

[@dreunmason8315]

Purchased: August 2023 - still works GREAT!I kzbin.infoUgkxxsUnXhGsSJLim_XnMHyQK0u3XVaW-CGn live in a studio and during the summer it gets scorching hot - really old building with no ac units. I can’t express how EASY it was to install. This unit has been a life savior during the summer and some days during other seasons where it can still be a bit warm at night. In this small place is my friend, a husky, poodle mix and myself. We need AC - lolI don’t use the dehumidifier option - I’m not sure if it will leak in my house, since I did not install the small draining hose that came with it. May look into it late but I don’t worry about much humidity in the apartment. I don’t understand why the negative reviews since all things mentioned, I personally did not find issues with. Definitely worth it!

[@stevecobb76]

Great, another overly complicated thermostat!

[@rodelineberthil1249]

E

[@tennyis28]

that's about as simple as it can get for a programmable thermostat. If you want a basic one buy a basic one.

[@StudioSDP]

If you can’t figure out the Honeywell t series, you’ve got a problem

[@kfoster3616]

yep - Loved my old one - easy to turn off to save money - no programming involved. Wish I had removed that one to bring to the new house. I don't want to see my power bill. I just want hot or cold / on or off. I don't want to waste my time fooling with crap.

[@tsb2752]

@@StudioSDP No...you're wrong ...why are you here? Having a problem??

[@geraldwest3428]

Thanks for making it overwhelmingly clear NOT to purchase this particular thermostat.

[@chadblackwood579]

Worst thermostat out there

[@MrRacerdon40]

Yep, I had.a NEST for years before moving to a new house with these "Pro" thermostats, haven't stopped messing with them yet! Way too difficult to set/control. Too many vague steps. And having a CODE which is always 12345 makes no sense, why would they make you go through that? PITA, I'm going back to NEST....

[@ellenpacey8012]

@@MrRacerdon40 what kind of thermostat do you have now

[@MrRacerdon40]

@@ellenpacey8012 changed to Nest's. much more user friendly.

[@mickeymad29]

Wheres the guy who design this dam thermostat so I can smack him !!!

[@bigde9052]

ikr

[@nicslack08]

This video was so helpful!!! My new thermostat is now programed. Thank you.

[@teresacardenas1568]

I understood the directions clearly, and I was able to program the thermostat. I am a new homeowner, and this system was installed in my home. I was getting frustrated having to walk up and down the stairs to change the temperature. Now that I have learned what temperatures we are comfortable with, I can set it in the program mode. I won't have to wake up in the middle of the night from the heat!

[@louselouis289]

Program mode? Do you have it on temporary hold? I’m still so confused the temperature is always changing I’m so annoyed and I don’t understand this whole 12hr 24hr thing 😫

[@gerdahepburn1905]

Just got a new furnace with T4 thermostat .I am over 80 this is to much for me to go figure out I like things simple 😮

[@adrianamontelongo9412]

Me looking at this video: pause, rewind, play, rewind, wait what?, Play, rewind, rewind, pause, play.

[@amylynnsmith4117]

Ohmygosh.. I am not the only one!! Thanks

[@inperspective]

Right. Useless info. Just bought a new home with this thermostat installed and I can not figure out how to program temperature by time of day. Frustrating.

[@orome9793]

Up, Up, Down, Down, Left, Right, Left, Right, B, A, Start

[@RolyRhodes]

Wow, I'm gonna start a thermostat programming business! Judging by these comments, i could really clean up...😎

[@greenlit1446]

For surety guy an ass hat.

[@kirkmachin6597]

Thank you. I read the comments and can't understand the difficulty people are having. I only rewound twice and figured it out. Come on people! I'm glad it does as much as it does because I don't want to heat or cool the house to my desired temp if I am not home to enjoy it. Thank you again. P.S. I'm am old guy.

