HVAC Fan Motor

While fairly uncomplicated, the fan motor is a vital component of a heating and AC system. As part of the unit that pumps air through the system, the role of a fan motor is to keep the blades turning, which allows the system to circulate air. The fan motor is one of the hardest working parts of an air conditioning unit. It can be subjected to significant wear and tear if not properly maintained.

When discussing HVAC fan motors, it’s important to keep in mind that there are two types: the condenser fan motor, located in the outdoor unit, and the blower motor, located in the indoor unit. While both motors vary slightly, they work together and share the same purpose of controlling the airflow of the unit. Depending on the HVAC unit, motors are either permanent split capacitors (PSC) or electronically commutated motors (ECM).

Condenser Fan Motor

Did you know, in the process of creating cold air, air conditioners also create warm air? This warm air can wreak havoc on an HVAC system, causing it to overwork and interfere with the cooling efficiency of the air conditioner.

The AC condenser fan motor accounts for this, relieving the condenser unit of the warm air circulating inside the system and keeping it from overheating. While expelling the warm air outdoors, it picks up heat from the evaporator coils, condenser coils, and refrigerant lines, allowing the exhaust to escape from the AC compressor and unit.

Blower Motor

When you think of an HVAC fan motor, you most likely think of the blower motor. It’s the motor responsible for turning the fan blades that deliver the desired air temperature set on the thermostat. For central air conditioning units, the blower motor will create and direct airflow through the ductwork of a home or building, which is how cool air is delivered to various rooms or areas.

Because of the crucial role it plays, the fan motor of your system must remain in proper working order. In most cases, HVAC fan motors will demonstrate telltale signs of an issue that requires a solution. When troubleshooting, the signs to look out for that indicate fan motor failure include:

The Fan Fails to Work Even When the Unit Is Turned On

A clear sign there’s an issue within your system is when the fan doesn’t start even though the HVAC unit is switched on. This problem indicates that there’s a fault with the motor. Because of the extensive damage that can ensue by running the unit with an inoperable fan, it’s recommended you shut off your unit and have a certified HVAC technician inspect it.

The Fan Rotates Very Slowly

Perhaps just as frustrating as a fan that doesn’t turn, blades that rotate very slowly are an indication there’s a problem with the fan motor. A way to tell if a fan is turning slowly is by gauging how much airflow the unit produces. A slow-turning fan will generate weak airflow.

Rattling or Buzzing Noise

An air conditioner making unusual noises can point toward an array of problems. One of the causes may be issues with the fan motor. These abnormal sounds may also suggest the fan motor is reaching the end of its lifespan.

Unusually High Energy Bills

Most HVAC systems are designed to be energy-efficient. Homeowners who notice uncommonly high utility bills should check to see if their HVAC system is operating properly. If not, the culprit may be a faulty fan motor.

To ensure the comfort level of your home or space, faulty HVAC fan motors need to be replaced. The cost of an HVAC motor replacement depends on the type of motor and the size of the system. Larger units require motors with more volts and horsepower, and variable speeds. These powerful motors tend to be more expensive. Smaller units tend to need, less powerful, single-speed motors. Another factor that determines costs is whether or not your current system and motor are covered under warranty.

Just like any other type of motor, there’s always a threat of your HVAC fan motor becoming overheated if it works too hard and is put under too much stress. Constantly running your unit to combat extreme temperatures is one of the most common causes of HVAC fan overuse and burnout. Regular HVAC repair and maintenance help prevent instances like this from happening.

While it’s possible to replace your HVAC system’s faulty fan motor yourself, it’s recommended to trust this job to the professionals at a reputable HVAC company. Without the proper training and knowledge, you could create more problems for yourself and your HVAC unit if you go the DIY route.

Don’t let a faulty HVAC fan motor cause you discomfort any longer. Serving electricians, contractors, and DIY homeowners, HomElectrical is pleased to boast a large selection of reliable heating and air conditioning fan motors and other HVAC system parts and accessories. Our convenient online ordering makes obtaining the correct motor simple and easy.

For more information, call HomElectrical at 888-616-3532 or create an account today to start shopping.