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It could be any one of the following: 1. The fan motor is overheating and is shutting down on overload, which will cause the compressor to shut down via the high pressure switch. 2. The compressor is getting too hot and is shutting down via the thermal overload switch. You need to determine if the fan and the compressor both come on at the outdoor unit. If you are getting cold air inside the house, the compressor is probably running. It generally takes longer than 1 minute for the fan to go out on overload unless the bearings are shot, then the fan motor could seize up and shut the compressor down on overload. You should have this checked by an HVAC tech.

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Q: What is wrong if your AC blows cool for about a minute and then the outside shuts off and the fan just blows hot air?
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