[@niktheref]

Do you NOT see Program available? -Press and hold "Menu" and "+" for 3 seconds. -You will see "ISU", press Select. -Scroll until you see "120". -Use the "+" or "-" to adjust the 120 setting to either 0, 2, 3, or 4. 0 = no programming 1 = programmable, weekdays + weekend (m-f, s/s) 2 = programmable, 5 days + sat + sun 3 = programmable, 7 days

[@lorim2803]

Thank you for this info, the AC guy threw out our manual

[@trevor-picard]

THANK YOU! this information was not easy to find. if only my landlord didn’t suck ass

[@Cork8790]

Wow thank you, I didn’t think my thermostat was programmable my HAC didn’t explain this part that I could program it, I have had for 2 years. Will also trash the manual bc it doesn’t explain how to program by pressing those 2 buttons as you described so thank you very much!

[@Annalovesautumn]

Lifesaver, thanks!

[@Bordeguy]

i love you

[@smylyface]

Thank you! I've had this thermostat for a year and could never figure it out. Your video does go a bit fast for people who are trying to follow along but FINALLY my heat/air come on when I want them to and my house stays at a comfortable temperature day and night. Loved waking up to a warm home after sleeping in a nice cool bedroom all night. Definitely makes it easier to get out of bed in the morning! 🙂

[@tiaravalentine1885]

Is the only way to get this system to work is to set up a full week program? Or were you also able to figure out how to get it to blow either AC or Heat given you desired temperature?

[@marsmotion]

from another commenter originally "In Perspective" ...this is important....Turns out the installer removed the PROG from the menu option. Honeywell instructed me to hold the MENU and the + button at the same time for 5 seconds, then you will get into the advanced menu. Select the 1st option (ISU) and then use the "+" key to change the 1 to 2. Then select home and it will save your changes. NOW, PROG will appear when you press the menu button. 🧐 after you et to the 2 from isu just hit home, ignore what comes after. see install booklet for more info.... its a good simple thermostat controller. take your time and read your manuals and watch the vids out there. there is nothing wrong with this thermostat. you do have to try to understand hierarchical menu interaction. one thing leads to another in a sequence. play around it will make sense.

[@richardgemelli4973]

Th4 pro

[@ResurrectingMe]

Omfg, I just want to 2 buttons - Up to make it warmer, down to make it colder. Why do these things need to be so complicated? 🙃

[@BODenKai]

cuz its supposed to help you save money....just like every other smart device

[@daniellecavanagh5756]

Yassss wanna start a company together lol

[@JeffAtkins]

why get a smart thermostat if you want a dumb one???? Go buy a basic digital thermostat.... cheap...

[@beccahday]

@@JeffAtkins jeff forgets, like an exceedingly typical oblivious aggressive insulting privileged old white man, that not everybody buys their thermostat. many people rent, rather than own, and have no choice. shocker, i know. "cheap" is all he can think of, as opposed to the infinite variety of other possibilities, such as working your ass off going to college full time, working a full-time job, and doing homework with all free hours, barely enough money to pay rent and buy groceries. don't be like jeff.

[@Daniela3969]

Yo, just turn off the program

[@deannahartman5851]

Thank you! I have had it for over a year and "locked" it without knowing how to unlock it. Also you explained the programming to me very well and now I almost NEVER have to even touch it!

[@0595dawn]

I'm watching the video PRAYING he will tell me how to unlock it. I thought I was setting the unl9ck code but now I can't get out of this f-ing screen. Why can't they just give us a book?

[@evening6402]

There's another Supply House video on KZbin that tells you how to unlock the thermostat.

[@haroldlong4307]

I speak perfect English, but I need an interpreter listening to this rendition of "How to do." Merciful Mother, "Guide me."

[@solmilagroscastillorebollo5767]

Thank you so much. I was freezing...and this video make my sleeping time wonderful. Tons of thanks!

[@LetItBeSummer-1]

They Make it so complicated and for those of us who just want to be able to turn the thermostat up or down to heat or cool, this is too complicated! Some of us have brain health issues & we don’t want this kind of elaborate thermostat. Insane.

[@richarddeleon8601]

I called the 1-800 last night. Even they were confused. Going to have to get a professional to come look at it.

[@halfdollar86]

Turn the programming and run it like snd old fashioned one

[@ribaallen4714]

how

[@william5642]

They make it look so easy, the directions are going to fast to understand. They need to slow down. These guys live and breathe this stuff and for some one can follow along and take notes.

