cpmfortmaker rpj2

Old 11-06-21, 06:05 AM
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cpmfortmaker rpj2

My furnace was working fine until yesterday, now it won't light. The ignitor wouldn't glow at all so I replaced it. Same problem, the ignitor won't come on. Any suggestions? Could it be the thermostat?
Old 11-06-21, 09:23 AM
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You didn't say what furnace you have so I can't offer specifics. But, you also have a control circuit board, wiring and connectors that could be the culprit.

I put a volt meter on the leads to the ignitor. Then turn on the furnace and see if it's sending power to the ignitor. If yes then it's a bad ignitor. If no then the problem is somewhere else upstream like a broken wire, loose connector or bad control board (which is often a cracked solder joint where the connector pin attaches to the circuit board).

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