Unit Won't Cool Or Heat Just Blows Air and Displays FP

If your system starts to blow cool air when your Nest thermostat is in Heat mode (or if it blows warm air when its in Cool mode), change the settings for orientation of your heat pump. The instructions depend on which thermostat you have

model number? Heat pumps tend to blow cooler air than a space heater unless in money-gobbling mode.

The AC unit outdoors must be running and rejecting heat by its air flowing through it the 2 copper lines are the refrigerant lines, the fatter one should be "beer can cold" if not its low on refrigerant or not running.

the wall stat maybe bad. or wires to remote stat may be shorted

Hello, check the thermostat wiring between the indoor unit and outiside unit and make sure it is secure. Also check the contactor coil on the outside unit and make sure none of the wires are loose and touching metal. You csn also unhook the wires and put them back one at a time and see which one blows the fuse.

Short of gas. Time to call a technician

dear sir

please reset you air conditioner by it,s remote to heat mode and check thermostat setting maybe it has been turn off after remove air conditioner,s electric supply plug from electric source . i hope after reset it will be able to work again.

hope answer the question
thank you
please vote!

I was wondering the same thing about our unit until I found the specs online and read that it has freeze protection. When the temp goes below 40 degrees, the fan comes on to prevent damage to the unit.

Unplug the unit with all controls off, then plug back in and wait 5 minutes before turning on switct at unit. Good luck