[@BODenKai]

yea ppl like me hate slow videos.

[@windsofmarchjourneyperrytr2823]

Slow down the playback speed. Look for a gear at top right on phone screen. Use .75.

[@evening6402]

If you go to the video information, there's a complete transcript of what the narrator is saying on the video. Much easier to read along than to have to go through the play-pause-rewind-play routine.

[@heartnsoul3357]

Thank you. That worked! It’s 11 degrees here and power went off briefly. The heat came back on but screen only showed the year. Now I know more!

[@gwrace]

All I want is to have an auto setting where the thermostat cycles the heat or cooling as needed to keep the house at the same temperature. Don't need all of the programming. The builder installed these. Soon to be replaced

[@unfaix]

Yup, and these can't even do that

[@this_is_japes7409]

@@unfaix they actually can, it's just hidden under the most user unfriendly interface ever, under the ACTUAL advanced settings. forwardthinking.honeywellhome.com/assets/tseries/resources/install/T4%20Pro%20Install%20Instructions%20-%2033-00187EFS.pdf page 6 you're looking for setting #300. basically hold the center and + button (how the fxck is anyone supposed to know that since apartments don't give you the damn manual) and then just keep pressing select until it shows 300 and 0 and press + to set the 0 to 1 and then press home to set it. and then there auto-changeover goddamn option fxcking unlocked. WTF is wrong with whoever designed this not making that a default option.

[@jamesmeidinger7435]

@@this_is_japes7409 Thank you! I've been looking for a manual like this!

[@fresheddie..]

Can i set it manually? My stay on 60' i want too stay at 74'...

[@aznnp77]

Really nice looking thermostat, but incredible un-intuitive. I went a whole year without setting a schedule, but I realized it's kinda cold at night now. Figured a techie guy like me could figure out how to do a schedule, but no I had to go to youtube. Now I'm afraid to set it up because I don't wanna mess it up, and I like the ease of the up and down arrow. Simple enough.

[@JenFarrer]

Do you know how I can make the fan turn off? It runs 24/7 & has since I moved in this rental. It’s awful 😞

[@AntonioSmith-RCA]

This is just 😰😫💥

[@DougRayPhillips]

FIXES! I see a lot of complaints about the fan not shutting off, not having a menu setting that would activate both the furnace and the A/C, etc. Here's my experience. It may answer some of your questions. A HVAC technician installed this thermostat in my home, replacing one (a different brand) that wasn't working any more. There's an Owner's Manual, and an Installation Manual, in the box. The technician deliberately withheld the Installation Manual from us, saying that it's too complex for homeowners. I should've insisted. I'll put a link to a PDF of the Manual at the bottom of this comment. We were unhappy with the thermostat control, and with the way the furnace / A/C was acting. But a few changes to the defaults in Advanced Settings (also known as Installer Setup options ... "ISU's"... in the Installation Manual) fixed all that. Accessing those is covered on pages 6 thru 9 of the Manual. To enter the ISU Menu, do exactly what it says on Page 6. To save (rather than discard) your changes, exit the menu exactly as described. * We programmed a whole set of heating and cooling thresholds for all 4 parts of the day, and set the start times for each of the four parts of the day, in the regular Owner menu. But even though we wanted the same settings for every day of the week, we had to do it three times (once for weekdays, once for Saturday and once for Sunday) because the Installer default is 5-1-1 in ISU 120. That can be changed to 5-2 or to 7-day. * We had trouble with the fan never shutting off, in between cooling cycles. We never did make a change that I would've thought directly addressed that, but with the other changes we made (keep reading), it somehow got fixed. * The Owner's Manual said that Auto was a valid Mode, and showed it in a screenshot diagram, but it didn't show as an option on our screen. The only choices were Heat, Cool or Off. But this is fixable with ISU 300. Change it from Manual (0) to Automatic (1). Once you do that, Auto is a valid Mode. Activate Auto on the regular screen, and have a Schedule of heating and cooling thresholds entered, and you're all set. You can be away for however long, and it'll take care of itself. Cool the house during the day, and heat it at night, as necessary. * People were talking about the furnace or A/C gearing up and changing the temperature in advance of the time you'd programmed in. That's Adaptive Intelligent Recovery. If you don't want that, you turn it off with ISU 425. Change it from Yes (1) to No (0). ------ Note: DO NOT mess with ISU 205, in order to try to activate ISU 230 (or for any other reason). That's NOT how you fix the fan problem. If you have a forced air gas furnace or similar unit, the equipment (rather than the thermostat) DOES need to control the fan when you're in Heat mode. The fan needs to keep running for a while, in order to dispel the excess heat after a burn. I repeat... DO NOT change those settings. ------ * After we re-programmed ISU's 300 and 425, and of course selected Fan Auto rather than Fan On, things worked correctly. The fan ran during cooling cycles, and shut off in between cycles. I hope this helps someone. digitalassets.resideo.com/damroot/Original/10011/33-00187EFS.pdf

