Do I have to leave my air con on all the time to stop the windows steaming up?

Is there a solution to preventing my car's windows steaming up without having the air con on permanently?

Asked on 14 September 2018 by S. Carson

Answered by Dan Powell
Switching off the air conditioning system to save fuel is a false economy. The ventilation system is designed to be used with the air con on all of the time, regardless of what the weather outside is doing. Not only will this keep the system's seals lubricated and gas-tight, but it will also (as you’ve found) keep your windows clear. Switching the system off for long periods in the winter months could cause the coolant to leak out. It also encourages bacteria to grow in the system, which is then blown into the car when you switch the air con on again.
Tags: air con
Similar questions
My 2018 Audi SQ7 is now on 28,000 miles. It has no air conditioning. When I start it, the light on the A/C button is initially on but goes out a few seconds later. After much chagrin in trying to get Audi...
I am looking for a recommended garage/specialist to top up the air conditioning on a 2004 Toyota Corolla in the Poole, Dorset area
How do I clean the air conditioning to remove bad odours?
 

Ask Honest John

Value my car