T9 Thermostat: Features and functionality

[@timothyflynn8714]

I agree, I got the thermostat for Christmas and two sensors... I just got the UV light for my ductwork today and will install it tomorrow. I have been watching videos on the Honeywell Home products and I am pretty excited to have them in my home. I will know more once I see how well it learns my routines. So far I love the look and the house is comfortable.

[@8181k]

For Heat Pump systems with backup heat. What logic does the T9 use to kick on the AUX heat source? I want to be able to configure this so the AUX heat doesn't kick on as long as the outdoor temperature is above a certain point. I know there is an AUX Threshold setting on the Ecobee units. But don't see it on my T9.

[@ResideoSupport]

Hi 818k, we'd love to answer your questions by having further information about your system type, current configuration and more. At your convenience, please contact us with any questions at 800-633-3991, you can also find us on Facebook and Twitter under Honeywell Homes. -Charlie

[@timgleason1883]

So I just purchased the T9 today and I removed my old one and installed the T9 but it does not come on. If the Blue C wire is maybe not connected up in the attic would this prevent the thermostat to not activate? I reinstalled my old one and it works HELP Please

[@pavelushakov6612]

I have two separate systems connected to my T9: AC for cooling, and a Boiler (water pipes) for heating. Is it ok to "shove" two (2) C-Wires (one from AC; one from the boiler) into the "C" port in the thermostat mount?

[@ResideoSupport]

Hi Pavel, we thank you for reaching out! When you have a moment, please share the complete wiring information via private message at Facebook Honeywell Home to further assist you. Thank you! -Charlie

[@neogeek23]

I have a zoned system and would like to have one T9 control my motorized damper. How can I set my T9 with various room sensors to direct heating/cooling to the desired room?

[@ResideoSupport]

Hi neogeek23, thanks for reaching out! We'd like to know more about your system and current installation to investigate compatibility. When you have a moment, send us a private message over Facebook/Twitter under Honeywell Home. -Charlie

[@ResideoSupport]

Hi Tim, that is correct. The T9 needs a 24 volt C wire for power. If that wire doesn't provide power then the T9 won't on. -Jim

[@jarceneaux69]

I have an existing digital wi-fi thermostat that uses a battery pack and it has a Green, Red, Yellow, and White wires connected to Y1, W1, RC, and G with a Blue wire that isn't connected to anything. This is a York central AC system with a Gas furnace. What honeywell thermostat is compatible? I purchased 2 T5s but they won't power on when wired according to the instructions. Will the T9 work?

[@ResideoSupport]

Hi Jeffery, thank you for contacting us. All our Wi-Fi thermostats will work with your existing wires but they will need a C wire for power. You can trace the blue unused wire, connect it to the C or Com24 terminal of your furnace and then connect the other end to the C terminal of your smart thermostat. if you have further questions you can reach out to us at [phone] or sending us a DM to our 'Honeywell Home' Facebook or Twitter accounts and we will be happy to help. -Maria

[@robwinemiller9712]

some question for ya on this tstat and our system. we recently had a new 2 stage heating and cooling system installed in our older home. same york system as the older 25+ year old units. we have this tstat, and we enjoy the features it has, but it seems to run forever. we were told with cooling not to drop the temps further then 2 degrees from desired or it will run longer. i have ours set to cool to 75 for specific times, then raise to 77 like when not home for specific times. when home and it calls for ac to run, it only takes maybe 15 mins to get to desired temp, but never shuts down for like 30-40 mins. then once it shuts off, it kicks back on in 5-7 mins. it does this all evening long. so our first elect bill was really high. to me this seems something is not right. why does it run for so long after desired temp is met. it just sits there and runs when its showing the desired temp. any advice would be great. thanks

[@ResideoSupport]

Hi Rob, this is how our newer thermostats operate, very sensitive to the temperature reading. If the indoor reading comes within 1.5 degrees of the setpoint the system will turn on. This is in place to maintain the setpoint. One setting you can look at is the indoor offset where you can adjust the reading +or- 3 degrees to meet the standards of your home. This setting is under preferences in the menu. -Joey

[@robwinemiller9712]

@@ResideoSupport thanks for getting back to me, was wondering if it was something like that. Will check that out. Hopefully that will fix it, just runs all the time and makes our bill $$$$$. In my situation which way should I adjust that to hold temp longer

[@robwinemiller9712]