[@Anna-kj2bd]

Thank you

[@cherylchatburn-ross5927]

How do you skip over the “leave and return”? In order to do a reset, do you have to start all over?

[@The1Mansor]

Would not recommend. Too complicated. NOt intuitive. Very frustrating. Heater installer put this in. I was happy with our old programmable thermostat. This is way too complicated and the video above does not match up with what I see after inputting the date. Do not buy!

[@LS-jk3fk]

ikr

[@KartickBag-sy3sk]

7

[@jocarolepersonal]

I hate it, now I have to turn it off and can't find out how, compressor not working.

[@ob2be1]

When I hit the menu button I don’t get the option to program the thermostat it goes straight to the time option...

[@niktheref]

Do you NOT see Program available? -Press and hold "Menu" and "+" for 3 seconds. -You will see "ISU", press Select. -Scroll until you see "120". -Use the "+" or "-" to adjust the 120 setting to either 0, 2, 3, or 4. 0 = no programming 1 = programmable, weekdays + weekend (m-f, s/s) 2 = programmable, 5 days + sat + sun 3 = programmable, 7 days

[@theJBGary]

our fan is just blowing cold air, once and a while it will blow heat. trying to figure out if the thermostat is the problem or the new furnace. is there a way i can contact via phone to troubleshoot this further. we're looking at freeZING nights, we have followed the very clear instructions you have here. thank you for that

[@nykeemahhayes2399]

When you find out, please share with me too

[@Azshauyia]

Same...cold air

[@CWBella]

Excellent video- thanks!

[@scoobydoo5324]

How do I turn off the fan?

[@JJunkAFunk]

Left side shouldn’t be on cool or heat, set it to off. Right side set to fan auto. If that didn’t work then something is wrong. Gotta go into the manual or call the air conditioning maintenance guy.

[@rockangel4772]

This is the worst thermostat ever

[@marionstaples4676]

Press "show more" below the description of this thermostat. Print the information on how to set the thermostat. I think he is too fast as well, so now I read the different steps.

[@susane3610]

sounds like your a jerk Hotep Muh

[@kenparnell4297]

I know, right? All I want is to set the fucking temperature. I don't give a flying shit about setting times and fucking dates. It's a frigging thermostat, not a fucking appointment calendar.

[@spicychip773]

I agree. I hate it

[@Sane1015]

My thermostat wants the time and date and stuff AND as far as I can see isn't even programmable. I get why it wants this stuff with a programmable thermostats but... WTF is the purpose otherwise? I'm going to check my thermostat for the date??

[@n4lq]

After watching all these videos I concluded that if the instructor doesn't understand something, he just skips over it. Like how to program all days of the week at once etc.

[@agrt4889]

The PROG option first appeared in my thermostat first time I tried setting it up, locked it, unlocked it, and it no longer appears, only time date

[@arthurmuller3960]

Far too complcated

[@niktheref]

Do you NOT see Program available? -Press and hold "Menu" and "+" for 3 seconds. -You will see "ISU", press Select. -Scroll until you see "120". -Use the "+" or "-" to adjust the 120 setting to either 0, 2, 3, or 4. 0 = no programming 1 = programmable, weekdays + weekend (m-f, s/s) 2 = programmable, 5 days + sat + sun 3 = programmable, 7 days

[@brooksieasmith2706]

The Honeywell pro series has changed since several power outages. I noticed that it runs short cycles and turns on and off about every three to four minutes. Another item I have noticed the cool on now appears . It did not do that before. Do you have an answer? Thanks

[@bernicevinson5308]

(BV) I do not like this thermostat it is to complicated.

