Q: Trying to stop outside air from coming into my car

asked by on

How do I prevent outside fumes (from other cars) from coming in through the air conditioning/heater vents? The owner's manual says to put the A/C on Max A/C, but that doesn't work. Most other vehicles have a button that shuts off outside air, but my car doesn't. Any tips?

The Max A/C setting should close the fresh air vents off, preventing fresh air from entering the climate control system, but there is natural ventilation built in every vehicle so it is impossible to completely seal the vehicle from outside air. If the Max A/C setting does not close off the fresh air vents, then the function of the fresh air flaps need to be checked. A professional mechanic will be able to do this for you and diagnose the problem with your A/C system accurately.

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. Trying to stop outside air from coming into my car

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: Front of car sitting on front passenger's side wheel

If the tire is gone, or shredded, you had a blow out and will need to replace the tire. If the suspension is sagging to the point that the fender is rubbing the tire, you have a suspension failure. This...

Q: Air conditioning blockage pressure - 1988 Mercedes-Benz 300TE

Hey there. The condenser is blocked or the expansion valve is stuck causing the problem. Make sure when testing you have proper air flow across the condenser. If the fan clutch is not working good then the pressures will be...

Q: What is this part called ?

The round disc you see is just a rubber plug that covers the access port to the transmission torque converter drain plug. If you are leaking oil from this location you will need to first see if it is engine...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.