Ursprünglicher Beitrag von: Mark Burden ,
I'm assuming that you are saying 90 deg C? correct? If so that is 195 deg F, since you say the heater doesn't work my guess is that the thermostat some time in the past taken out or has failed completely. With no thermostat the water never has time to slow down to make the heater work, as well spend enough time in the radiator to cool off. There by causing a sensor to tell the computer that it's getting hot and to shut it down. I'd get a new thermostat for the recommended temp and see if that helps.