The compressor on my portable A/c started shutting off about every 10-15 mins. it will blow cold air then blows warm for 10-15 mins then kicks back in again. is this an expensive problem to fix? whats causing it?
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Re: poetable AC compressor licks in for 10 min
It is probably either the high pressure switch or the frost control. The high temp switch usually trips because the condenser coil is dirty which does not allow it to exhaust heat very well. The frost control will trip if the system gets below 39 degrees on the pipes. This is usually do to low refrigerant or dirty filters. Good Luck!
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if the sensors are okay, it might be the compressor overheating, my portable ac (moretti elite ac) is also behaving the same, especially when i turn the fan to max. the compressor shuts down about 7 mins and turns on again in about 5 mins, now i found out when i turn to medium or low the compressor runs normally. i think when on medium or low setting some of the cool air directs/channels to the compressor thus cooling it more.
My central AC unit decided to stop on the hottest day of the year. It would start and run normally for a few minutes and then the blower would shut off. After checking the breakers, thermostat and overflow shut off (did not have one) I saw something about a blower motor capacitor. This was easy to get to and replace and my last hope before waiting for someone to come fix it. The capacitor cost $4.04 with tax and had my AC working again. Needless to say I was beyond happy. I hope this can help others with a similar problem.
Check the fan,to make sure it is really turning fast on the high mode with ac on,not just fan.It sounds like the fan is slowing down,and not cooling the condenser,therefore cause the head pressure to rise,and producing warm air.The fan motor would have to be replaced to fix the problem if this is the case.
See if you can reposition the thermister on the facing of the evaporator coils. That could be it or the thermister might be bad. They don't use copper/mercury sensing bulbs these days. They use these cheap thermisters.