Q: AC not working correctly

asked by on

The AC in my car comes out colder on the passenger's side when compared to the driver's side, and is putting out hot air through the floor vents. The auto store person mentioned that it might need a modulator. I also have a slow oil leak.

Hi. When air comes out of the vents at uneven temperatures, the blend door actuator is usually at fault. Either debris buildup is blocking the door from moving or the electronic actuator on the door itself is malfunctioning. A technician can usually spot the actuator if they look into the dashboard while someone is operating the AC controls. Have a mechanic inspect the AC system in your vehicle to eliminate further complications. Also, most oil leaks originate from the valve cover gasket or oil pan gasket. I strongly suggest having a training technician inspect the engine seals for leakage.

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. AC not working correctly

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: Getting wobbly handling on the highway

A few things could be causing the wobble you feel at high speeds. The solid front suspension is susceptible to this condition, especially if aftermarket items are being used or the suspension has been modified. The front steering can...

Q: Auto climate control

Even without having specified what model Mercedes, yes they do use in car temperature sensors. Your issue can be related to the in-car temperature sensor or the climate control unit itself. Since Mercedes climate control systems are known for their...

Q: Car engine sounds like vacuum cleaner.

The issue sounds like the timing belt is put on 180 degrees off making the exhaust the open when trying to start and the intake open when trying to compression. This will cause a vacuum sucking sound as the vehicle...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.