[@jackpowell2207]

dunny

[@f.marshall8268]

@@jackpowell2207 leave people alone you fucking swine

[@samuelraymond8834]

No shit, whys that Pig Fart @jacki powell trolling.

[@Sophiamia6960]

I totally agree!

[@jocarolepersonal]

I can't get it to show PROG, the technician told me to use the minus and plus keys which is only a manual fix. He should have programmed it himself when he was here.

[@davesimmons9023]

Is it possible to simply turn off the AC & heating in one’s house using this device? Thanks.

[@Meekmillan]

This thermostat is great. Finally my grandpa can’t change it cause he can’t figure out how to bring up the prog menu. 10/10. Set weekdays and weekends + nights to specific temps. It’s a wholeass *PACKAGE*

[@amylynnsmith4117]

I can not figure it out either!!! HELP!!

[@robertmoore6378]

thats right smartass, but he can rip it off the wall...

[@garrettbailey9299]

Does anyone know how to CHANGE THE LOCK PIN?

[@tropicalcolada07]

How do I turn OFF the fan!!!!!!!!??? It keeps clicking on and off in a millisecond. And it's always running.

[@ladyfox7762]

yes my problem I think they made this with kickbacks from electric companies

[@hemiweligalle6568]

Have you figured out? I have the same problem

[@ladyfox7762]

@@hemiweligalle6568 naw they find it where you can cut it off

[@葛晓明]

Does the Honeywell have a CPH adjustment or a differential adjustment. I wish it would wait for 2-3 degrees of change before kicking on again. For example, a thermostat with a +-12degree differential that is set at 70 degrees will turn an air conditioner on at 72degrees and off at 68 degrees.

[@thatguyD0Tcom]

Thank you for this! I needed it.

[@ron9986]

We recently got one and having trouble with time delay on cooling

[@ashutoshsharma4525]

this is by far the worst thermostat ever. Not at all intuitive or user friendly.

[@russellbrown6990]

Not sure about the worst, but it's pretty pathetic. We got a new furnace, and for some reason the installers "gave" us this one. It's bigger and uglier than the one we had before and offers nothing that our previous one didn't have. The installers blathered something about "more programmable," but it offers 4 time periods per day, just like our old one. The ability to turn off one or two time periods isn't worth the lousy interface.

[@LS-jk3fk]

yep

[@ageehairston1141]

I hate this thing! The "auto" feature is useless. The heat runs continuously even though it is set on auto. I've reset it several times. Sometimes cold air blows. I'm so frustrated. I'll definitely be calling the HVAC man after the holidays.

[@200991602]

Auto seems to mean nothing to that thermostat. I was becoming VERY concerned about the heater being "on" instead of auto. It refused to stop even when I lowered the temp ( kept blasting this enormous heat.) set it to 71 * from 74* , looked 13 mins. later, showed 84* ? Pretty freaky.

[@daniellecavanagh5756]

I second that!

[@alexaltamirano5797]

Hello, do you know if the thermostat can display the temperature in C rather than F?

[@chadfisher8054]

Love the fact that mine won't allow me to set the AC lower than 68. Judge me if you want and it is rare that I set the AC below 68 but I shouldn't have a "governor" on my AC. So this brand new unit in my brand new house will be replaced with a Nest.

[@herbb52]

Can the thermostat be programed to turn heating and cooling off and back on? What is the lowest and highest temp the thermostat can be set to?

[@whiteemerald_6802]

IF YOUR THERMOSTAT IS LOCKED AND YOU DIDN'T SET A PASSWORD ALREADY, TRY 1234. *I probably saved you from the summer heat. haha. Enjoy your AC :)*

[@velvetmclawrie7366]

White Emerald_

[@velvetmclawrie7366]

You Have NO IDEA how Much that helped!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Thank you thank you

[@shawnette3392]

White Emerald_ yess mine just worked

[@jus-bn-honestbrown3631]

IT WORKED!!! THANK U THANK U THANK U!!!

