Skip the auto shop - Our mechanics make house calls

Q: A/C-Heater blower not working

asked by on

Yesterday my a/c-heater blower went out meaning no speeds work. I checked fuse #40(a/c control module) in the interior fuse block and it was tripped. I replaced it and it tripped again. I checked the motor blower resistor and it was fried. I replaced that and the fuse and nothing happened except the #40 fuse blew again. Please help

My car has 168000 miles.
My car has an automatic transmission.

Try to disconnect the blower motor to see if the fuse blows again. The motor is shorted most likely. The motor fried the module (resistor) and may of fried the new one.

Try disconnecting the module and blower and see if the fuse blows. If it does not then reconnect the resistor module first and it shouldn’t blow. Then connect the blower and listen for the fuse to blow. If it does, replace the blower motor.

I’d recommend getting some help from a qualified technician if you decide to get this fixed. They will be able to diagnose the issue with your A/C heater and make the necessary repairs at your own convenience.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How do you use the automatic heater and air conditioner?

If your car is equipped with an automatic climate control system, using it is actually very simple. Here’s what you need to know. For the heater and air conditioner to work in auto mode, you need to first press...

Q: Metallic noise coming from front wheels

Hi there. Brake pads have a thin metal strip that is meant to touch your rotor when the pads get down to about 20%. This thin piece of metal can bend easily during installation and can cause a noise like...

Q: 4 days after dealership replaced headgasket I need a new transmission

Hello. The sequence of events and multiple failures you are describing are unusual. To replace a head gasket at 95,000 miles is unusual, except in a circumstance where the engine was overheated at some point in its life. Because you...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...