General topics about all things heating, ventilation, air conditioning and refrigeration.
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I have a Goodman GUI075-3. The pilot does light, the flame sensor is not cracked or damaged, however the gas valve will not open. If I tap on the grey control module in the furnace, it normally will light. Sometimes it will work fine for days, other times, like tonight, I will have to go downstairs and hit it every time. Iam thingking it is a bad control module, but unsure. Any help would be greatly appreciated.