Detecting overheating of heater for vehicle involves checking if temperature parameter is in defined range if certain state is indicated, detecting overheating if temperature parameter outside range

摘要

The method involves determining a parameter characterizing the operating state of a heat source (12). It uses the output of a first sensor arrangement (18), and determines a second parameter related to the temperature of a second sensor arrangement (34) near a fluid outlet (32). The method involves checking if the second parameter is in a defined range if the first parameter indicates a certain state and detecting overheating if the second parameter is outside the range. AN Independent claim is also included for a heater.