How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Phil Your Own Question
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
23932409
Type Your HVAC Question Here...
Phil is online now
A new question is answered every 9 seconds

My furnace comes on and the heaters come in, but when the

Customer Question

my furnace comes on and the heaters come in, but when the blower motor comes in the furnace heaters shuts off
Submitted: 1 year ago.
Category: HVAC
Expert:  Phil replied 1 year ago.

Hello,

So far it sounds like there might be a crack or hole in the heat exchanger, and when the blower comes on it blows air into the fire box and blows the flames away from the flame sensor.

Watch the burner flames carefully, notice the shape of the flames, how they look, the look for changes when the blower starts... if you see any change, the heat exchanger is bad.

Let me know what you find, we can go from there with no time limit.