Hello,
I have a 1993 900 CS ( Non Turbo) with a curious problem. Car starts and heats up well. When engine is at normal operating temperature there is plenty , I mean plenty of heat , but as you sit in traffic - not moving- and the engine temp rises up to the point that the radiator fan comes on the heater goes cold. But once you start moving and the engine temp starts to drop back down to normal the heat comes back. The temp knob seems to have no impact during the no heat period , is effect again once the operating temperature drops back to normal. The radiator fan comes at the right time and works well.
Any ideas?
Allan Schneider