Skip the auto shop - Our mechanics make house calls

Q: Car won't blow any hot or cold air

asked by on

I turn my car on and turn the a/c on or switch it to heater mode and nothing comes on. I checked all the vents and no air is blowing out. When the a/c and heater is on there's no sound. What could it be?

My car has 161000 miles.
My car's transmission is unknown to me.

A: This may be related to a faulty blower moto...

This may be related to a faulty blower motor or blower motor relay. The blower motor is a unit inside your vent system that blows warm air from the heater core to the vents when the heater is on or cool air from the air conditioning system when the A/C is on. The blower motor relay supplies power to this motor when you turn the switch to "on" that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all. I would suggest having an expert from YourMechanic come to your location to diagnose your vehicle’s blower motor system.

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・Save up to 30%

Get a quote

What others are asking

Q: A/C only blows occasionally and only on high

Hi there. You have more than one problem with the A/C blower and blend door controls on the vehicle. The blower motor is bad and most likely burned out the blower resistor from drawing too many amps. Have the blower...

Q: Car making loud noise and barely running.

This sounds like it could be a serious problem for your car. My first recommendation would be to have this vehicle inspected by a certified mechanic as soon as possible to avoid these symptoms turning into larger problems. The list...

Q: Bad idle with no check engine light on

Greetings, I'm sorry to hear about your sister. A rough idle may be caused by many different things such as low fuel pressure, low voltage to the fuel injectors, dirty fuel injectors, a vacuum leak, a faulty Oxygen sensor or...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...