Question about Goodman GMS90703BXA Heater

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GMPN120-5 Furnace First of, old thermostat is installed. It was blinking and I replaced the battery. The reason I found out was it kept turning on/off. Second, thermostat is working and the fan comes on but not the heater. It goes thru a cycle. I adjust the temp. -> it clicks and heater starts but the burners won't come on. It works for about 20 sec. and then stops. Fan works but no heat.

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Here is a tip that will help you try to figure out why your furnace is not working.

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heatman101

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