Walterc2 I'm not sure how GLENNCALVIN did his but I had a HVAC guy take my cover off and undo the gas line ,pull out the igniter and it was all rusty and a lot of the screen holes were rusted shut, There was moisture all over the circuit board and it would not let it start. I ordered a new board because he said it was probably shorted out and once I got it and installed it worked. We had to clean all the rust off the ignitor screen too. It rained two days later and I had to do the same thing.Put the old circuit board back in because it had dried out and furnace worked fine.
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