Stay Cool with the Right Blower Motor for Your Car

Blower Motor
Blower Motor

Contrary to the general belief, a Blower Motor is required not only for the smooth operation of your car’s air conditioner but also for protecting the car’s engine from getting overheated. Naturally, a Blower Motor then is a very important part of a vehicle’s machinery which one must know about.

The Basics:

A Blower Motor is an electrical motor, with a fan designed to circulate an air current in the car’s interiors at moderate pressure through ducting and vents. Usually designed as part of the vehicle’s air conditioning and heating systems, a Blower Motor generally consists of a motor and a fan assembly in a case. It is normally located inside the heater housing under the glove box area of the dashboard.

What does a Blower Motor do?

Accessible either through the dashboard or through the bulkhead under the bonnet, the Blower Motor allows the heating and air conditioning system of your vehicle to provide passenger comfort by making provision for hot or cold air, or by defrosting the windshield. How much air gets released into the passenger compartment is determined by the settings chosen on the blower control. Blower Motors draw air in from outside the vehicle and then pass it through the heating and cooling elements. When hot coolant from the engine is diverted through the heater core and out through the vents, heat gets delivered. The Blower Motors, thus, are pretty useful in cooling off your car’s engine as they extract heat from the engine coolant.

Resistor – An Important Component of a Blower Motor

The resistor is that key component of a blower motor is the car which is responsible for transferring the electrical current needed to move any air through the vents of the vehicle. The blower motor speed is usually controlled by a series of resistors, collectively forming part of a blower speed controller. Blower motor resistors are prone to wear and tear over time. If the blower motor resistors have worn out, the blower motor will no longer work efficiently, or will only operate on high speed.

Getting Maximum Efficiency from Your Car’s Blower Motor

The Blower Motor will start operating in an intermittent manner when the blower motor resistors get failed. In this situation you will only be able to use the lower settings because the resistors need a low electrical current to work. And, as the resistor will not be sending enough power to move the air through the vents, the air flow will also get drastically reduced. Replacing the resistors in this case will be a good idea.

The bearings in the blower motor can also wear out with time, making it difficult for the motor to operate properly. This may lead to a much reduced air flow or no air flow at all. At times the worn out bearings cause the Blower Motors to start squealing, with the motor shaft vibrating back and forth, in turn affecting the output volume of air flow.

Replacing a non-functional fuse can also set the stopped Blower Motor right, as it is protected by a fuse.

If the air flow into the vehicle starts to reduce over a period of time, it is also possible that the cabin air filter might have got blocked. A blocked cabin air filter can put unnecessary strain on the motor’s fan by restricting the air flow output. Getting your car serviced regularly can help prevent this issue.

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