Re: Miele T234C Condenser Tumble Dryer
Make sure you test it on “timed drying” as most of these will only heat for a few minutes (in auto) only if they sense the clothes are still damp. Check that the sensors (paddles) in drum are clean. These if they are covered in dirt & dust prevent the heater coming on in auto’ programmes. If you take off the top you will see a carbon brush running on a slip-ring. The contacts of the paddles on outside of drum should be checked & cleaned if necessary.
Thermostats beside heater would be my first thought to check & for blockages.