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

Compressor not turning on (unless manually press contacter.

Customer Question

Compressor not turning on (unless manually press contacter. I tested the thermostat for 24v and zero when open. Appears the control board the (50A55-843 control board) is not energizing the compressor. How can I test control board for 24v?
Submitted: 2 years ago.
Category: HVAC
Expert:  BillyHvac replied 2 years ago.
do you have 24v between Y and C?