Hi, welcome to Just answer
Please tell me the age of this unit
Approximately 6 years old
Is it also making any unusual sound ?
OK, prior to this it was working fine ? I mean heating fine ?
Yes, we usually use it for porridge in the morning and that turned out OK
OK, so for those 3 seconds the control lights up and then it goes completely dead ?
Yes it just switches off. When we tried it two or three times the "appliance cooling" sign came on.
OK, the problem seems to be with the magnetron that is bad and needs replacement...after few seconds it should kick in as it is responsible to create heat...
as it wont start so that microwave turns itself off
this is not a DIY as the appliance has high voltage even when unplugged... replacement will cost around £90 + labor
You can get back to me if you need any assistance and I will help with no additional charges.....Is there anything else I can assist you with today ?
No that's fine. I shall now weigh up the options of getting the repair done or replacing the oven.