Skip the auto shop - Our mechanics make house calls

Q: broken themostat, broken fan blower

asked by on

I had no heat 2 weeks ago. I changed the thermostat. 2 weeks later my blower fan quit working. When I push on the knob it blinks 3 times. What's wrong?

A: Hey there. These issues may be related or s...

Hey there. These issues may be related or separate problems. If replacing the thermostat provided heat, it was most likely stuck closed and not allowing coolant to flow to the heater core. The blower fan is a completely different circuit. If the blower motor has stopped working, it could be due to a variety of items such as the AC control unit, blower motor failure, blown fuse or a AC actuator. A qualified technician, such as one from YourMechanic, will be able to diagnose your AC fault and perform any repairs that may be required.

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

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: My car has started heating up, reached "cooling mode on" with temperatures of 250+, and it sounds like the fan stays on when I turn off car.

This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know, the coolant fan switch helps to maintain the proper coolant temperature by turning...

Q: How do I replace my ignition switch with new ignition switch and key then program it to the car

We would need your model year to advise you regarding the specific service procedure as it can vary from year to year. The exact procedure is set forth in the Factory Service Manual (FSM) and you will need a copy...

Q: Revs real high when I leave it idling

Your engine control system is constantly making adjustments in relation to the various input signals it receives. Some idle changes are normal adjustments to a number of things that may be occurring. For example if left idling for a long...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...