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

My thermostat is not registering any info. I have changes

Customer Question

My thermostat is not registering any info. I have changes the batteries several times.
TH51110D1006 1207 It's a Honeywell that's about 10 years old.
Submitted: 11 months ago.
Category: HVAC
Expert:  Phil replied 11 months ago.

Hello, if you have the technical skills to check for 11-19volts AC from the red wire attached to the thermostat and the frame of the unit we can determine if there is a blown fuse inside the air handler/ furnace etc or if the thermostat has gone bad.

Let me know about that, we can go from there.