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The above heater is new and I just installed it. The main burner will not light but the pilot light is lite, I have tried 2 therostates and but the main burner still will not lite. What are some possibilities why the problem is happening.

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  • borlepg Nov 06, 2010

    This heater is a williams gas space heater model no. 2001622

  • borlepg Nov 06, 2010

    The heater is a william gas space heater model no. 2001622

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  • Master
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I would check for continuity on the gas operator valve. An open operator is a bad gas valve. I would look for 24 volts getting to the operator solenoid. If no 24 volts then look for an open roll-out limit somewhere in the circuit. NOTE: If this gas valve is a milli-volt type then I know exactly what your problem is: You generator is weak. It will hold the pilot but won't operate the solenoid. You would need to replace the pilot generator.

Posted on Nov 06, 2010

  • Dan Webster
    Dan Webster Nov 06, 2010

    What kind of dang heater is it?

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1 Answer

Not light


check to make sure that the poilet lite flame is touching the tip or top of the thermocouple.
the pilot lite needs to heat up the thermocouple so that the thermocouple opens the gas to the main gas log. a cold thermocouple shuts off the gas to the main gas log or gas burner and a hot thermocouple opens the gas to the main burner.
the pilot lite flame must be touching the thermocouple to heat it up.
pilot lite orface needs to be clear to let the pilot flame gas through with enough pressure so that the little flame can reach & touch the thermocouple. Pilot lite gas feed tube must be clear to let gas through. Use compressed air or a fine sewing needle, or even carb cleaner to clear out orface hole and gas feed line to pilot lite.

important!! WARNING:
if you use carb cleaner,make sure all the carb cleaner is dry,soaked up with paper towell or kleanex tissue and blowed out with compressed air , because carb cleaner can burn just like gasoline; so any carb cleaner must be compleatly gone before you attempt to lite the pilot lite.

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usually the small opening on the burner that 'points' to the pilot light will get clogged with cleaning soap or spills. Look carefully (the burner may be very easy to remove for inspection. There should be a small hole on the side pointing toward the location of the pilot light. It will be lower down than the main burner openings. Clean it out with a wooden toothpick.

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1 Answer

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If the pilot flame is not strong enough, it will not tell the gas valve to open, or if the gas valve is not getting the signal to open, it won't. Check all wire connections at the thermostat and gas valve. Check ground wires. Clean the pilot light and flame rod.

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