[@L2design]

YES 1234 WORKED THANK YOUUUUUUU--GOT MY MOM OFF MY BACK!!!

[@LizaMisch]

We bought a house and it came with this and js just so difficult to figure out. I have the pro, do I unlock it the same way as the pro4?

[@The1Mansor]

thank you white emerald for the unlock code!

[@kfoster3616]

what is the unlock code and why should I know it?

[@sameasnone]

How do I schedule it for Wednesday and Fridays only? All week days seem to be together.

[@epitt906]

Watch video at 2:45,,,,,,you got to do this on Mon,Tues & Thursday......I know don't said it...lol

[@elwacho233]

I Can't even set the temperature on this thing he makes it look easy 😅

[@housesnakemorphs]

Every time I think I’ve finally programmed this thing, I find out I didn’t. The weekly programming forces you to set a heat temperature and a cool temperature. In that order. For each of the 4 time periods. He really needs to explain what this means. One would assume that would mean “start heating if thermostat is below this number” and then “start cooling if thermostat reaches above this number” Set the program to heat 74 and cool 77. It’s now 69 degrees and it’s displaying “following schedule” and “cool” mode instead of heat, and it’s doing absolutely nothing. If I click to change the mode to heat, then it will temporarily heat up until the house reaches that number then go back to “following schedule” If you set it to cool mode, say 74 degrees, this thermostat will never put the heat on. So you’ll wake up to a 35 degree house. If you put it on heat mode 74 degrees, it will heat up to 74 and never turn the ac on, so you’ll come home to an 85 degree house. I have lived with this for 6 months now. I have found no way to set this to just maintain one temperature or even a range of temperatures. Teaching us how to press the buttons does not explain how to get the desired outcome at all.

[@ijaquonstone4358]

Tgank u this realy helped me out

[@slackwayneo]

I cannot get to the program part when I push the center button it goes right to time and date and then it says AC

[@briangmendezortiz1862]

I just moved to this new apartment and have one of this. But the heat and cold are not working at all 🙄 Turned the heat on for about 2 hours to 75° and the apartment still was at 67° Same thing happening with the cold.

[@leewhiteshappyhome7241]

Hi my thermostat came with my new house and I have no idea how to work it, despite research into manuals, troubleshooting sites and KZbin videos. My 2 major issues are #1 Only mode choices are FAN, COOL and OFF - no AUTO. I really need auto as it's fall and the temp fluctuates greatly. When I try to change the settings in MENU, it does not show PROG, only TIME, DATE, F/C and LOCK. Any suggestions? The back tells me I have a Honeywell Model: TH6220U2000 1730 which looks like the model shown in your video. Thanks!

[@joegarcia2400]

You’re going to have to restore back to default settings in menu

[@WorleyBird10]

Smart Mark Sterling!

[@jayfoulk2453]

I turned off the program, selected cool mode, and set the temp to 72. It worked fine for awhile, and now it's 75 in the house and I can't get it to cool any lower. What's the deal?

[@jayfoulk2453]

I just had the entire AC system put in yesterday and the installer told me to read the instructions on how to operate the thermostat. I thought a programmable would be great, but this thing is more difficult than 4th grade math class.

[@7318ify]

I can’t access the weekly schedule on this thermostat!? How the hell do you program this thing? The prog option is not there after I push menu

[@Zanagash]

This thermostat suuuucckkkss ! I want the think to cool down before I get home and cool even more at night (which it does well) BUT when I leave I want it to turn off until the temperature reaches 70, then keep the temp to 70, until it’s time to cool down to my arriving time. What this stupid thing does is Warming up to 70 ! Instead of letting it warm up naturally. I’ll be switching it asap.

[@torismith1555]

Anyway of changing it from Celsius to Fahrenheit?

[@DavidMortaz]

How can we reset this thermostat to factory setting!!?!? The fan comes on, but the Compressor won't come on!!

[@keithr2969]

you press the center button and the '+' button. Then select Factory Reset

[@grantking2880]

I hope you figured it out by now, but for others experiencing this it could be the compressor delay safety feature on these thermostats. The feature will delay the compressor turning on for 30 sec to 5 minutes I think. The first time I turn mine on in a season "Cool On" just blinks for a while before clicking on.

