Furnace Blower Not Working Air Conditioning

You might need a new fan center relay if your furnace is equipped fan sequencer or furnace control board.

Furnace blower not working air conditioning.

A control board relay where the relay contacts are welded shut can cause the blower to run continuously too. Most thermostats control both central air and central heat. The home s main electrical panel has a series of circuit breakers for each electrical loop in the house. Your system probably has a manual fan on switch on.

My furnace ac won t turn on step 1. Our email address is. If the fan motor runs but no air comes out check the blower to ensure the belt is not misaligned or broken. If you have cool air but a steady airflow your blower motor is working but your heat exchanger or burner is not.

You would probably need a new control board if the relay on the control board is welded closed. I would continue diagnosis by watching the behavior of. But here are some suggestions to start troubleshooting the problem of a furnace blower fan that does not start. As we begin to troubleshoot it is important to check for a couple of things.

Inspect the heat exchanger for cracks which can cause a safety hazard. Set it to turn on the ac or heat. I would start by confirming that the blower fan will operate. Check the furnace flame for a complete blue color.

Any yellow red or orange indicates dust and dirt buildup on the burner. If none of these troubleshooting steps work call a professional technician as the. Check the circuit breaker for your ac or heater unit and inspect the fuses. Blower won t work on central air thermostat.

Turn the power button next to the ac heating unit to the on position. A sequencer looks like the picture below. In this hvac troubleshooting video i go over the top 10 reasons why the blower fan motor is not starting in a furnace air handler or packaged unit for air. A shorted thermostat wire can cause this too but it is very uncommon.

Check your thermostat if your furnace is not blowing air it seems like this would be a no brainer but i can t tell.