Q: A/C won't turn off or lower from high

asked by on

About a month ago, I turned on my car and the A/C blower was on high ("4") and I was una le to turn it off or lower it to 1, 2 or 3 (that is, the knob moves, but the system doesn't respond.) Fortunately, it cools, so my problem is I can't turn it off or use tge lower settings. I thought aboutthe blower resistor, but am not sure that helps the on/off issue.

My car has 55000 miles.
My car has an automatic transmission.

The most common cause of blower motor issues is the blower motor resistor, though usually it will only work on high speed and won’t work on any other speeds. Because yours is blowing in high speed in all speed settings, it’s also possible there is a problem with the blower switch itself. I would suggest having a qualified technician, such as one from YourMechanic, inspect the blower switch and the blower motor resistor to see where the cause lies.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. A/C won't turn off or lower from high

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: Headrests are hurting my posture

Unfortunately, since this is the way the car was designed it can not be changed. The only thing that could be done would be to either replace the headrests with aftermarket headrests, take the headrests out and install them backwards,...

Q: My toyota sienna 2008 went to a puddle of water and now it wont star the starter heat up a lot when i try to turn the car on

It's possible that water infiltrated ignition system components. Of course it is also possible that the no start and the incident with the puddle are just a coincidence. If the engine cranks at adequate RPM, be sure there is adequate...

Q: My alarm keeps going off and car won't start after changing battery, what can be wrong?

Hello, and thank you for writing in. When dealing with alarm and starting issues, you are really dealing with a miscommunication with the alarm system. If you have a spare key, try using it to disarm the system and start...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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 Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.