Nah, let him blow himself up lol.
Seriously though, I’ve been doing what I do for 30 years.
If I need something doing to do with plumbing, who do I call?......YOU!
If he wants to get a car mechanic to fix his oven, fair play to him :)
WRONG.
There will be a live, a neutral and an earth.
The neutral will be linked through all the components of the cooker.
The live will be switched from the selector switch.
FFS..... stop fvcking about and get someone who knows what they’re doing have a look.
Jesus Christ.....your kitchen is an...
Or the shaft of the motor is slightly too long and the fan blade is jammed against the front panel.
Take the front panel off and see if the fan turns. It’s only a magnet, slightest little resistance can stop it turning
It always pays to actually TEST components before throwing money away replacing perfectly good parts.
I appreciate not everyone (your son) will have access to test equipment, or indeed knowledge, that I personally have accumalated after actually doing the job for 30 years, but you DIYers really...