Having problems with Goodman gas furnace


Old 11-08-04, 08:05 AM
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Exclamation Having problems with Goodman gas furnace

I have a exterior Goodman gas furnace. it has an electronic ingnition mod. mounted on the regulator. The ignitor burns and the pilot light comes on, but as soon as the ignitor goes out so does the pilot light.The drafter runs constantly, after the thermostat kicks it on, and it looks as if that is causing the pilot light to go out before the burner kicks in. I think it is either a sensor fault or a clogged regulator, could someone verify?
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Old 11-09-04, 04:37 AM
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Could just be a clogged pilot tube. Clean it out good and also does this thing have a thermocouple sensing the pilot flame? That could be the culprit also.
Old 11-09-04, 06:39 AM
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Hello wjc1184. Welcome to the Heating Furnaces forum topic and the Do It Yourself Web Site.

Clean the pilot flame sensor element first. May solve the problem. A dirty sensor element, even though still being heated by the established pilot flame, looses the heat and drops the electrical connection. Cleaning the element most likely to solve the problem. If not, replace the sensor.

Next possible cause, if sensor replacement does not resolve that condition, the module sensor is connected to may be defective or the grounding to it is bad. Remove green (usually green) grounding wire, clean surface wire is attached to and the terminals end. Use fine grit sanding paper to clean the painted area where the terminal attaches to metal frame of furnace. Reattach terminal and retest. Might resolve the problem.

If nothing above done solves the problem, module and sensor may be defective. Or the pilot solenoid valve inside the gas control valve is defective. Internal part of the gas valve. Non repairable. Must replace entire gas control valve.

Many other possible causes could exist. May not be any of the above. In the long run, replacing parts which do not solve the problem, might be a good idea to have a pro make the needed repairs. Less costly and time consuming in the long term. Your choice.
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