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Concerns honeywell gas control valve and thermopile.

I installed a new honeywell gas control valve #100112706 and thermopile #100093984 because the old control valve was flashing a 2 code so I went ahead and replaced both items. The pilot light will light and then the birner will ignite but won't stay lit over 15 seconds then slowly go out. The new control valve still flashes the 2 code. The new themopile checks out at 750ma in about two minutes. What else could the problem be?

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  • Master
  • 567 Answers

What does 2 flashes mean ?.
Maybe the controller is bad

Posted on Apr 06, 2019

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 68 Answers

SOURCE: ifs40 w/ new thermopile

If the pilot shuts off within seconds of the burner, I strongly suspect you are having a problem with the hi-limit circuit. Check your wiring. The slightest unwanted grounding will cause the valve to drop out.

You also need to inspect the mounting of the bulb for the high limit. Make sure it isn't covered in debris. It should be clamped close, but not touching the heat exchanger. Grease needs to be able to flow on both sides of the bulb.

You'll need to test the switch with a meter or a jumper (for TESTING ONLY!). Remember, the hi-limit switch may be doing it's job and be the symptom, not the cause. But if the switch is tripping open prematurely, you'll need to replace it. (Part# 1177) Are you testing with enough oil in the vat?

Posted on May 31, 2008

  • 1 Answer

SOURCE: pilot light not staying on

Has the hi-limit been checked?

Posted on Nov 19, 2008

  • 1214 Answers

SOURCE: pilot wont stay lit installed new gas valve and new thermocouple

Is this a standing pilot furnace, or electronic igniton?

If standing pilot, does the heater use a fan to blow air through the heat exchanger?

If the answer to those questions is yes, then check that the pilot orifice is not partially plugged and that there is a strong pilot blowing against the thermocouple. If there is, replace the thermocouple. If not, check the orifice again, and check that the inlet screen to the gas valve is not filled with gas line trash.

If the the pilot flame is good and it continues to go out, the thermocouple magnet in the gas valve may be weak. Replace the gas valve as to get just the magnet and coil is not easy.

Reply back any questions you may have.

Posted on Jan 28, 2009

john224
  • 1378 Answers

SOURCE: Pilot wont stay lit when i release push down button on gas valve

Are you certain you are connecting the generator to the correct terminals? Is the pilot head partially blocked not allowing the flame to reach the generator even though the pilot is lit? Can you read the millivolts on the generator leads? Is the reading 400mV or higher? I assume it will be with a new generator but if it is not then the flame is not across the generator as it should be. If it is, be certain you are connecting the two leads properly and in the correct order. The generator has polarity so it needs to be connected to the valve properly. The tag up inside the heater should give you the correct locations for the white and red wires on the valve.

Posted on May 29, 2010

  • 1033 Answers

SOURCE: Gas furnace with Honeywell smart valve code error

Hello, it sounds like your Furnace might be shutting off due to your high limit switch.A limit switch will open when the furnace overheats due to low airflow, . check air filter, clean blower wheel, and check to make sure the blower wheel is running at proper speed and not dragging sometimes cause by a weak capacitor. Anything that restricts airflow will cause a limit switch to open.

Posted on Mar 08, 2011

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1 Answer

Need some help. I rebuilt my old wall heater and it won't turn on. New thermopile, pilot and gas valve. The pilot works, but burner won't ignite. New thermostat too.


turn thermostat to off position check wires from thermopile to stat and gas valve for damage etc . Thermopile has to warm up and make 600 mille volts to work . Try this then open stat and see if it fires up .

Dec 05, 2016 | Heating & Cooling

1 Answer

Is the honeywell wv8840B1109 like a smart meter. I was concerned after they installed this on my new water heater. It's basically an alarm for if the pilot shuts off. Seems awfully big to just be for that....


Thanks for photo link. Not a smart meter.
Just ordinary water heater gas control valve, with small circuit board to support error codes:
Copy following link for handy resources:
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent
http://www.thetankatwaterheaterrescue.com/forums/forum3/
http://waterheatertimer.org/How-to-replace-Honeywell-gas-control-valve.html
How the newer gas control valves are different: Old water heater had thermocouple which supplies very tiny current to gas control valve. When pilot light blows out, the thermocouple no longer sends tiny current and gas control valve shuts off gas to heater.
New gas water heaters have thermopile (just like modern furnaces and stoves), which is basically several thermocouples bunched together. So thermopile sends more current to gas control valve, and supplies enough current to power small circuit board. The circuit board records error events and issues simple error codes. If pilot blows out, then thermopile no longer sends current and gas control valve shuts off gas to heater.
Moreover, the new gas control valve can be repaired and replaced without removing from tank. So tank does not have to be drained... saving time and repair cost.
Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Aug 09, 2013 | Water Heaters

1 Answer

How to check a thermopile generator


Log in to the Honeywell internet site and ask the question using yur model generator! It is probably supposed to produce a spark that may be regulated.

Dec 24, 2012 | Honeywell Q313a 750 Millivolt Thermopile /...

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Honeywell WV8840B1109 temp control valve on water heater. Status light @ 4 blinks between 3 seconds indicating "high temperature shutdown" even though lighting pilot with water cold. .


II have exactly the same problem: Honeywell WV8840B1109 temp
control valve on water heater. Pilot is on, but the burner won't
no matter how high I turn the temperature knob. Status light blink
4, which by the controller is "high temperature shutdown" and has
nothing to do with the problem. The real problem is that the
computer chip in the controller has gone bad. Problem is solved by
changing a new gas control valve/thermostat. The old Honeywell
control valve uses pure mechanical stuff and was very reliable,
almost never has a problem. I don't understand why they switch to
this new electrical one which use the tiny voltage generated by
the thermopile to run, easy to break, because of the electric
chips, and is more expensive. The only reason I can think of is
that they want to get more money from our pocket.

Nov 01, 2012 | Water Heaters

1 Answer

Poilt is very week and will not open gas valve


The reason the control valve is opening slowly is the the Thermopile needs to be replaced. The Thermopile generates millivolts of electricity from the heat of the pilot flame, which then opens the gas valve when heat is called for. Also, check the pilot flame to make sure it's engulfing the thermopile. If it's not the pilot needs to be cleaned.

The Empire Comfort Systems, Thermopile part number is 672063

If I can be of further help, please let me know through the leave a comment link.

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GAS FIREPLACE


Yes, hopefully changing the thermocouple (skinny sensor) or thermopile(fat sensor) would do the trick.
Start with these fairly inexpensive repairs first.
Unfortunately if the honeywell valve is bad a new one can be expensive.
Also it is hard to order parts from Majestic, they just went bankrupt, not to long ago and Martin is taking them over. You might look for your valves model# and check online for other suppliers of that model# or ask for a compatible Direct Vent gas valve that's not as problematic. (eBay and HVAC dealers, etc.)
FYI:
You said it's been about 5 years, you might decide it's less of a hassle to have new gas fireplace installed. Martin and Empire are probably two of the best, with 5 year parts and labor warrantys.
Hope you find some success in your endeavor.

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if you changed the thermopile and still have the same problem make sure that the sensing bulb is directly over the flame. If it is and the thermopile is installed correctly the next thing would be the gas valve.

Hope this helps

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