Williams gas wall heater - only fires when screws on valve jumped


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Old 01-19-24, 08:51 AM
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Williams gas wall heater - only fires when screws on valve jumped

The burner on my gas wall heater will only fire if I cross two screwdrivers between screws 1 and 3 on the valve. If I touch a wire to jump between the screws, the burner won't start. It only seems to work when I push the screw drivers in against the screws and cross them. I'm thinking I need to replace the valve because there is a loose connection at the terminals inside the valve? I have tested and it is not other components.
 
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Old 01-19-24, 09:17 AM
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Do you have an electrical diagram of the wall heater? Screw 1 or 3 must be valve power input. Do both screws have a wire attached?
 
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Old 01-19-24, 09:35 AM
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Can you provide the model number of your stove?

It also wouldn't hurt to tell us what type system it is. Does it have a standing pilot light? Is there a spark ignitor? Do you have a external thermostat?

I don't think you have a bad gas valve. When you jumper it and it starts you are showing that the gas valve works. You are bypassing the controls forcing it to turn on so I think the problem is something else, possible a poor connection especially if it's a millivolt system. Or it could a connection going to a thermostat or on/off switch or the switch is bad.
 
 

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