@@ResideoSupport just curious, if you want to hold a temp at 75, what do you recommend for adjusting the setting it was set to 0, should I go +1 or -1

[@ResideoSupport]

If the thermostat is showing a higher temperature than what it is you should go with -1, but if the inside temperature readings are lower then you should select +1. -Maria

[@ericfletcher8144]

I want to replace the 2006-era thermostat for our geothermal heat pump to be able to adjust the programming with an app to avoid always needing to go through the awkward multi-step manual process on the thermostat panel. However, I have not been able to find details about whether the app allows me to save different heat/cool programs so they can be implemented to replace the current schedule. For example, if I create a set of heat/cool times for when we are away, I'd like to be able to apply them by just opening the saved set - and then be able to remotely restore the "normal" settings to be in effect when we arrive home. The videos all seem to imply that changing the programming needs to be done the same way on the app and the thermostat screen, but that doesn't seem very useful.

[@ResideoSupport]

Hi Eric, thanks for the question! The T9 is only able to save/follow one program at a time. You would have to reprogram the schedule each time to change from "normal" to "away". We recommend programming for the most used schedule and then adjusting when needed. You can use the Honeywell Home app to manage temperature changes/holds when you want different settings temporarily.

[@wingsqc]

Which would be the recommended setup for a two levels house having two independent heating/ cooling systems (currently one thermostat per level)? It would be nice to see every room of the house on the same thermostat or, at least, on the same app page..

[@ResideoSupport]

Hello, wings. qc! Thank you for contacting us. We are happy to help you. Please, send us a Private message on Facebook and include a picture of the wiring on the back of your recent thermostat and we will help you to find out your system type. -Alex

[@renwickfonceca7552]

Can this be used for my Mitsubishi heavy industries ducted cooling/heating?

[@ResideoSupport]

Hi renwick fonceca, thank you for contacting us. To check the compatibility we need to know how many total wires you have and which terminals are being used on your current thermostat controlling that system. -Maria

[@stevenmcclurg7097]

I own two of these. I haven't been able to get mine connected back to my wifi after resetting my router over a month ago. Customer service has been difficult to get a hold of via phone, and they have stopped responding to my emails. Very frustrating.

[@kabarrion]

May need to enable 2.4ghz mode on your router

[@roxanagomez2093]

I have the same problem

[@randolphpollock1611]

I just installed the T9 successfully except I can’t get the sensor to pair with the thermostat. I’m getting a “Can’t enter enroll mode” error message on the display. Any suggestions on how to fix? Thank you

[@ResideoSupport]

Hello Randolph! We are happy to help, please feel free to reach out to us on Facebook/Twitter with a private message or call us at 1-800-468-1502 for support. We look forward to hearing from you soon. -Tom

[@bgmobman1]

Excellent overview. Thanks

[@logangriffiths721]

Do you need zoning in the home for the thermostat to be able to target the one room that needs to be heated/cooled? If it just blows a higher average to get the room to the desired temperature, would it just make the other rooms on that floor hotter/colder? We are having a new system installed and getting the T10 and one sensor for a cold/hotter room. We do not currently have a zoning system installed. So I am trying to understand how the sensor actually works. Thanks!

[@ResideoSupport]

thanks for reaching out, yes it will need to be a zoned system -Jared

[@kathydeman1956]

My geofencing continues to override our schedule we set up when we first installed the thermostat. Our schedule is no longer working. I’ve tried to disable the geofencing and even deleted the app but the scheduling functionality is not working.

[@ResideoSupport]

Hi Kathy, happy to look into this for you. Please provide us with the model number and MAC ID of your thermostat so that we can better assist. -Paul

[@blakemorgan3993]

How do I change the priority room it’s set on. It cools my living room and guest bedroom downstairs but in my bedrooms upstairs it’s super hot and barely comes out of the register. Dying of sleeping in the heat when it’s freezing downstairs in the living room.

[@ResideoSupport]

Hi Blake, thank you for reaching out to us. You can select the priority from the thermostat's screen or from the app. On the app, select your thermostat, then tap the priority icon and select the desired room and hit 'Save'. On the screen of the thermostat go to Menu (3 bar icon), then select 'Priority', select the desired room and then press 'Done'. -Maria

[@1decee]

What is the minimum heat set point that this unit can be lowered to?

[@ResideoSupport]

The minimum temperature ranges are: 50 F (cool) and 40 F (heat). -Joey

[@JeffBrown1966]

Can the T9 control the dehumidify mode on my AC Unit?

