What should I do if my furnace blower is not running?

If this does not cause the heat to come on, the heating element might need replacement, which requires the services of a professional. If the fan motor runs, but no air comes out, check the blower to ensure the belt is not misaligned or broken.

What does it mean when Furnace Fan does not start?

FAN DOESN’T RUN – The furnace fires, but the blower does not start. After the burners have ignited, the next step in the heating cycle is starting of the blower motor. This will be done either by a heat-activated switch or internal timing of a control board.

When does the blower start on a gas furnace?

After the burners have ignited, the next step in the heating cycle is starting of the blower motor. This will be done either by a heat-activated switch or internal timing of a control board. In either instance, the blower motor should start within 30 – 90 seconds after burner ignition.

What are the temperature limits for the furnace blower?

This limit has 3 set points on it. The first is the temperature at which the fan turns off after a heat call, the second is the temperature at which the fan shuts on for a heat call, and the third is the temperature at which the furnace shuts down the burners and continues to run the blower for safety reasons.

Is the furnace blower supposed to come on before ignition?

This is a hot surface ignition unit so it takes a bit to heat up plus there is a purge timer. The main blower should not be coming on right away, it should allow the air to become heated before it comes on so it doesn’t circulate cold air. Model # G40UH-36B-090-03.

Why does my furnace keep blowing cold air?

Check your thermostat. (That’s where a tech will start first, so you should as well.) If your thermostat’s fan setting is set to ON, the furnace blower will constantly run even when your furnace isn’t heating the air. Solution: Turn your thermostat’s fan setting to AUTO.