Why is my air conditioner unit only running properly on cool days? when its hot out it only runs about 5 mins at a time then shuts off to fan and dont come back on for another 20 mins
This is the first summer ive had this problem. the 3rd summer ive had the unit. i would think it would be the other way around runs all day when its hot and runs periodically when its cool. however not the case
Heating & Cooling
Answers & Comments
The outside fan has to run to cool the condenser unit
that electrical motor is controlled by start/run capacitors ,in the outside unit
if that fan is not running then the head pressure in the compressor will be exceeded and the compressor is shut down
call a technician to check the system and that fan is running
Do you hear a click sound as the compressor shuts down? If so that is the clixon (heat sensitive circuit breaker) that is opening and shutting down the compressor when it overheats. You have not had the AC filled with refrigerant so overfilling the unit cannot be an issue.
And if it is not overfilled overheating is caused by excessive current going into the motor which could indicate a problem with the motor windings..
OR, If the thermostat is faulty it could be prematurely shutting down the compressor. If you jump (bypass) the therm and unit does not shut off then you have found the culprit.