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, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
Type Your HVAC Question Here...
Phil is online now
A new question is answered every 9 seconds

Fan stays on

Customer Question

fan stays on
Submitted: 10 months ago.
Category: HVAC
Expert:  Phil replied 10 months ago.


click here for the thermostat manual

There is a FAN switch at about 1 o'clock, be sure that it is not set to ON... but to 'auto'... tell me if the fan still stays on or not.

This can get pretty technical, tell me a lot about your technical skills so that I can coach you most effectively.

We can go from there.

Customer: replied 10 months ago.
no fan switch
Expert:  Phil replied 10 months ago.

If you have the skills to dig deeper into the electronic controls send me a photo of the wiring diagram glued inside the blower access door.

Use the attach files like for that to the left of your send button. I will mark it up with trouble shooting instructions, so far I suspect a bad printed circuit board.