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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22514
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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My name is ***** *****. I have a Lennox 80UHG4/5-100A-3

Customer Question

Hi my name is ***** *****. I have a Lennox 80UHG4/5-100A-3 furnace. I just replaced the control board because the blower was not coming on. Now the blower comes on in A/C mode and FAN ON but not in Heat Auto mode. I just observed it when in Heat Auto mode and the igniter looked like it came on then shut off quickly about 5 times or so then shut off completely. The LED lights flashed slowly alternating after this.
JA: Thanks. Can you give me any more details about your issue?
Customer: I'm wondering if I need to clean the flame sensor or replace the limit switch. When we turn on Heat and leave the fan in ON mode, hot air never comes out.
JA: OK got it. Last thing — HVAC Technicians generally expect a deposit of about $18 to help with your type of question (you only pay if satisfied). Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.

I am very sorry your question has not been picked up yet.

I just logged on and found you had not been assisted.

Please let me know if you still need help and I will do my best. Please do not "Rate" as we have not worked toward an answer yet.

If you would like to proceed let me know by replying. Once again use reply..not "rate".