Air Conditioning and Coolant
Heating Ventilating and Air Conditioning

Why would the central ac blow cold air for about 30 minutes then start blowing hot air but the unit isn't frozen and is full of refrigerant?

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Wiki User
2006-08-29 17:59:21

It could be that the unit is overcharged and the compressor is

shutting down on overload. Check to see if the compressor is

running when the hot air starts blowing.

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