CGM boiler will not light

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  #1  
Old 05-15-02, 08:22 AM
gscottm
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boiler will not light

I own a Weil-McLain hot water CGM boiler, model CGM-5-PI with an intermittent ignition device.

When I turn up the room thermostat, the solenoid on the boiler clicks and the electric water valve controlled by the room thermostat opens. No gas flows, so the boiler does not light up.

I know there is gas to the gas valve on the boiler because the residential water heater works and it is on the same gas line, 3 feet away.

The boiler thermostat has been set to 180 degrees for years. I jumped the thermostat's 2 yellow wire connectors and the boiler still didn't fire, making me believe the boiler thermostat works.

What could be preventing any gas from flowing into the boiler?
 

Last edited by gscottm; 05-16-02 at 11:57 AM.
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  #2  
Old 05-15-02, 06:16 PM
ServiceGrunt
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Could be the pilot valve. It plugs into the side of your gas valve. It is about inch and a half square box that has 3 or 4 prongs on it and has a sensor that runs down to your pilot assembly. It allows the pilot to light and after a delay, opens up the gas valve which brings on your burners.
 
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