Hello everybody! In this Winter season, my Tipo is somehow unwilling to heat ;) The engine is 1.7 diesel and has made 177.700 km (approx. 110.400 miles), the car is 10 (almost 11) years old. There is coolant up to "min" mark on the expansion container. There is no special heater (Webasto or Eberspecher etc.) nor air-conditioner installed in this car.
And here is what is happening: The engine thermometer shows approx. 90 deg. C and if I am driving fast enough (more than 80 km/h - 50 mil/h) or if the main shaft is rotating fast enough (more than 3000 rotations per sec.) there is warm air coming inside (when the fan is turned on). If the car stops (red light or whatever), and the rotations fall to 2000 (approx.), then there is no more warm air, but rather cold (at best lukewarm). If I at that moment increse rotations up to approx. 3000 for about 30 sec. then I get some warm air for a while. What could be the reason(s) for such behaviour? Where to look first? Not enough coolant? The main thermo vavle - which opens the main radiator failure? Failure of the valve which opens the inside heating radiator?
Thanks for your opinions! Regards, Klemen