[@ajordan22]

No, the T10 can.

[@SameerMalik-es5ij]

I have this in a new home I’m buying. How do I know that my ac system is compatible with this thermostat and actually does work with selecting rooms. Don’t I need a dampener ac system to ensure this works correctly? Sorry if I’m not fully making sense, this is all new to me

[@ResideoSupport]

Hi Sameer, if your system has a C wire for power then it will be compatible. If you don't feel comfortable with looking at the terminal board at your system to see if you have a C wire, we recommend reaching out to a contractor to assist. -Jim

[@SameerMalik-es5ij]

@@ResideoSupport Looks like I’ll be hiring a hvac contractor to do a walkthrough before I purchase the home

[@07srb09]

Why I don't have options for cooling? On T9 termostat. Here shows "auto, cool, heat, off" I have only heat and off???

[@ResideoSupport]

It sounds like the thermostat is configured for a heat-only application. You can change the system type by following the steps below. 1. Touch the menu icon (3 horizontal lines at bottom of display) 2. Scroll down and touch “Advanced setup” 3. Then touch “modify configuration”. 4. Tap next until number 2070 Cool Stages/Compressor stages appear. 5. Tap the up arrow to 1, select done to save. -Joey

[@titusllewelyn]

J have a new T9 thermpstat. When I try to add a new sensor I get a message tht says "Can't Enter Enroll Mode". What is wrong?

[@ResideoSupport]

Hello Titus! We're sorry to hear about your situation. Please try a factory reset on your thermostat and enroll the sensor again. If you still have issues, please contact us through a private message on our Facebook page. Alternatively, you can reach out to support directly at 1-800-633-3991. -Dinorah

[@CharliesLazy3DPrints]

So to turn off and on the air system I have to press the three bars at the bottom, then mode, then off? There’s no way to do that from the main screen?

[@ResideoSupport]

Hi there, to set the system mode you will have to tap the menu icon, then tap 'Select Mode' and tap the mode that you want. You can also change the mode using the Honeywell Home app, log in, select the thermostat and tap the mode icon. - Maria

[@SamuelProcopio]

Hi, does Honeywell RTH985WF works with the room sensor?

[@ResideoSupport]

Hi Samuel, thanks for reaching out to us. These sensors are compatible only with T9 and T10 thermostats. For additional questions or concerns, please feel free to contact us at 1-855-733-5465, or you can send us a private message on our Facebook or Twitter page under "Honeywell Home". We'll be happy to help. - Laura

[@dvnstone]

Sad i can find information on the features in the app as for data logging.

[@reginaldoxley1430]

Can a T9 downstairs with sensors throughout the entire house work with a T6 upstairs? I’m not trying to replace both thermostats since they work fine.

[@gg80108]

How do I navigate to turn off emergency heat, t9 thermostat?

[@ResideoSupport]

Hello! If you could send us a private message on Instagram or Facebook with the model number of your thermostat, we'll be happy to provide more detailed assistance! -Lucero

[@Gary-ib8dz]

Can I use this if I have 2 thermostats in my house (1 upstairs and 1 downstairs)?

[@ResideoSupport]

Hi Gary thanks for the question if you could tell us the model of the thermostat your referring too so we can give you a better response. The thermostat model can be located on the back of the stat. -John

[@OnlineMD]

We now have a T9 upstairs with its extra sensor in our master bedroom, and downstairs we have a model 9000 color screen WiFi thermostat. Two separate apps though; The Honeywell Home app for the T9 and the TCC app for the model 9000. I was told they are going to put all thermostats on the Home app, when they get to doing so :)

[@Gary-ib8dz]

I was talking about the T9. I bought them and they both work in the one app. The temperature swing (I think that is what it's called) needs to be changed it adjustable. It does too good of a job at trying to keep it right at one temperature. It makes my air conditioner run for shorter times which means it turns off and on more.

[@gl5092]

Humidifier settings?

[@ResideoSupport]

Hi LMTN, you can see the current Indoor Humidity Level on the main screen of the thermostat. -Charlie

[@rickcormier9160]

My existing thermostat and return air are near our carport door. My heater or AC kick on whenever the door is opened. Would putting the T-9’s remote sensor in our family room eliminate the main thermostat from turning on our system everytime anyone opens the carport door?

