Smart Valve Operation on a Gas Furnace!

[@acservicetechchannel]

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[@itz_mohittt869]

Sir suggest me best adjustble wrench for tight flair nut. Available in india

[@Rinebo]

I can’t thank you enough for these videos! I’m on break from work and these are helping me sharpen up before going back!

[@clucknorriz6683]

You make great videos Your instructions are impeccable. I spent 32 years in the field and now I sell HVAC supplies equipment for a major wholesaler in Las Vegas, when some of the young guys get stuck over the phone I revert them to your videos, and tell them to subscribe

[@NorCal-refrigeration]

I wonder how many of us techs call them the dumb valve. 😂

[@acservicetechchannel]

I am sure many, thanks Nor-Cal! You do great work!

[@joerice1372]

I know I do.. I absolutely hate smart valve

[@lizarraga337]

☝

[@thomaswilliams8624]

😅😅😅😅😅😅

[@timrob0420]

Ngl if I see one of these on an older furnace 19-20 years old and it’s having issues I try to get them to get a new furnace

[@Sctronic209]

Great explanation your a great Instructor.

[@acservicetechchannel]

Thank you very much HVAC1!

[@rodgraff1782]

Honeywell smart valve with intermittent pilot and 24 volt hot surface ignitor was one of the most troublesome systems when I was in the trade. Close second to the White Rodgers mercury flame sensor, intermittent pilot with lock out.

[@felixtrejo4542]

As always great video!! Thank you Craig for sharing your knowledge.

[@acservicetechchannel]

Glad you enjoyed it

[@SombraLocs]

You're dropping gems!

[@toddbehrends1373]

Merry Christmas and Happy New Year to you and your company. I have 2 favorite channels and yours is 1 of them. I am not a tech, but this knowledge is helpful when a problem arises in one of the units at a rental house. I can diagnose a problem and then get the parts, or some more help, to fix the problem.

[@hkhsm359]

Great knowledge and explanation. Thanks for sharing

[@acservicetechchannel]

My pleasure

[@TheMaximomex]

Thank you for these videos. They help a lot.

[@acservicetechchannel]

Glad you like them!

[@martinm7912]

Great video! Thank you

[@acservicetechchannel]

Glad you liked it!

[@brettmorgan5612]

Another very informative video. I can’t watch enough of these. Thanks for all your time and effort.

[@acservicetechchannel]

I appreciate that Brett!

[@jonathanraul4086]

Great video once again thanks for sharing your knowledge you're the man

[@acservicetechchannel]

I appreciate that!

[@monsantofungaro5704]

Great video, so easy to follow along and understand. Thank you very much!

[@acservicetechchannel]

You're very welcome!

[@johnrandich]

Loved the info pal . Thku!!!!

[@jeffarney7762]

I would love an explanation on the old Bryant/Carrier 3 wire pilot burners. The ones with the circuit board behind the inducer motor!! Very informative video btw!

[@clucknorriz6683]

Aggh the old 671, what do you want to know about it?

[@clucknorriz6683]

ICM makes a board for it I believe it's A278 the ICM 278.

[@jimmysegovia2688]

awesome vid!!! thanks craig for sharing.

[@acservicetechchannel]

Thanks for watching!

[@tjriver6653]

like this guy help the world, thank you alot.

[@pizzle1011]

Great video... happy holidays!!

[@acservicetechchannel]

Happy holidays!

[@gmac280]

Another great instructional video!

[@craigkachadorian7793]

Thank you Craig

[@mrwill1779]

great video

[@acservicetechchannel]

Glad you enjoyed it

[@jedcusimano1973]

Great Video. Very Helpful, but still stumped. I have power coming from the board on the blue wire through the pressure switch (verified it is closed) to the end of the 4 pin harness but still no power to ignitor. I also tested all the other safety switches and all are closed. No power coming back on orange wire since ignitor not getting power. Any suggestions?

[@frankduarte7109]

Did you ever figure this out? Ima say bad gas valve?

[@ANIMALHOUSEBEATZ]

Very informative video. I have a better understanding now. I'm having problems with the furnace right now. I have Honeywell smart valve and it seems it's not clicking to release the gas. Also notice the igniter is not glowing. I'm going to buy a multimeter to diagnose this.

