Hi Simon,
Which Type of Microcentaur is it? The new style is Grey with a red LED display, the older style is blue or orange case work with a manual timer.
This is quiet a common fault in the old style. It usually points to the lid lock triac. There are two T0-220 packages on the pcb one is an SCR for the motor drive the other the lid lock triac.
On the new style its most likely to be a sticking solenoid.
If you still need one I could email a PDF of the circuit diagram to you.
Hope this helps
Colin
colin@djblabcare.co.uk
