Here's the situation, looking for confirmation on my possible diagnosis or
a
point in another direction.
1989 900 T
Engine up to temperature and idling in a parking lot with the outside
temperature around 20 degrees F. The temperature gauge starts climbing
and
at the same time the cabin heat starts blowing cold air. Once we start
driving again the heat comes back and the temp gauge goes back to normal.
Are we talking a bad thermostat here or am I way off base?
TIA