Q: Heater valve stuck.

asked by on

The backseat heater vent, in the center console, constantly blows hot air. I think a heater valve is stuck and doesn't turn off when I switch the rear temperature to cold.

The heater control valve is mounter under the hood on this vehicle. The valve should be closed when the temperature is set to cold for the rear a/c system. The recommendation would be to have a qualified mechanic check for the heat flow valve turning on and off with the system. The vent temperature when set to cold should be colder than when set to heat and the temperature control motor may be inoperative. Both of the parts will need to be checked against the flow control diagram of the service manual.

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. Heater valve stuck.

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: FUEL WONT GO IN TANK AND AUTO NOZZLE TRIPS

You most likely have a fuel filler nozzle that has an outer hose with an outer hose in it. If the inner hose comes off of its mounting at the inlet of nozzle then it will restrict the fuel trying...

Q: How does the ventilation system work?

Sometimes you don’t want the heat or the air on in the car. The ventilation system is designed to circulate fresh air from outside the car into the cabin. To use this system, follow these steps: Turn the temperature...

Q: Missing/Broken ECU - 1989 BMW 325i

If your ECM is failing or has failed, it shouldn't be extremely difficult to find a good shop to rebuild or replace them. There are a number of electronic rebuilders who rebuild ECMs (w/warranty). Also, there are a number of...

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...
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...
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.