Q: Heater valve stuck.
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.
Recommended Services
| Heater Control Valve Replacement | $168.19 - $1039.92 | Get a Quote |
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.
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
What others are asking
How do I adjust the four-way power driver seat?
The four-way power driver seat is very easy to adjust: 1. Manually move the seat forward or backward by lifting on the seat adjustment handle at the front of the seat, moving the seat forwards or backwards, and releasing the...
How do I pair a phone with the infotainment system?
The infotainment system can pair up to five different mobile devices through the Bluetooth system. Pairing your phone takes a few steps, but is very easy: 1. Turn on the infotainment system. 2. Press the CONFIG button. 3. Use the...
Rumbling sound from rear of vehicle
There can be multiple causes when dealing with a roaring or rumbling sound. A wheel bearing can cause a rumbling sound. When it comes to a rear end or differential it is important that all of the correct shims have...
Water leaking from car
Hello. If you have a coolant leak from your car that you cannot easily see, then the system needs to be pressure tested. I would typically use a cooling system pressure tester to pressurize the system to see if the...
Difficulty shifting, starting problems
Hello there. It does indeed sound like something may be going on with the transmission for your 2001 Mercedes Benz CLK430. The most common causes of shifting poorly would be a low fluid level (https://www.yourmechanic.com/services/transmission-fluid-service), transmission linkage, shift solenoid (https://www.yourmechanic.com/services/downshift-solenoid-replacement)...
I put new throttle position sensor on now the car wont start i connected everything back on correctly so why wont it crank now ?
Hey there. Replacement of the throttle position sensor on your vehicle is pretty straight forward. There is no adjustment to be made - just remove and replace the sensor and you should be done. If the vehicle isn't starting, you...
I got a Patrol vehicle, Chevrolet Impala that calls for 5w30 motor oil. Can I use 5w20 if necessary?
Hi there. If you're in dire straits to find the right type of oil, using a small amount of 5 w 20 should not hurt your vehicle; especially during colder times during the year. The 5 is the low end...
2007 Lincoln Navigator gas cap indicator light won't turn off
In order to turn off the light you will need to have the computer scanned for codes and any codes cleared from memory with a scanner.
Got a problem with the tail lights on 99 Lincoln town car
It sounds like you may have one of the filaments burnt in the brake light bulb (https://www.yourmechanic.com/services/brake-light-bulb-replacement). The brake light bulb has two separate filaments that receive power separately depending on the function. One is for the brake lights when...
Related articles
4 Essential Things to Know About Your Car’s Seats and Seat Covers
Car Car seats come standard in all vehicles. They are made from durable materials so as to withstand prolonged use. Car seats come with various options when choosing materials, special options, and style of seating to make your ride more...
How Long Does an Exhaust Pressure Control Valve Last?
The The exhaust pressure control valve is used in diesel vehicles as part of its EGR (exhaust gas recirculation) system. The EGR system is meant to bring down the amount of emissions that vehicles produce, as the gas that is...
How to Replace a High Pressure Safety Valve
High pressure safety valves help the car engine run smoothly. Oil filter housings can burst if high pressure relief valves are stuck closed.
Browse other content
Estimates
Cities