Why does my heater turn on but not my AC?

Why does my heater turn on but not my AC?

Malfunctioning Blower Motor If your furnace turns on but doesn’t move air, there may be a problem with the blower motor. Most furnaces will have a small light that indicates the motor is operating normally. If the light is out, the motor may need to be replaced by a professional.

Why does one thermostat not turn the AC on?

The same thermostats control the heat. One thermostat is the master meaning that it must be set cool to push the system to ac. Suddenly the ac condensor outside will not turn on unless that one thermostat is calling for cool air. The other two thermostats will kick on the air handlers but not the compressor causing warmer air into those zones.

Why does my furnace not turn on when I Turn on the heat?

If you set up a program and then forget about it, this may be a reason why your heat isn’t coming on. Make sure your temperature is set correctly and is set to the heat setting, as opposed to off or cool.

Do you have to have a thermostat for a furnace?

In order to make sure your furnace operates properly, you also have to ensure that the thermostat you have is appropriate for the system you have. You must have a thermostat that is matched with your heating system in terms of capacity and capability.

What to do when your heating system won’t turn on?

For heating: if the heating system won’t turn ON, that is NO heat (or cooling) is being delivered when you want it, set the thermostat to its highest temperature setting and wait three to five minutes.

What would cause the furnace blower not to turn on?

1 – Low airflow Dirty Air Filters. If you don’t change your air filters often enough, the filters will become dirty and clogged, which means the heat exchanger retains heat and eventually causes it Dirty Blower Wheel. If your furnace goes on and off too quickly, it could be a dirty blower wheel. Closed or Blocked Air Supply Vents.

What to do when a furnace blower won’t turn off?

In case the furnace blower does not turn off and it is not bringing cold air, the furnace is still lit. If the furnace is still lit, do not turn off the blower. Stop the Furnace. Lower the thermostat in order to stop the furnace. If that does not stop the furnace blower, switch off the thermostat.

Why wont my furnace stop running?

Possible Reasons Why Your Furnace Won’t Stop Running. It is possible that your thermostat is set to an unnecessarily high temperature. Take a look at its setting to determine whether it is in the upper 70s, lower 80s or even higher. If it is egregiously high, put it on a lower setting to see if the furnace will stop running.

Why is your furnace not working?

Dirty air filters are often the culprit behind an inefficiently performing furnace. That’s because air filters trap dust, dirt and debris like hair, which over time can restrict or block vital air flow, overheating the heat exchanger and preventing your furnace from working as it should.