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Williams wall furnace, top vent.

The pilot turns on and works fine but when the heater reaches the desired room temperature and the unit turns off, so does the pilot light.

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  • Anonymous Dec 14, 2007

    the pilot wont stay on

  • Anonymous Dec 15, 2007

    I relit the pilot it worked for alittle bit,but went out.Then I changed the thermo-coupling relit the pilot worked for alittle bit and went out.I noticed the flame was flikering at this point.What can I do to fix my wall unit?

  • Anonymous Mar 19, 2014

    my heater will turn on fine, then it will cut off before the desired temperature is reached and code 88 will show on the display.



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I've replaced a Williams wall gas heater non-electric. The thermostat is connected right and mounted on the wall. But, there's a thick black copper wire on the side of the furnace tagged thermostat. I don't know what to do with it? Where do you connect this wire? When it touches the top screw of the three screws running vertically(where the other wires are connected). The burner lights up and stays on, even if you play with the wall thermostat. Touching the other two screws doesn't do anything. Now, the manual talks about connecting it to the venting wires? Extra wires coming from the top or maybe somewhere else in the wall? I've left it connected to the first screw, ran the heater. But, it never turns off? Any suggestions? Thanks

Posted on Feb 23, 2008

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Is this an old heater? If so the burner may be in bad shape so when the thing turns off it is blowing out the pilot flame. You happen to notice a whooshing sound when the thing goes off?

Posted on Dec 18, 2007

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If the flame is flickering then the pilot is clogged, it probably needs to be cleaned in order to get a proper flame to the thermocouple. The flame should be constant and blue not yellow at all.

Posted on Jan 03, 2008

  • tigermark76
    tigermark76 Jul 23, 2013

    When its operating it works perfectly its only when it reaches temp and tries to restart that it needs to be reset


If your old furnace is faulty replace the unit for safety and efficiency. it will pay for itself in energy.

Posted on Dec 20, 2007

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