I have an old Carrier Heat Pump, I think a 50QT model. Now that the temps are in the 90's up in Boston I've set the thermostat at 74 F. (It might be around 82 F in my apartment.) I set it to COOL and the fan is set to "Auto".
It will blow out cold air for about 2 hours but then it begins to blow out luke warm fan air, it will continue to do this until I turn it off. I've tried turning the thermostat down to 70 to see if that will kick it back in but that doesn't work. ( I have another thermostat telling me its 78 in my apartment.)
What I've done is then turned the unit from COOL to OFF. Wait about 1 minute turn it back to COOL and then almost right away it begins to blow out nice cold air again.
Any ideas on why its doing this; and not settling on a tempature? I almost feel like its the thermostat but I have really no background in this field. I've called to get an estimate on a replacement and I've been quoted over $5K.
Also there have been a few times where I've just turned the unit on to COOL and I just get Fan air not cool air. When this happens its similiar to the above in that I switch it off; wait and then turn it back on to COOL and then it works.
I know its old but I had it serviced back in December and the tech said it was in good condition.
Anything I can check on my end? Something I can do myself before calling for service?
Thanks in advance.