Skip the auto shop - Our mechanics make house calls

Q: A/C not blowing through dash vents

asked by on

I had my battery changed about two weeks ago and ever since then the a/c won't blow from the dash vents. I've tried recalibration by disconnecting the battery and pulling the HVAC fuses, letting it sit then hooking everything back up. When I turned the car on it went trough it's cycle and for about 15 seconds the air came through the dash, but then it stopped. I was a little disappointed, I thought I was on to something. Could my issue be the actuator?

My car has 146000 miles.
My car has an automatic transmission.

The most common cause in this case is the mode selection actuator. I am going to assume the AC does blow from the other vents, as this is the normal indicator for the failing mode selection actuator.

The HVAC uses actuator for many things such as selecting hot or cold and what vents the air blows from. Though it seems unlikely the battery replacement and the actuator fault is most probably happenstance. A qualified Technician such as one from YourMechanic will be able to diagnose your AC system fault and perform any repairs required.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: My check engine light is on

A vehicle that has a problem with the engine or power train can turn on the check engine light and set a code in the computer. The list of possible codes and problems are in the hundreds. You will need...

Q: Check Engine and Service 4 Wheel Drive lights on.

Hi there. These issues that you are having would not be related to a tune up or oil change, though they should be done if they are over due. Since the check engine light is on you need to start...

Q: Replaced water pump (no noise before just leaky) now there's loud humming noise and I don't have heat. Haven't tried driving yet.

Hi there. From the description you have provided, you replacing the water pump and now you have a new noise and no heat, are an combination of things going on. First, the loud humming noise coming from the water pump/timing...

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...