Thanks for your reply Dave, but it’s not the main power on switch inside the top shut of the door, it’s the start button on the fascia. It has no resistance and doesn’t return to rest, just appears to float. I guess there was a return mechanism, but l need to know if that was in the switch, which l believe is on the start stop card, or if it is in the button s l can get the right part. Thanks again for your help