[@kwsrchoudhury]

Can someone explain is this suppose to be on Temp or Permanent hold?

[@michaelbabich7921]

Pretty thorough, thanks, for what is a way too complicated thing. btw, only issue is you state @2:53 to "hold" temporarily or permanent, but don't show how. Is it dependent upon the length of time you press the "hold" button?

[@Supplyhouse]

You only need to quick press the hold button, not press and hold. Each press toggles whether or not a temporary hold or a permanent hold is selected.

[@SheCreatesStuff2]

Having a tech background helps in programing the thermostat, but for the life of me I cannot find how to stop what seems to be a fresh airflow setting. even when my unit and fan are set to OFF the fan kicks on and blows air. I don't want air blowing night and day! How can I stop this feature?

[@jawaharpradeep]

Set fan to AUTO and System to OFF

[@griff522]

@@jawaharpradeep my fan still blows even on auto and system OFF. my whole is issue is that the fan blows constantly regardless of the fan mode setting. even when i turn the system off the fan continues to blow! so frustrating!

[@edzaslow]

Whether you like it or not will depend a lot on how tech savvy you are. Really isn't that complicated, once you get the hang of it. Excellent video, by the way.

[@lorraineborba5607]

Well for some who are Not so high tech!

[@cigarman1021]

Hello why does it take 7 to 8 minutes for the thermostat to turn off unit after reaching set temp. Also, temp does not change, and unit will turn on after 3.25 minutes after finally turning off. Is there a parameter not set right, and batteries have been changed. please help.. the only way to keep it off for a little while is to set temp higher..

[@chelsey4572]

put my new thermostat on heat & when it turns on it just blows cold air . what do i do ?

[@Rainy_Day12234]

My T4 thermostat doesn’t have program ability to set a schedule. Is this normal?

[@barry5724]

Yes, he could speak a little slower, but I got it to work. Better if there was NO background music.

[@scottharrass7610]

How to set the thermostat beyond 68? I tried it manually up to 80 degrees but it never goes past 68?

[@windsofmarchjourneyperrytr2823]

We had that. Look into the programming options and turn them.OFF.

[@nancyruvo9613]

All I want is for the house to cool to 62 by 11pm, and rise to 74 for the day, starting around 7. Instead it starts blowing cold air by 9 Pm, and is still too cold in the am. Please help!!

[@phillyPeanut1123]

This is what's going on with mine. Did you find out how to fix

[@XxStonedImmaculatexX]

I have this same model, or it looks like I do, and I don’t see the word “hold” available when I manually change things. I had a brand new AC and Heater installed along with this thermostat and the fan has turned in by itself when it was completely off and the it changed from cool to heat by itself, and its not programmed but I checked and no schedule is set or on. Is it possible it was wired wrong?

[@xry111]

OMG! I just want to turn the fricken thing down a couple degrees.. I don’t want to reprogram the entire week in 3 day parts. “Select plus home menu menu select home plus plus home select plus home select select select”. This video sucks as much as the overly complicated thermostat.

[@chuckwright8889]

Agreed......if you're merely hot, and want to cool off, you're FKED

[@spicychip773]

I agree! 😒 I hate it

[@calibiggdogg5047]

Thx good video thermostat is easy to use and straight forward easy to read also self explanatory

[@ecruses]

What’s Smart Mark doing in the thermostat zone?

[@christinecruz-ferrer7554]

so can i set the program on cool mode at night, but i want the heater to run in the morning. I can't seem to switch from cool to heat within the programmed temp. Any clue?

[@MrCollijm]

Ask someone from MENSA.

[@emileighweick7087]

Mine is blinking with date and select option but buttons will not work?! Any suggestions

[@mzkrush7792]

My thermostat never showed the program option??? Ugggh.. I'm trying to set up the programmable settings.

[@samwheat8348]

Horrible thermostat. Very confusing and keeps running even when you turn it off.

