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Manage My Life

If the pilot stays lit on a wall furnace, why won't the heater light when turn on thermostat?

by Manage My Life Last activity date:
March 1st, 2012

I have a williams furnace, gravity vented wall furnace, natural gas and the pilot light is lit- and remains lit. However, no matter setting I adjust the wall thermostat too the heater will not light at all.

Building Supplies
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Answers (3)
Manage My Life
Mine (Williams 5009622) did the same thing and, after a couple of hours of research, found the answer to get mine going. What I had to do is: 1) Unscrew 3 mounting screws (1 on top and 2 on inside bottom by gas valve assemply) and pull cover/housing back. 2) Turn on thermostat. 3) Press/hold RED reset button (upper top left side of heater assembly; two wires were connected to it) for about 2 seconds. It immediately fired up. I hope this helps.
by Manage My Life
March 1st, 2012
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scott d
Thank you for your question. I can understand your concern about the heater not working. The 2 most likely problems will be the thermostat or the gas valve. However, depending on the model, it may also be the transformer. If the thermostat only has 2 wires to it, you can use an insulated jumper to jump the 2 wire terminals and if the flame comes on, the thermostat will need to be replaced. I would recommend having a technician check and repair this if the thermostat appears to be ok. I hope this will help you.

If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:

Sears Home Services

by scott d
November 15th, 2011
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Manage My Life
I know this type of information can be very helpful for you to have. While you are waiting for your expert answer, I did some research on the unit. I was unable to locate information that would be helpful with regards to your question at this time. Your expert will answer within 24-48 hours with detailed information. Thank you for using Manage My Life.
Answered in 4 minutes
by Manage My Life
November 11th, 2011
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