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・Save up to 30%

Get a quote

What others are asking

Q: Air conditioner quit working

Hi. Most Saturn vehicles that have a sudden failure in the AC system either have low refrigerant or a bad AC switch. If the fan turns on the inside of the vehicle and it's just not getting cold, then the...

Q: Car shuts off at speeds over 60 mph

Hey there, thanks for writing in about your 2001 Oldsmobile Bravada. You are losing ignition spark or fuel pressure to the ignition. The vehicle and year is known to have failures in both systems and the only way to diagnose...

Q: I have power steering hoses that needs to be replaced. What is the labor to do it?

Hi and thanks for contacting YourMechanic. First, you will need to put a drain pan under the hoses. Remove one end of the hoses and drain out the fluid. Remove the other end of the hose and take them off....

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.