Roof top coleman AC/heat pump is blowing out hot air instead of cold. Are there a series of troubleshooting procedures that we could use to figure out what needs to be replaced? Unfoturnately neithe...
When you turn it on do you hear the hum of the compressor? You should hear it a few seconds after turning unit on. It it is not running make sure thermostat is turned cold enough to make it run. If it is running and no cold air, could be that refrigerant leaked out.
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