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Have a williams 465fa pilot lights but the heater wont kick on. Tested thermostat but still no heat.

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There is a sensor right above the pilot light. Your pilot light might be on, but your sensor is not seeing it as being lit and will not allow the heater to come on. You can pull that sensor off and clean it with fine emery cloth or just go buy a new sensor. The cost of the sensor shouldn't be more than about $20 bucks.

Posted on Sep 28, 2010

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Posted on Jan 02, 2017

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