Why Does Your Furnace Turn On But Not Blow Hot Air?

Furnaces are heating systems that use either gas or oil to heat your home. The furnace blows warm air through a system of ducts and vents to heat your home. However, sometimes your furnace may turn on, but not blow hot air. Contact the professionals at Alta Air Inc. for furnace repair in Woods Cross, UT to assist you with any issue you may be facing.

There are several reasons why furnaces not blowing hot air:

Thermostat problems:

A furnace that does not blow hot air can be caused by thermostat problems. Below are some of the common issues related to a faulty thermostat:

  • Low battery: If the thermostat is battery-powered, then it may not be working correctly if the battery is low. Replace the battery to see if this fixes the problem.
  • Fan turning on all the time: The furnace may be having trouble reaching the set temperature, so the fan turns on to help cool the house down. It will cause the furnace to run longer than usual and use more energy.
  • Wrong settings: The thermostat may be set to “heat” but the temperature is set too low or set to “cool”. Be sure to check the thermostat settings to make sure they are correct.

A furnace is not receiving enough power:

This problem could be due to a tripped circuit breaker or a blown fuse. Check your home’s breaker box or fuse panel to see if any of the circuits have been tripped or if any fuses have blown.

Dirty furnace filter:

A furnace filter that is full of dust and dirt can restrict airflow and prevent heat from reaching your home. It has to work harder to push air through the dirty filter, which can cause the furnace to overheat and shut off. Check your furnace filter and replace it if it is dirty.

Blower motor problems:

The furnace blower motor is the component that moves air through the furnace. If the motor is not working, then no air will be moving through the furnace and it will not be able to heat your home. You will need to contact a furnace repair technician to diagnose and repair the problem.

Clogged burners:

If the burners in your furnace are clogged, the furnace won’t be able to heat up properly and blow hot air. Clean the burners and make sure they are clear of any debris.

Furnace having a problem with gas or oil:

If your furnace uses gas or oil to heat your home, then there may be a problem with the supply of gas or oil. Check to see if the furnace is getting enough gas or oil. If not, you will need to contact your gas or oil supplier.

Furnace problems:

If you have checked all of the above and your furnace still does not blow hot air, there may be a problem with the furnace itself. Furnace repair or furnace replacement may be necessary.

If your furnace is still not blowing hot air after trying these troubleshooting tips, it’s time to call a professional. Alta Air Inc. can help you with all your furnace needs, from repairs to replacement. Call us now.