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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8253
Experience:  Furnace, A/C and heat pump specialist.
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I have an old Lennox Model # G20q5/6e-150-1 where the damper

Customer Question

I have an old Lennox Model # G20q5/6e-150-1 where the damper motor is inoperative. The previous owner of the house showed me how to place a weight on the damper in the open position to get the furnace to fire. Mind you, I have all new a/c & heating equipment sitting in my garage ready for my installer to swap out equipment next week. However it is very cold in the house. When I manually open the damper, the pilot lights and the burners light for only 3 seconds. I'm thinking the flame sensor is dirty but I have no idea where it is to clean it. I'm hoping it is the sensor so we csn hsve heat for a couple of days. Can you help me with its location? Thank you. Mike
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: Yes on the thermostat. There is no air filter.
JA: Do you plan on doing the work yourself?
Customer: Yes.
JA: Anything else we should know to help you best?
Customer: No.
Submitted: 9 months ago.
Category: HVAC
Expert:  airheatman replied 9 months ago.

Your flame sense rod on this one will be right below the pilot. See below: