Hello Volvogemeinde… last year I had my V70 D5 MJ 2006 unlocked the heater and could use it cheerfully in the last days. At the beginning I always used the timer function. But because we drive a lot of short distance I took away from it due to the running times (40 min) and activated the heater manually (20 min before the start of the drive). The car was then always sufficiently heated. switch (after approx. 3 sec) with a 10 second long pin. GrrrkdaGrrrkdaGrrrkdaGrrrk…. During start-up and during operation, the heater is well audible, but even. sounds a little like the fans (outside) from the Combi market in our area 😉 Can anyone explain what the pin is about and whether I can/must live with it or possibly cause bigger damage? Greeting, gosar