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: How do I adjust the cabin temperature?

The cabin temperature is controlled by the Temp switch in the climate control settings. Press the upwards-facing arrow on the switch to increase the temperature, or press the downward-facing arrow to decrease the temperature.

Q: Car won't crank. It just clicks once but all the lights come on.

A starter like any other mechanical and electrical part is subject to failing sometimes for no apparent reason. However, sometimes this is misdiagnosed as well and often times mistaken for something much more simple like a fuse or starter relay....

Q: Truck overheating

If your coolant is low, you may have a leak that needs repaired. If your coolant level is normal, the problem may be with your thermostat (this part regulates engine temp), the cooling fan, or radiator. You need to have...

Related articles

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...
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.