A90 1987 quattro saloon windows steaming up

Help please,
A90 Quattro Sept 1987 Saloon
The windows keep steaming up even when the car is sitting idle for a few days. In cold weather there is a lot of condensation on the inside
of windscreen.
When driving in wet weather the windows also steam up and takes forever to clear. The side windows are usually permanantly steamed up.
Heater and blower ok and air blowing to and through the relevant vents. Heated rear window working but appears slow to demist.
The only solution so far is driving with windows open for a time.
Any help will be greatly appreciated.
William
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William Duguid wrote:

Otherwise, look for a water leak into the car. Are any of the carpets wet?
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wrote:

Three possibilities... 1. You have a leak in the heater core that is letting water vapour get into the vent system -- not likely unless you can also smell anti-freeze inside the car when it steams up.
2. You have a hole or some other leak that is letting water into the car and soaking the carpets and/or underlay matting. This is the most probable.
3. It's winter and you are dragging a lot of snow into the car on your boots/shoes. Same effect as #2.
J.
-- Jay. (remove dashes for legal email address)
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If the system is anything like the 1984 - 1991 T44 series (5000s and 100 /200 series) the first place to suspect is a broken spring on the air recirculation door. The spring holds the door open to allow outside air in by default but is missing it will fog the windows badly.
On the T44s the recirc door is located on the firewall up behind the glove box.
While you are in there check to be sure that the vacuum line is on the doors servo.
TonyJ former T44 series X 4 current 98.5 A4 1.8 TQM
William Duguid wrote:

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