Q: Heat/AC blower turns off and on

asked by on

Blower intermittent. Shuts off when button on and turns on when button off. Has even stayed on after car is,shut down and keys removed from ignition. Heat and AC are OK. It is just the fan/Blower. I was told it's probably a switch loose. How can I have this properly diagnosed and repaired,

My car has 130000 miles.

Hi there. Check the switch for any loose wires or shorts from the blower motor switch to the ignition switch. Check the condition of the wire connections for an corrosion and see if the wires are loose on the ground. If you need further assistance troubleshooting your vehicle, then consult with a certified technician from YourMechanic, to diagnose the heater/ac and move forward with repairs.

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. Heat/AC blower turns off and on

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 won't accelerate in D5 or D4, I have to shift manually

This may be a sign of a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a transmission solenoid, which directs transmission...

Q: Water leak under passenger side?

The water on the floor in the passenger side of the car suggests that you may have a leaking heater core. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a small radiator like unit that circulates the hot coolant from the engine through the...

Q: A/C issues

When you do not have the A/C on, you will have pressures on the low and high side be at about 90 to 105 on both sides. When you turn on the A/C with engine idling, the low pressure will...

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...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...