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Can't keep pilot lit on a 2 year old 35,000 btu gas furnace

I am commited to the idea that it is the thermal couple but and am prepared to change it out but it looks like their is know easy way to get to the end that is near the flame. can you give me directions on the best easiest way to accomplish this task. the funace again is a wall mounted williamsgas furnace

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You need to test the thermocouple, to test a thermocouple, you heath it up, and at the same time read voltages and continuity at the terminals using a multimeter.

Posted on Dec 09, 2008

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2 Answers

My pilot light will not stay lit. It lights and stays lit as long as I have the knob pushed in. As soon as I release the knob, the pilot goes out. The heater hasn't been used for at least 2 years.


The thermocoupler is shot. Its the little probe the flame keeps warm. It supplies .3V to the gas valve to keep the gas flowing. when you get one it would be a good idea to get two and leave one in the furnace compartment as a spare. remove the old one and measure the length of it as they come in different lengths. its ok if it is longer. I sometimes prefer a longer one because it makes it easier to install

Jan 06, 2015 | Heaters

1 Answer

When I tried to light my furnace, the electrical wires from the thermostat don't spark all the time, therefore my furnace won't stay lighted. What can I do to fix this?


Is this an older furnace where you have a pilot light? Are you saying the pilot light will not stay lit? If thats the case then likely you need a new thermal couple. That is what the pilot light keeps hot while it stays lit. It is a safety device that is there so your furnace will not come on if there is no pilot light present. Very common. Hardware store item. Need Furnace's make and model #'s.
If this is an electronically controlled furnace, you will need a service call.

Jan 13, 2012 | Heaters

1 Answer

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.

Nov 19, 2010 | Reddy Heater-30-55,000 BTU Variable

1 Answer

Is it possible to find parts for old Coleman floor furnaces? I have a 35,000 BTU, Colman Super Performance gas furnace model 22. It's old but operates great. My concern is on the cracked glass in a...


Dear Sir,
That glass inspection cap is not made anymore, and it is very dangerous to operate with out one in place. Many people are in the same spot as you are.
I have had success working with glass companies, they can make a glass piece out of glass that can withstand high heat, it is time consuming and expensive, so you will have to shop around, but it can be done, but not for cheap.
Those old floor furnaces can heat so nice, Just for the information these floor furnaces are still being made, though they heat a bit differently as they don't get as hot, just a new code put into place, to keep children from burning thier little feet.
"Cozy" is one of the new manufactures.
I hope I have answered your questions.
Sincerely,
Paul Gibson

Mar 30, 2010 | Coleman Propane Forced Air Heater...

2 Answers

Hot water heater will not light. Pilot lights but keeps going out when button released?


Could be the thermal couple is not working properly and or the pilot needs to be cleaned. Make sure you
dont have a backdraft condition. External Fan operating, plugged vent or down draft caused by wind.

Make sure you turn the thermostat up high, light the pilot and once it is lit turn control as fast as you can.
Be prepared if this works you could have a high
flame inches from your body.

Try cleaning pilot and making sure thermocouple is
properly inserted

Jan 18, 2010 | Heaters

3 Answers

I have a williams wall furnace model 5009622,and the pilot will not stay lit ,i cleaned the thermacouple,still no luck,i also then replaced thermal couple still wont stay lit,any other ideas thanx ,i was...


Assuming the pilot is clean and sharp. Before replacing the valve, clean any spade connections, those going up to the spill switch in particular. Clean and tighten all 4 connections. Good luck.

Jan 11, 2010 | Williams 2509612 Ceramic Mid-Size Heater

1 Answer

Garage furnace (standing Pilot) pilot stops after 30 mins.


it sounds like the afc the fan control not working could be dust on the afc

Jan 10, 2010 | Dayton Gas Furnace Heater

1 Answer

Coleman Gravity Floor Furnace need millivolt gas valve & pilot ki


Go to www.grainger.com and look for a "power pile generator" this is a millivolt thermocouple that may be just what you need to make your heater work again

Nov 12, 2009 | Heaters

1 Answer

Won't stay lit


here is a site that sells parts http://www.thoseheaterguys.com/1933204.html here is a manual and parts list http://www.rentrain.com/library_files/400.pdf . hope this helps.

Dec 16, 2008 | Heaters

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