The dryer stops 15 minutes after starting and shows an error — why?

In this case, the shutdown could be caused by the motor overheating. For a proper diagnosis, it matters which type of dryer we are dealing with: heat pump or resistance-based.

With a heat pump dryer, the problem is likely a motor fault or a clogged condenser that needs cleaning. A blocked water drain should also not be ruled out.

For older machines, the first thing to check is the start capacitor to verify it is working correctly.