4 Indicators Your HVAC Blower Motor Needs To Be Replaced

A heating system is vital when winter kicks in. Moreover, this appliance uses the blower compartment to push and circulate air through the ductwork. Note that the compartment comprises a motor, fan blades, and wiring to supply the needed power. However, your blower may deteriorate over time, causing it to fail. When this happens, it will create an uncomfortable ambiance and strain other components. Thus, you should hire an HVAC repair service contractor to assess and fix motor failure for peak efficiency. Below are signs you need to replace your blower motor.

Weak Airflow from The Vents

If you notice weak airflow from the vents, your blower motor may be due for replacement. This may result from the bearings running low on lubrication and grinding against each other. You should know that lack of lubrication increases rotational friction and drag while the rotor is spinning. As such, the fan will not spin effectively to force air through the ducts. Given this, you will have poor airflow that does not meet the set temperature. In such a case, a heating expert should replace the motor and apply a lubricant for proper airflow.

No Airflow at All

The fan motor could be defective when you experience minimal to no airflow. This results from the motor's seal wearing down with time, allowing water to drip into the windings. As a result, water contaminates the lubricant, and the shafts begin to rust, impeding current flow through the motor. On the other hand, a spike in voltage may burn the capacitor, leading to the motor's premature failure. 

Odd Sounds

Your furnace will produce a dull humming sound while running. However, you will notice grinding noises when the blower motor mount breaks. In addition, your furnace will make screeching sounds indicating the bearings in the blower are dry and grinding against each other. Finally, your heating unit will produce clanking noises when a part in the blower assembly becomes loose. In all these cases, you should know that only a motor replacement will lead to a less disruptive and seamless operation.


When dirt and grime accumulate in the blower motor, it reduces operational efficiency. This leads to overheating as this crucial component cannot vent due to limited airflow. Moreover, an aging motor sustains a lot of wear and tear, causing it to strain while spinning the fan. Note that such additional strain on the motor leads to overheating, which causes its failure. Since an old motor consumes more energy than is necessary, you should engage an HVAC repair service expert to replace it to avoid high utility bills.

A failing blower motor puts your heating unit under a lot of strain, making it vulnerable to breakdowns and high energy consumption. Therefore, you should employ the services of a heating expert to service your system regularly for peak performance. 

For more information about AC services, contact a local company.