Q: My car stopped blowing heat and air out of the vents and on the floor.

asked by on

I have a 2010 Cadillac CTS 3.0 V6 Engine. When I turn the heat or a/c on nothing blows out of the vents or on the floor. Slowly the defroster will sometimes defrost the front windshield and sometimes I can feel some heat on my feet when I have the heater on, but nothing is blowing. The blower stopped working without any warning, such as hearing a noise or working intermittently.

My car has 49000 miles.
My car has an automatic transmission.

This may be related to a faulty blower motor or blower motor relay. Occasionally, the blower motor itself will wear out or become faulty working intermittently as the brush contacts inside the motor wear out. 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. This may also cause the blower motor to work intermittently. I would suggest having an expert from YourMechanic come to your location to diagnose your vehicle’s blower motor system.

Was this answer helpful?
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. My car stopped blowing heat and air out of the vents and on the floor.

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: The engine loses power after a longer drive

It is possible that your fuel pump would be getting weak. Often times if the fuel level is run low many times, this can cause the fuel pump to overheat. If the fuel pump overheats, this can cause it...

Q: Cost to install transmission? 2008 Cadillac CTS

Hello - unfortunately, this is not a service YourMechanic offers at this time. I recommend you check with a reputable transmission repair shop in your area for a transmission replacement quote. Thanks for thinking of YourMechanic though!

Q: Power steering, engine, and brakes quit, but lights work

A few different faults can cause the vehicle to stall out like this. The most common would be the ignition switch, battery, fuel pump, fuel filter, or battery cable. The brakes will work without the engine on but they loose...

Related articles

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...
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...
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...