[@sparkyobrian6417]

excellent video; im waiting for the poe or can bus thermostats to show up as it easier for engineers to design and cheaper to build, thus making the techs job harder.

[@frankduarte7109]

Great video!!

[@SuperVstech]

The smart valve came out as a consolidation of the safety flame controls. Back in the day, 80%and higher furnaces needed ignition and flame proofing. The smart valve was just a Honeywell decision to integrate the safeties. Makes a cheap board into an expensive gas controller. Forcing expensive replacement parts WHEN a component fails. Modern systems use a single control board, and separate modular devices... far better for the consumer.

[@richardsotnick6414]

I recently had a problem with my furnace. Pilot would light but main burners would either not ignite or they would ignite and immediately turn off. Checked flame detector, okay. Called technician and he condemned smart valve. I said thanks but no thanks. I investigated further and the problem was a high resistance multi contact thermostat. Smart valve was getting sufficient voltage to light pilot but not enough 24 V voltage to light the main burners. Changed thermostat and problem disappeared. Lesson is just because thermostat turns on exhaust blower, doesn’t mean thermostat is good. It may be high resistance. Jumper out thermostat to prove furnace works properly. Don’t assume thermostat is okay if blower comes on.

[@richardsotnick6414]

What I mean by a multi contact thermostat is a Honeywell Chronotherm with heat on/off switch, backplate wipers and main (mercury) contacts. There was just too much resistance in all these contacts.

[@jkbrown5496]

You can track the voltage drops in the readings he takes in the video. Starts with near 28v on R-C, then around 27.3 when the inducer motor starts and the relay coil is flowing current. Then the hot surface igniter kicks in, we see 16v quickly going to 23v, then 25.9v from the valve to the control board. I believe 22v is the lower limit for reliable operation of the gas solenoids. If the extra resistance drove the voltage lower when both the hot surface igniter and gas solenoid are powered for initial ignition of the flame, it could cause the solenoid to slip cutting off the gas, killing the flame even if it reopened. Even in the video we see the voltage on the hot surface igniter is 16v for a split second as it heats up, but that could be meter response and maybe the hot surface igniter is powered a split second before the gas solenoid to avoid those inrush voltage drop problems.

[@johnkirchner9979]

Or resistance on the hot surface ignigtor changes when it glows red

[@vongrayson9047]

The high efficiency units that use PVC for combustion gas create "water" from the exchanger rem,oving so much heat the moisture in the air" condenses" . The old school 80% efficient units that use meatl flue pipes vent discharge air hot enough to burn off the moisture. Until the metal flue pipe gets hot they will condense for a few minutes too.

[@joerice1372]

Craig do you have any videos on the recognition smart valve with the 120v ignitor? Ran across one the other day.. I’d love to get an idea of what that extra plug is!

[@thatnewsmananimated7677]

Great thanks Master

[@1commonsense934]

Great job explaining...I have a smart valve that is clicking repeatedly after flames are on..then will relight...also noticed that a small blue pilot flame with all power off ...what's your thoughts ??

[@own0805]

did you get this resolve? im having the same problem. i hate this smart valve

[@1commonsense934]

@@own0805 yes..the 2nd heat exchanger drain tube was cracked.. leaking water and air sealed it with duct tape.. working !

[@watermanone7567]

Excellent video. What kind of furnace was the smart valve on? I have not done many smart valves to really enjoyed the video. Many thanks.

[@clucknorriz6683]

Looks like a ICP, Tempstar.

[@nickrhine6403]

Will you be making a video for the direct ignition smart valve, ive been working on a lot of tube heaters and hanging garage units with the direct ignition valve

[@biblebloopers946]

1 question... After flame is proven through rectification, and the main gas valve opens, does the pilot flame stay on or does it turn off while your burners are going? Thank you

[@tomoliver8498]

Pilot stays on when main gas valve opens because pilot assembly is where the flame proving sensor is located.

[@Straycurrent]

A very helpful video- thanks for the training. I wonder what are the pros and cons about this type of intermittent pilot versus direct ignition of burners by HSI?

[@AIRCONDITIONINGSCHOOLING]

How does the main control board know there is a flame ? How doesnt it shut off while it runs?

[@astindersinghera766]

Well explained gas furnace operation and individual components functions. I have a question, my furnace intermittently cutting in and out with clicking sound before it fires up. Is this appear to gas valve issue and can it be repaired instead of replacing them. The gas valve is quite pricey. Thanks for your help.

