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The primary element of the Chevy Blazer’s air conditioning system, the blower motor is in charge of distributing hot or cold air via the AC vents. When you turn on the air conditioning in your Blazer, no air will come out of the vents if the blower motor fails due to a malfunction.
Blowing fuses, defective relays, damaged resistors, control module issues, and broken blower motors are the most typical causes of the AC fan blower motor not working in Chevy Blazers. The blower motor, however, can potentially stop working due to a faulty electrical connector, a broken wire, or an issue with the climate control system.
Blown Fuse
The motor that blows air in a Chevy Blazer requires electricity to function. If a fuse blows, the power supply is cut, and the motor stops working.
How to Fix
To determine the precise placement of the blower motor fuse, see your Blazer’s owner’s manual or the cover of the fuse box. Replace the fuse with a fresh one with the required amp rating if it has blown.
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Fuse pullers or needle nose pliers can be used to remove the fuse from the fuse box and hold it up to the light to check it. The fuse has blown if the metal strip has a middle-break. You must swap it out for one with the exact same amperage and color. Whichever way you enter the fuse is irrelevant.
Bad Relay
Relays or toggle switches are used to turn electronic loads on and off. A short relay in the drive train control module of Chevy Blazer could cause the blower motor in the AC unit to stop working.
How to Fix
Discovering the location of the blower motor relay for your specific Blazer model should be your first step. The owner’s manual for your car may have the details. Relays are typically found under the left side of the steering wheel or in the engine compartment. The wiring diagram might be drawn on the facing, if you’re lucky. By switching it out for other relays in the fuse box with a similar amp rating, you can test the relay. But it’s strongly advised to unplug the car’s battery before you start the replacement.
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Ask a Mechanic Live NowControl Module or Bad Resistor
The purpose of having a blowers motor resistor is to allow you to regulate the speed of blowers motors. When a speed controller in a Blazer is activated, the system causes the motor to spin more or less in order to drive more powerfully. If a resistor gets faulted, the blower motor may stop operating.
How to Fix
It’s better to take your car to a repair if you’re unsure of which component is defective. However, you can compare the resistance of the resistor module to one that is known to be in good condition if you’re ready to undertake some self-directed troubleshooting. In case the control module is broken, you can also replace it. Locate the module underneath the instrument panel cover after removing the cover. To access it, you’ll need to remove a number of screws. Once you get it in your hands, you can inspect it for burned insulation or damaged or melted wires. Replace the module with a new one of the same brand and model if everything appears to be in order.
Max Anthony
Max is a gizmo-savvy guy, who has a tendency to get pulled into the nitty gritty details of technology and cars. He attended UT Austin, where he studied Information Science. He’s married and has three kids, one dog and a GMC truck and a Porsche 911. With a large family, he still finds time to share tips and tricks on cars, trucks and more.
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