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

Hey doug my ac unit cools perfectly fine, lets say i set it

Customer Question

Hey doug my ac unit cools perfectly fine, lets say i set it to 22 celcius. When my thermostat reaches close to that target tenperature there is a bumping sound coming from the unit in my basement. It sounds like the relay is clicking on and off a ton. They replaced the entire board twice. Not to sure what the issue is and its concerning me
Submitted: 2 years ago.
Category: HVAC
Expert:  Phil replied 2 years ago.
Hello, the bumping sound is the electric motor and compressor mounted on springs. that is *welded inside a steel outer shell.. when the power is cut off to the compressor the torgue on the motor is released and the unit moves on the springs and hits the side of the steel shell.That is more or less normal, especially if the unit is older, or is not sitting level. -------------------You will need to examine the unit closely in order to locate the relay clicking noise... I can coach you on that.