[@chamberlain9268]

If anyone is here with the same problem I had. Honeywell Sv9541 gas valve does control the ignition sequence. If you are having inducer motor not turn on or flame its the gas valve and it may have a solid green light showing. I replaced control board first and it didnt fix issue.

[@ajkelly6135]

I have a sv9500m 2603 I have three wires yellow red and white how would I go about adding a smart thermostat

[@hedgewoodtv]

Can you confirm if the control board is responsible for initiating the inducer motor? My issue is when I call for heat my inducer motor won't even start. I've verified the motor is good, and that I have 28v between r and w. I'm about to replace the control board. But I'd like to know that it's not the smart valve not allowing the inducer to start also.

[@chamberlain9268]

Hey . If its a honeywell smart valve it will control the power sent to inducer motor. I tried a new board and it didn't fix problem. The gas valve has a solid light on and wont turn my fan on. Apparently its the gas valve and they are notoriously bad.

[@chesstime356]

Very nice I like your explanation... I am new to the field and I hope one day become good tech. I do watch your video from different accounts both under my Mohammad name

[@acservicetechchannel]

So nice of you

[@walteraustin288]

Been trying to find that type of style of flame rod surface ignitor but the model sticker fell off my old one

[@thefred0215]

Great Video yet again Craig. So once the 24v comes from the pressure switch, does that same voltage open the pilot valve?

[@SKRRTSKRRTx]

Hey Craig, I have this smart valve and I think the flame rod needs cleaned. Do you have to remove the whole assembly to access it?

[@kyleh1974]

Was there some perceived benefit of the smart valve system? Never understood why these even exist.

[@MindKontrolleProject]

What would cause the outlet/manifold gas pressure change over time?

[@ronaldfuhrer]

Why does my smart valve only open if I turn the switch off and back on again, then it opens and completes the sequence?? Do I need a new dumb valve ?

[@DaBorderhopper]

so my issue i have is the igniter glows but the valve isnt letting gas pass to the pilot tube i heard it clicking open but no gas passing through?.. everything electrical looks good everything works but no gas is passing through.. any idea what would cause this or is the valve definitely bad like im thinking.

[@APECK636]

Hey man I have a Gray Top smart valve I am trouble shooting. Inducer comes on, then quits I get 3 flashes. Which is a draft issue. I jumped the pressure switch circuit then the burners fired up. Going to use my manometer tonight and see what the draft motor is pulling. I need to rule out any flue obstruction too. Anything else I should check?

[@clucknorriz6683]

You could actually disconnect power to the pressure switch and hook up your meter ends on it and on the tubing that's connected to the pressure switch suck on it and see if you get a beep on OHM setting if you do that might tell you the switch is OK but then you'll have to use the monometer to check the pressure switch itself, otherwise check for obstructions in the B vent but I believe your problems linked to the pressure switch Does the fan motor run continuously when you turn on power to the unit

[@kamalnasari8632]

H N year ❤

[@EnjoyCalculus]

I still don't understand why the gas valve has 2 separate sources of 24v going to it (black and white as well as the blue)

[@orlandochairez7369]

So I have power going to my Hot Surface Ignitor but nothing happens I changed it and new one does the same. I have power going to it but it does not light. But I give it 24v straight out of transformer and it lights up. What am I missing

[@patrickjordan8373]

Anybody have a list of machines that do NOT have smart controls in 2022?

[@israelalessandro1239]

Very happy 😍💋 💝💖♥️❤️

[@danielbergey3358]

Why a smart vavle when you have the control board and all the normal wiring. Seems like they just want to jump the price a a 24volt valve.

[@zack9912000]

Smart valves are garbage, hence why no new furance uses them. Honeywell makes the worst gas valves

[@allykatt940]

first take off panel then put FAU in the trash

[@Rhahdhdn]

I hate these smart valves. So expensive when you have to replace them.

[@channelcatchaser9426]

$60 dollar ignitor.

[@zack9912000]

OEM cost more then that, 60 dollar ones are the universal

[@throttlebottle5906]

ahh, the most anti-smart, smart valve I've ever seen

[@timrob0420]

I hate those POS valves

[@tomoliver8498]

Smart valves suck