Hello together. I am currently driving a Volvo 850 Built. 1996 automatic 2.5L 144 hp with almost 190.000 km on the clock. My problem is: For about a month I have the problem that the engine temperature is often too high for my taste, usually it stands at about 3 o’clock and then moves no more, unfortunately this is only the case with me on the highway. In the city with Stop and Go it rises to about 13:30 to 14 o’clock and sinks only with a few hundred meters of free drive Unfortunately, I can’t say exactly when it first occurred, but in recent times, thermostat, coolant sensor, cooling water and candles have come new. At the beginning of last year a new timing belt plus WaPu, which also definitely promotes. What I noticed is that since that time the radiator fan is no longer controlled. I made a DIY turn signal box for the pseudo OBD II, which I can also control the fan via the motor electrics. rt also so far, both stages can be tested normally. Only the fan does not work at high temperature, nor when using the air conditioning system, what it definitely did before. Now the question is: Is it possible that the suction motor cannot use the thermostat of the R or T5 (opens at approx. 87°C and that of the suction cup only at 92°C) and thus the flow is too fast and the water is not sufficiently cooled and then heat points collect? I have already tested the temperature sensor. The fan starts at the highest level and runs three minutes after the ignition is switched off. The motor lamp also lights up with the Lambda symbol. Engine temperature indicator in the instrument cluster remains unchanged. Maybe someone knows what it can be ??? Have measured everything I can find, resistance from the temperature sensor sinks, the warmer the water becomes. Relay works and also has voltage. Control line from the control unit also has 12V on mass and has passage.