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.

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 1,000 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
  1. Home
  2. Questions
  3. Heat Won't Blow at 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: transmission

This could be a lack of vacuum or potentially a bad shift solenoid. Most modern transmissions operate on vacuum actuated controls and solenoids both of which commonly fail at times which will cause the lack of or intermittent shifting problem...

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: Especailly in the early mornings Gear knocks off as i drive until i put back to (P)park and (D) drive

This may indicate a failing speed sensor. The transmission speed sensor is a magnetic sensor that provides information related to the speed of the input and output shafts in the transmission, allowing the transmission to shift smoothly. The sensor counts...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.