[@ResideoSupport]

Hi Rick, thanks for reaching out to us. Yes, you can select which rooms/smart room sensors you want your thermostat to focus on (which rooms it should measure). You can even select multiple rooms to be prioritized, like all 3 of the bedrooms, and the thermostat will heat or cool the home based on an average of those rooms. -Jerry

[@rickcormier9160]

@@ResideoSupport Thank you, I have different, but similar, problems at both of my homes. Honeywells website gave me contacts for both of my locations. This would be a great upgrade to add wifi control and to also fix the thermostat issue!

[@ResideoSupport]

You're welcome. Please feel free to contact us again if additional questions arise. -Jerry

[@rickcormier9160]

@@ResideoSupport Two more questions. Do the remote sensors require power (AC or batteries) and do they connect wirelessly. My local AC guy reminded me that I have a two story house and that running wires to the remote would be costly.

[@ResideoSupport]

The sensors do not require any wiring and they use 2 AAA alkaline batteries. -Maria

[@jhonathanflorez8619]

It's locked, I touch the screen and it doesn't do anything, it's locked, how to unlock it

[@ResideoSupport]

Hi Jhonathan, thank you for reaching out to us. To unlock the T9, please touch any part of the display to wake the thermostat, then touch the MENU icon at the bottom of the screen, then scroll down and select Security. Select “Change lock mode” and select Unlocked. -Maria

[@jhonathanflorez8619]

@@ResideoSupport It's just that I touch any part of the screen and it doesn't do anything, it's the same clock and nothing else comes up or menu, Nasa doesn't do anything.

[@ResideoSupport]

Please remove the thermostat from the wall for 3 minutes, then put it back and let us know if it continues to be unresponsive. -Maria

[@OnlineMD]

Wish I can quickly display, or see on my app, the current temperature in the room where the sensor is. Also I have to run two apps, the Honeywell home app for the T9, and the TCC App for my WiFi model 9000 thermostat. Customer support said they are working to combine the two. Regarding the extra room sensor, it is supposed to detect activity and adjust the temperature in that room. But I found that after we go to bed, there is no movement in that room rest of the night, and the thermostat seems to think there is no one there so it takes that room off its active list! What do you want us to do, jump around like monkeys in bed all night to keep the thermostat sensor active??? :) :) :)

[@ChristopherJonesDesign]

The Priority screen displays the temp reading from all your connected sensors. This is one tap away from the thermostat home screen or the thermostat screen in the app. If you set your Priority to "selected rooms" instead of "active rooms" you'll be able to specify your bedroom sensor and not worry about it not detecting motion while you're asleep.

[@mre507]

My thermostat does not find my WiFi. Why is it not locating my WiFi?

[@WakeUpAmerican000s]

This is a capable thermostat, and overall I like it. But it could be SO much more useful with just a few tweaks to enhance data reporting. The Android app would be much better for using, optimizing, and troubleshooting the heating system if it (the app) reported the "Equipment Status" screen so users could see what stage the furnace or AC compressor was running. The RUNTIME reporting in the app is pretty lame, giving only a total time for heat or AC, and even that takes about 48 hours to show up. (i.e. I can't use the T9 or its android app to see how long the furnace ran in stage-1 to heat the house this morning. Run-times take two days+ to show up, and one only gets total time in a given day for heat and cooling runtimes. No breakout by number of on-off cycles by time of day like the Google Nest provides. LASTLY - The Honeywell / Residio T9 and T10 documentation is completely silent on how these units handle two-stage heating. There are no user-configurable settings in these T-stats for when to kick up "low-heat" to "high-heat" for instance. So my T9 kept my furnace running for nearly two hours this morning (on the low stage 1) to raise the temperature One degree F. Had it kicked to hi-heat stage 2, the furnace would've been done in 15 minutes.

[@ResideoSupport]

Hi, we're always looking for ways to improve the experience for our customers so we really appreciate the feedback! If you ever need assistance, please contact us through Facebook and Twitter under Honeywell Home. -Charlie

[@usforcessupporter]

Poor design. Can't set time

[@darpansharma8157]

I have old honeywell noo-smart thermostat. Reason I am changing is my basement is cold always but upstair is hot enough. Can I place sensor in basement and thermostat upstair?will it pair and keep basement warm in winters?I dont have a big house

[@ResideoSupport]

Hi Darpan Sharma, we thank you for reaching out! The sensor can average the hot or cold spots in your home to provide a more consistent temperature, you can configure the thermostat to have a priority reading of the sensor room so it can work with the HVAC system on your home.- Charlie -Charlie