Hello I have a volvo s60 d5 Bj.2003 163 ps My standing heater has always worked well until it at once with the timer has not worked anymore I have read out error and it was in it (overheating protection signal too high .) then I have tested all components like water pump, burner blower,k pump,glow candle,burner self and cleaned.I have bought with my friendly a new heat protection and the same problem still. Then I am d came up that in my interior a loud water to roll around is when the standing heating is run one to two minutes without engine. I initially thought air in the cooling circuit also to ventilate brobed but there was no air inside. I got it the standing heating is getting so hot that the water starts to cook. The water pump of the standing heating works but. The funny is the standing heating works when the engine runs. My volvo dealer means that the outsider Emperatursensor is broken but inside the interior the display works hair exactly . And in the Vida it shows me an outside temperature sensor -126 degrees Celsius measures Is there a second temperature sensor for the motor management ? Please penetrate around HELP !!!!!!!