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
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