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

I have an older York a/c /heat pump unit.When using the heat

Customer Question

JA: Hello. How can we be of help?
Customer: I have an older York a/c /heat pump unit.When using the heat it seems the compressor goes into defrost mode to much.When this happens the vent fan (up in the attic) keeps running blowing really cold air until the compressor comes back on.Please.
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: Changed filters.Fan is set on auto.Should the fan run during defrost cycle ?
JA: Do you plan on doing the work yourself?
Customer: I would like to if possible.
JA: Anything else we should know to help you best?
Customer: I had an auto electric shop for 30 yrs so I'm pretty handy
Submitted: 10 months ago.
Category: HVAC
Expert:  Brian HVAC Guy replied 10 months ago.

Hi I'm Brian and I'm here to help!

Can I get the model number of the outdoor unit please? This will help me to know what type of defrost control you have in your heat pump and help you determine why it's defrosting so often.