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Pilot light will stay lit Lennox G8D2-82

Pilot light will not stay lit Lennox G8D2-82

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You may need to replace the Thermocoupler. It screws into the gas regulator and the sensor end is set in the flame of the pilot light. You can get one at any appliance parts store. The Thermocoupler simply feels the heat of the pilot light and sends a very small amount of voltage to the gas switch that opens when your thermostat calls for heat. If the pilot light isnt lit, no voltage from the sensor and no gas can be released by the regulator.
Anyone can replace one. Just find the tip that sits in the the pilot flame when you try to ignite the pilot light. Follow it down to the regulator and unscrew it. There is no gas involved. It is Ultra Low Voltage. No danger.
Be sure to turn off the power to the unit before you begin removal. Take it to the parts store along with your furnace brand and model number. If you see any identifiers on the regulator, note them and take them with. When you replace it be sure to have the sensor end up in the flame of the pilot.

Posted on Sep 29, 2009

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I changed the thermo coupler and the pilot light does stay lit but the burners won't light


If you are referring to a gas fireplace:

  • Make sure the pilot knob is turned from "pilot" to "ON" or it will never run.
  • If the pilot knob is "ON", and the pilot is lit, but the burner won't light, it could be a bad Thermopile. The thermopile is the other safety mechanism in the pilot assembly that controls the burner.

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Lennox furnace model G11Q3-110 v.2 burners light but go out before fan comes on


Troubleshoot an ignition problem on a Lennox gas furnace ...

? 2:44
https://www.youtube.com/watch?v=yXIxgzwMkPs
Nov 17, 2012 - Uploaded by grayfurnaceman
This furnace should light its pilot with a spark then the pilot proves its on ... Troubleshoot an ignition problem on a Lennox gasfurnace .... Pilot and no inducer but is the same model as that great video! ... You probably have dirty burners. ... How do you know spark module is not sending 24 volts to mv and pv ...

Lennox Furnace Model G11Q3-82-2 - RepairClinic.com



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I have a Marco gas fireplace model# 794019C. It is the millivolt pilot generator type. I first changed the thermopile and cleaned the spark ignitor to get it to light. I have checked continuity and...


Mike, I suspect that the problem you're having is not related to the new Thermoplie (Pilot Generator) you installed. Its with the Thermocouple. The clue was "Some of the time its hard to keep the pilot light lit". The Thermopile controls the opening and closing of the gas valve, when the wall switch is turned ON/OFF. The Thermocouple, is what keeps the gas valve open and pilot light lit all the time. If there's no flame heat on the Thermocouple, it closes the gas valve. Rather than replace it, you can try polishing it with some very fine sand paper, then wipe the tip with a cotton ball soaked in alcohol. If the Thermocouple is really pitted, don't attempt this. Just replace it. If you do replace it, when you make the connection to the gas control valve, finger tighten the nut, then tighten only 1/4 turn more with the appropriately sized wrench.

By the way, MARCO is no longer in business as MARCO Fireplace. It was purchased by Lennox Hearth, a division of Lennox Heating. And your model firsplace is no longer manufactured. If you continue to have problems with it contact Angie Parrish at Lennox via email angie.parish@lennoxhp.com.

Hope this helped you solve the problem. Please be kind enough to rate my response to you. Thanks and have a good day!

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While holding down the control knob for the pilot, you either have to use the pilot ignitor or match light the pilot. Then old the knob in for 60 seconds, before releasing it. If the pilot remains lit, turn the control knob to ON. If the pilot does not remain lit, the Thermocouple or Thermopile may need to be replaced.

Hope this helps you to solve the problem.

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I have a readyheater model 65-85 the flame will not stay lit im thinking thermal couple is there a way to test this part? or could it be another problem?


If your pilot light will not stay lit when you release pilot light button then chances are that your thermocouple is bad. Make sure that the tip of thermocouple is directly in line with pilot light. Tip of thermocouple should be cherry red if it is properly placed. If pilot will not stay lit then replace it. If you aren't sure about placement of thermocouple you can heat thermocouple with a seperate heat source. If you do this and pilot light stays lit then reposition thermocouple in pilot flame. If it still won't keep pilot burning then replace thermocouple. Hope this helps. Thanks.

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I don't know how to restart my old bosch water wizard 10p, pilot light has gone out.


get a long stick match, a flashlight remove lower inspection cover, find thermocouple and pilot light will be next to it,turn gas valve to pilot light and hold down,stick the match in by thermocouple till the pilot lights and hold valve down till pilot stays lit,this may take a minute or more,then release gas valve and see if pilot stays lit, if not retry,if it wont stay lit,the thermocouple is defective and needs replacement

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Can't find instructions on lennox gf 8 series furnace


Does it have a standing pilot light? On new units, there is an igniter and not a pilot. But if you have a standing pilot, you will move the gas valve to "pilot" and push down the red button while holding a flame under the pilot located by one of the jets. Once it lights continue to hold the button down for a minute or so and then release the button. The pilot should stay lit. Then turn the dial to the on position. That's it.......... If the pilot won't stay lit then the thermocouple is bad and needs to be replaced.

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