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 HVAC Guru Your Own Question
HVAC Guru
HVAC Guru, HVAC TECH
Category: HVAC
Satisfied Customers: 14020
Experience:  15yrs in the HVAC industry with certificates and degrees.
21107370
Type Your HVAC Question Here...
HVAC Guru is online now
A new question is answered every 9 seconds

My thermostat won't turn the A/C on. What do I do?

Customer Question

My thermostat won't turn the A/C on. What do I do?
Submitted: 1 year ago.
Category: HVAC
Expert:  HVAC Guru replied 1 year ago.

Does the fan come on when selecting FAN ON?

Customer: replied 1 year ago.
No, it doesn't
Expert:  HVAC Guru replied 1 year ago.

OK then you either have bad batteries in the thermostat or the fuse has blown in the control board inside the furnace. If you do not have a battery controlled thermostat you need to check the fuse on the board in the furnace or air handler depending on where you live.

Customer: replied 1 year ago.
I did change the batteries in the thermostat. How would I know if its the fuse?
Expert:  HVAC Guru replied 1 year ago.

You may have a bad thermostat, can you get at the wires to the thermostat? If so connect the RED(RH) wire to the Green(G) wire and see if the blower fan comes on...if so the thermostat is bad.

Customer: replied 1 year ago.
Nothing happened.
Expert:  HVAC Guru replied 1 year ago.

Ok if nothing happened you need to check the fuse in the furnace on the board. You will look for this in your furnace or airhandler...check the fuse on the board to see if it is blown. That will cause this issue.

CLICK HERE

Customer: replied 1 year ago.
does that mean there's nothing I can do myself?
Expert:  HVAC Guru replied 1 year ago.

Yes just open the panels on the furnace and get to the board it is where all the wires are connected to you can find it, you can remove the slot fuse yourself...it is just a 3 amp fuse remove it and check it.

Customer: replied 1 year ago.
I'm having trouble removing the slot fuse
Expert:  HVAC Guru replied 1 year ago.

It just pulls out, it may be just tight grab it with a needlenose pliers and pull it straight out.