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Msarge
@comcast.net

Msarge

Anon

[Electrical] Gibson Heater

The small fan clears the air , the igniter turns orange and the gas fires up six blue flames. The flames stay lit for about 30 seconds, then the big fan turns on and blows for a few minutes and the flames turn off big fan keeps blowing. I have replaced the pressure switch and the heater works for 2 weeks and have the same problem again. I have replaced the pressure switch and the flame sensor. Can someone help also when this happens I get a code of three flashes. No model number just said on the inter door for 80+ & 90+