Time to bite the bullet and get the thing out my friend. It could be that the interlock has blown the main PCB? It could be the dryer heater has a reading less that 40 meg? In fact any insulation problem will cause it to throw toys out the pram anyway. I realise you didn’t drag it out but what reading did your Megger reveal?
thanks martin, i was clueless at the time so no insulation reading, last job of the day as per usual never an easy one, floor tiles went down after installation so im in for plenty of fun here.