YOU DON’T HAVE POWER
If your compressor and condenser (located on your outside unit) don’t have power, the air conditioner blows warm air. A blown fuse or tripped circuit breaker kills power to the HVAC system. It could also occur if the emergency shutoff switch is hit accidentally. (Learn more about where to find these switches here.) If your outside unit isn’t turned on, you’ll end up with warm air blowing through the unit.
THE THERMOSTAT ISN’T SET PROPERLY
File this one under #HVACFails.
You’ve probably checked this, but is your thermostat set correctly? If you’re in heating mode rather than cooling, you’re going to get warm air. Make sure that your thermostat is in the proper mode and that the temperature is correct. While you might feel silly, this is one of the easiest problems to fix!
How Do I Fix My Air Conditioner?
The fix, of course, depends on the problem. If you’ve checked that your thermostat is properly set and that your unit has power, the next step is to clean the unit. Change the air filter. Brush any debris away from the condenser coils and hose them down. Your outside unit needs at least two feet of cleared space around it.
If your AC unit is blowing warm air after these DIY fixes, it’s time to call in the experts. You may be low on refrigerant or you might have a refrigerant leak. The condenser could be failing. Your compressor may not be working properly.
Remark：
Some of the articles are taken from the Internet. If there is any infringement, please contact us to delete it. If you’re interesting in heat pump products，please feel free to contact OSB heat pump.