Q: Heater valve stuck.

asked by on January 06, 2016

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

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

Secondary air injection

Hi There, As you may know, the purpose of the secondary air injection system is to inject more air into the exhaust system at cold start to help light the catalyst material inside the catalytic converter quicker. The reason for...

Wheel bearing replacement

The front wheel bearings would need to be replaced with the front hub assembly unless you have the very specialized puller and press tools to remove and install the bearings. It is recommended to replace hub and bearing as an...

Why does my tachometer not stay at zero?

Hi there. The tachometer on your 2007 BMW 328i is designed to measure the revolutions per minute (RPM) of the engine while it is in operation. Anytime the engine is running, the engine will idle (without the use of the...

Related articles

Symptoms of a Bad or Failing Expansion Valve (Orifice Tube)
Common signs include the AC system working worse than usual, frost coming from the vents, or the AC compressor constantly running.
The Best Used Cars to Buy if You Live Close to the Ocean
If If you live close to the ocean, your vehicle is going to be far more vulnerable to rust than if you lived further inland. And the fact is, when it comes to resisting rust, not all vehicles are created...
How to Buy a Good Quality Positive Crankcase Ventilation (PCV) Valve
The The positive crankcase ventilation (PCV) helps create the division of emission-control devices; it routes the leftover combustion gases from the bottom of the engine and the oil pan back into the crankcase where instead of escaping into the atmosphere...