A number of cars suffer from this problem because when you have the heater on it gets hot behind the dashboard, the LCD display starts to fade on my 406 for the same reason, I suspect you don't get this problem in the summer when the heater is not on. I think most of the heat comes from the pipes feeding the face level air ducts on the dashboard, if you can close these and have the heat directed elswhere it might help but if you are a cold mortal like me I like hot air coming from everywhere.
|