Q: My air vents sometimes stop working.
Over the last few weeks my air vents have stopped working. No AC, no heat, no air flow at any setting. Then just randomly it will start working again. Any reason it would do this?
My car has 114000 miles.
My car has an automatic transmission.
Recommended Services
| Blower Motor Relay Replacement | $103.05 - $265.58 | Get a Quote |
Hi there. Anytime something is not functioning all the time and is randomly shutting off, then there is an issue with the relay of that circuit. Check the relay to the fan motor circuit and see if there is power to the relay. If there is power to the relay, then I suggest replacing the blower fan relay in the cabin area of the vehicle. If you need further assistance with your fan motor coming on randomly in the cab, then seek out a professional, such as one from Your Mechanic, to help you.
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
What others are asking
How Do I Use a Blind Spot Mirror?
If you’ve never used blind spot mirrors (https://www.yourmechanic.com/article/how-to-use-blind-spot-mirrors) on a vehicle you’ve driven, they can be a bit disorienting while getting used to them. The convex shape provides a wider field of view and shows objects, cars, and curbs you...
AC not blowing cold air in 2003 Toyota Corolla
If the air volume is low coming out of the vents the likely cause is a clogged cabin air filter which should be replaced (https://www.yourmechanic.com/services/cabin-air-filter-replacement). This can happen especially if the cabin filter has not replaced in a long time....
dashboard right blinker light decided to blink twice as fast as normal. are the electronics going out also one back tail light is
In order to replace the rear bulb that is not working you have to remove the light assembly. The blinker on the dash blinks fast when there is a light bulb on that side is burned out in most cases....
What could make a car stop running in the middle of driving it?
Hi there. From the description you provided, your vehicle stalling once, could of been caused by variety of reasons. A temporary glitch in any of the vehicle's systems that keep it running. Unfortunately, something like this would be very difficult...
ABS light turns On and Off.
Hi there. It could be a mechanical problem, such as the tie rod or a broken CV joint that is causing this issue. When the inner portion of the tire does not touch the ground, that's known as a negative...
Check engine light and trouble starting.
Hi there. The P0172 trouble code (https://www.yourmechanic.com/article/p0172-obd-ii-trouble-code-system-too-rich-bank-1-by-blake-griffin) indicates that there is too much gasoline being detected in the exhaust gases exiting the combustion chamber. The ECU uses a number of instruments, such as the mass air flow sensor (MAF), oxygen...
My check-engine light came on and when checked, the code was P0025. The light went out after checking it. Do I still have the prob
Hi there. P0025 is the OBD-II generic code (https://www.yourmechanic.com/article/p0025-obd-ii-trouble-code-camshaft-position-b-timing-over-retarded-bank-2-by-jay-safford) indicating the Engine Control Module (ECM) has determined that the exhaust variable camshaft timing for bank 2 is more retarded than what the ECM has commanded it be. This over retarded...
My key fob doesn't unlock my 2007 Pontiac Grand prix and my obd 2 reader won't connect.
As far as the malfunctioning key fob, it may be time for a new unit. The contacts may be worn out on the circuit board inside the device or the button may be worn and not making enough contact. You...
My traction control and stabilizer control warning light is on what does it mean
Hi There, As you may know, the traction control light and oil change are unrelated issues. The traction control system monitors the steering and stability of the vehicle and engages when loss of traction has been detected. This is done...
Related articles
How Long Does an AC Pressure Switch Last?
Your Your car’s AC system uses refrigerant to help keep you cool and comfortable in hot weather. When the refrigerant is under low pressure, it takes the form of a gas, and when it is under high pressure, it transforms...
How to Replace an AC Fan Control Module
The AC fan control module turns on the AC condenser and the radiator in some cars. The procedure to replace this module varies by make and model.
How to Replace a Heater Blower Motor Switch or Relay
The motor switch on your heater and air conditioning goes bad when the switch gets stuck in certain positions or will not budge at all.
Browse other content
Cities
Maintenance