Candy tumble dryer stops after approximately 30 min with beep sound

Hi,

Candy GO DC 67 tumble dryer stops after approximately 30 min with beep sound (“start LED” is blinking, and “0/1 LED” is still).
As I push the Start button nothing happens except the click sound of relay and the house room light intensity goes a little bit blink … is draining some power during relay click.
When I unplug/plug power and push the “Start” button it starts normally and is running for a few minutes more. If I let it cool it works for a longer period.

I checked all the components heater, door switch, both NTC sensors, both thermostats, filters are clean, eliminated pressure switch with short wiring, the biggest relay on the system board is OK.

Can you please help me, I need a schematic or wire diagram of a system board. I suspect maybe on the other two system board relays or some elements. The capacitors looks as new.

Thank you and have a great day!
Regards