Skip the auto shop - Our mechanics make house calls

Q: Ac not blowing out of vents turns on but doesn't come out

asked by on

I don't hear anything when I turn it on or smell anything . I can hear it click on when I press the power button but nothing comes out no matter the temperature or level the ac or heater is on. Unless I get on the hwy if I turn it on it'll blow very cold air for about 45 sec and stop. Ive tried doing that repeatedly and it does the same thing over and over blows very cold and turns off . Any other time I can have the ac on and nothing blows out of the vents at all
My car has an automatic transmission.

A: Hi! It is sounding like you may have a bad ...

Hi! It is sounding like you may have a bad blower motor control module. It is located under the dash next to the blower motor. A technician can test it with a volt meter to verify its proper operation. I'd also suggest inspecting/replacing the cabin air filter while you're down there, as it can restrict air flow out of the vents.

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: strange maybe pressure release sound from right rear sounds like on inside

Hello, thanks for writing in about your Dodge Grand Caravan. From what you've described, the noise is most likely from the A/C system being low on refrigerant. If you decide to get this fixed, have a certified technician, like one...

Q: I have a problem with my truck vibrating.

If a motor vibrates while in park idling, there is either a balance issue with the motor or an engine mount problem. Locating such problems is not for the faint of heart. There are several techniques that can be done,...

Q: No air coming from vents

Try to put the blower on high speed and move the mode to floor or windshield to see if any air is felt or the noise from the motor is heard. If you hear the blower running but still get...

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...
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...