Skip the auto shop - Our mechanics make house calls

Q: Heat Won't Blow at Floor

asked by on

The heater will blow at the defrost/windshield and the dash vents, but not at the floor. So, if I set it to vents, it works fine. If I turn it to defrost, it's fine. But when I set it to just the floor or combination of vent/floor, or defrost/floor it doesn't come out the floor. I tried the recalibration approach found here but it didn't help:

http://sparkys-answers.com/2011/08/hvac-actuator-recalibration-procedure.html

I found some info elsewhere online suggesting maybe it's the "mode actuator", but not sure.

My car has 130000 miles.
My car has an automatic transmission.

A: There is an actuator that controls the vent...

There is an actuator that controls the vent doors inside the system that open and close to direct air flow. When this is not working properly, this can improperly engage different vents intermittently or sometimes not at all. I would recommend having an expert from YourMechanic come to your home to diagnose the issue with your heater and help you repair it as necessary.

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 A/C only blows cold on recirculate

Hello. You will always get colder air when on recirculate. When taking in the outside air the A/C system will be able to drop the temperature coming in by about 20 to 30 degrees. This means if the outside air...

Q: Clunk in front end.

Hey there. There are several possible causes for a clunk in the front end. It could be a ball joint, stabilizer bar, steering linkage, or any number of other possible causes. Differential fluid being low is also a possible cause,...

Q: Anti-theft keeping car from starting

The ignition switch in your vehicle has likely went inoperative. Replacement involves a tear down of the steering column and grinding the switch bolts. Afterwards, a 30 minute key re-learn procedure is required. If you need assistance with this, a...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...