The display showing the temperature is flashing the temperature and then "P2" and then temperature and so on. What does the P2 mean?
Well, no, actually. P2 is an error related to the evaporator temperature probe. I would start with the electrical connections, the bond between the probe and the evaporator, and the evaporator fan.
Model and serial numbers helps a lot. This is probably a pressure error code. Look for a condenser being dirty, too much freon in system, condenser fan motor issue, unit exposed to a high temperature ambient. This is where I would start.
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