i need circuit diagram for bosch hthb13?

If your friend is an experienced electrician he should be able to test the elements, fan etc and with a bit of basic fault finding skill work out what is wrong without the need for a wiring diagram. If he can't fault find an appliance then you need a different electrician not a wiring diagram.

George
March 2015

There may be separate heating elements for the fan oven function and the conventional oiven function.

If that's right for your oven and the fan oven element has failed, you will pretty much have th esymptoms as you seem to say (I'm a bit worried about interpreting from your English, though).

It'll be easy enough for your electrician friend to check the element and shouldn't be too much for a spare. Try www.espares.co.uk

X
March 2015