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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 8429
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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How does this Q/A work, a couple of months but the problem

Customer Question

hi how does this Q/A work
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: a couple of months but the problem is intermittant
JA: Do you plan on doing the work yourself?
Customer: not sure. depends on the problem
JA: Anything else we should know to help you best?
Customer: no
Submitted: 10 days ago.
Category: HVAC
Customer: replied 10 days ago.
On the hottest days, the outside compressor stops unexpectedly while the rest of the system still thinks it is cooling.
Customer: replied 10 days ago.
The fan and system continues to run and eventually the compressor starts up again (usually for 5 minutes or so) then shuts off again
Customer: replied 10 days ago.
i did a little troubleshooting and shut off the breaker to the compressor. Upon reengage, the fan starts for 1 second and then the compressor stops.
Expert:  Phil replied 10 days ago.

Hello, the compressor is over heating due a dirty condenser coil most likely (dirt is deep between the fins where you cannot see it) Click here for a video on how to clean the condenser. you can buy the AC coil cleaning kit at most larger hardware stores.


I am a retired mechanical engineer and HVAC/ electrical/ refrigeration and boiler contractor ... with 56 years in this business. The last 20 of those years consulting for major firms nationally.


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If you can agree to that, rate now, lets continue by all means.