hi all, i need some help with my volvo 240 sedan, cant drive the car because all the windows get fogged up, we have winter here in australia at the moment that might be a cause i dont know, the windows will fog up even after 30min of driving ( and i mean all windows front,back and sides)the fan and the heater works very well. could someone out there in volvo land help me

 

there are various anti fog glass polishes you could get i had fog shield for mine i woudnt say it cured it but it deffinatly helped ! perma clear works very well dont know if its available in australia though!

 

Failed heater core or associated hoses/connections. Not a job I would look forward to.

 

Heater controls set on 'recirculate'? Quickest way to completely obscure vision when the air is moist.

 

The problem could be that it is recirculating even if the recirculate button is not set. You can check this. Way in the back of the center console (up near the firewall), there is a door that is supposed to open when the recirculate button is pressed.

In order to check it, remove the center console side panel on the passenger side. Start the engine (the system runs on vacum). Peek behind the center console. Press/unpress the recirculate button. You should be able to see the door open (button pressed) and close (button unpressed).

If the door always stays open, then there is either a vacum leak or the actuator that opens/closes the door might be worn out.

I have had the same problem in my '91 240. Since the air conditioner no longer works, I just jammed a rag between the firewall and the door to keep it closed.

Hope this helps.