[@LS-jk3fk]

yep this thermostat sucks 👎

[@cueyork8179]

MY TEMPERATURE WONT DROP BELOW 90 DEGREES!!! HOW CAN I GET IT TO START BLOWING COLD AIR CONTINUOUSLY FOR A FEW HOURS ??? MY HOME IS WAY TO HOT 🥵

[@ludovikpravoslavnik8785]

I ended up turning on the A/C to prevent toasting.

[@yaelschnall9898]

I love your presentation, you covered so much. But I probably won't be able to remember it all, and was wondering where can I get the actual printed manual.

[@Supplyhouse]

Thank you! The script for this video is included in the video description. The printed Honeywell manual should have come with your thermostat, but it is also available online here - forwardthinking.honeywellhome.com/assets/tseries/resources/install/T4%20Pro%20User%20Guide%20-%2033-00188EFS.pdf

[@oman350]

Does it not have wifi capability?????

[@mattfromaz]

There is no PROG option in menu. How do I get it to appear?

[@niktheref]

Do you NOT see Program available? -Press and hold "Menu" and "+" for 3 seconds. -You will see "ISU", press Select. -Scroll until you see "120". -Use the "+" or "-" to adjust the 120 setting to either 0, 2, 3, or 4. 0 = no programming 1 = programmable, weekdays + weekend (m-f, s/s) 2 = programmable, 5 days + sat + sun 3 = programmable, 7 days

[@dianefrush2577]

I do not get the 120 option when doing this.

[@nichellegradiz846]

Hello, new system for us and we can’t figure it out lol Our stat keeps our a/c running continuously. No our fan is not on it’s set to auto.. temp is set to 74 and the temp is of course hot it’s like 88 feels like 89. But our in home temp gets higher than desired temp and refuses to drop to desired temp to shit the system off. Why does it do this? It feels comfortable but just won’t shut off. The in home temp (according to stat) will get almost 80 rather than drop to the set temp and shut off. When it’s cold out our heat will run 2.5 mins and shut off for 4mins and that’s it’s continuous cycle.. not sure if that’s normal either.

[@ashleyj5341]

Likewise, this keeps my furnace running way too much. There is no temperature swing differential, which, in my old drafty house, I need. Furnace guys installed this garbage and trashed my old one. I'm getting a Lux installed. They have battery issues but I can control the temperature swing and cycling of my furnace much better. Honeywells will cause equipment to short cycle. I had the HVAC guys lower the cycles per hour to 2 and it's still coming on 3 times. Absolute trash. These say they have a +/- 1 differential but it's more like 0.2-0.5. Insane unless you live in a shrink-wrapped house.

[@MyIronman8]

First option is to replace it. With some thing other

[@TennisOnAction]

Fan Auto or On. which one is for setting timer?

[@Post1445]

Is that smart mark sterling???

[@64sidejack]

I just had one of these installed yesterday. it was reading 75 degrees when in fact it was only about 65. it now reads 83 when it is in fact about ten degrees lower. I don't have a clue as to why this thing is way out of calibration. it reads about ten degrees higher than it actually is in this apt. what the hell ,is up with that? I think I was better off with the old thermostat

[@nichellegradiz846]

Same here it’s crazy

[@classic287]

How come the instructions that comes with it are impossible?

[@edestevez6532]

My T4 Pro is working fine.

[@vivianukwu4189]

I’m trying to program my Honeywell pro series thermostat. Please, at what temperature should I set cool? I set the heat at 75, now I’m wondering what to set for the cool?

[@darko714]

Set the cool a for a few degrees above the heat, otherwise the AC and the heat will fight for supremacy. P.S. 75 seems awfully high for heat.

[@johnlopez4089]

Ok it’s unlock it’s on hold. Still no heat, still cold. This thing is a piece of shit. If I can’t figure it out how is my 84 year old mother supposed to👎👎

[@daniellecavanagh5756]

At least yours is cool I’m sweating in my own home

[@lexiinextdoor1720]

How do I get heat ??

[@theakway7999]

Is this one compatible with the app?

[@debisnider4335]

Talks much too fast. Thank goodness I discovered I could copy and past the dialogue onto a word document to read while at the thermostat. It would be nice if there was a print button that would print this in a readable format.