How A Heating Maintenance Technician Cleans The Furnace Blower So It Can Blow Heat Into Your Home

Posted on: 28 September 2022

Annual heating maintenance gets your furnace ready for another cold winter. There are several parts of the furnace that need to be serviced and cleaned, and one important part is the blower. The blower runs all summer along with the AC, and it also runs when you just use the fan, so by winter it could be clogged with dust. Here's how a heating maintenance technician might go about cleaning the blower fan.

All The Attachments Need To Be Removed

The heating maintenance technician has to remove the screws that hold the blower cage in the furnace and disconnect all of the wires so the cage can be pulled out. Once the cage is out, the technician decides whether to clean the blower while it's still in the cage or if they'll unscrew the blower and clean it separately.

Both the cage and blower should be cleaned. The motor and any other parts attached to the cage, such as the control board, should be removed so they don't get full of dust or get wet.

The Individual Fins Have To Be Cleaned

The blower fan looks a little like a hamster wheel. It has many fins on it rather than a few big blades. Dust collects on each of the fins and can get so thick that it blocks airflow between the fins. This is why it's so important to have the blower cleaned. Otherwise, the fan motor could overheat or the fan might spin but not put out any air.

The heating maintenance technician may use a water hose or compressed air to blow the dust off of the wheel and out of cracks in the cage. They'll probably do this work outside so they don't get dust in your home. In addition to blowing the dust off of each fin as much as possible, it will probably be necessary to use a brush and scrub each individual fin to get them all clean. The blower cage may also need to be brushed to get it free of dust.

Clean Inside The Furnace Too

The maintenance technician may also need to vacuum out the furnace in the area of the blower assembly to remove dirt and dust that would get pulled back into the blower fins. The technician might also check and replace the filter if needed so the filter can do a good job of keeping dust out of the furnace.

When the furnace is clean, the technician can put the blower back in the cage and secure it with screws, and then insert the cage back into the furnace and secure it to the furnace with screws. The last step is to reconnect the wires so the control board can trigger the blower to turn on when heat is needed in your home.  

For more information, contact a local company like Comfort Tech Heating & Air Conditioning.


HVAC For The Layman

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