• 0 Posts
  • 63 Comments
Joined 1 year ago
cake
Cake day: October 25th, 2023

help-circle














  • So I order a new fan switch and get that fitted only to find vcds still reads -47c and the fans still do not come on?

    Are you sure you replaced the correct sensor? I’ve seen this multiple times. People have just replaced the wrong sensor. Sometimes also causing problems by installing the wrong sensors as some VAG sensors can fit in place of each other but are electrically different.

    You calling a sensor switch points to some confusion here. A switch would just turn a fan on or off. Only a sensor would show temperature.

    If you’re sure you’re replacing the correct sensor new one is bad or you have wiring problem.

    I’m now thinking the radiator is blocked and maybe hot coolant isn’t getting to the fan switch location? Would this be possible?

    This would not cause the problem you have. Sensor would read somewhere between outside air temperature and coolant temperature if that’s what happens.




  • Even after activation it’s not something like dried coating. It will go around the system. So all that extra work isn’t worth it.

    Generally I really would advice against using stop leak. I have seen so many problems caused by it. Mostly on heater cores.

    Is it really that hard to replace? Normally all the older vehicles have been designed to be pretty easy to work on. Obviously with everything old, it adds to the work, but still. Historical Mercedes that I have worked on heating system had the heater core under the hood with just couple of bolts.