Bosch Wall Oven heats ONLY with door open. HBL542AUC

[CMA]

Hey guys. Just FYI I am an appliance tech. Been doing with for about 10 years. I've got kinda a weird one. I have a Bosch Wall Oven model HBL542AUC that heats only when the door is opened. When you close the door, the lights go off and it stops heating. Upon opening the door, the lights go on, the convection fan starts up and it starts to heat. The door hinges and door switch have all been replaced. It had this problem before I changed these parts (they were replaced because someone fell on the door and bent it damaging the door switch). We had this same problem about 10 years ago with one of these but I am unable to find the job in our computer system. If I remember correctly, it might have been the small relay board attached to the back of the Oven Control Board. Anyone run into this before? Thanks.

[MoTeD]

Try posting this in the tech help section. 

https://appliantology.org/forum/4-appliance-repair-tech-forum/

[CMA]

5 minutes ago, MoTeD said:

Try posting this in the tech help section. 

https://appliantology.org/forum/4-appliance-repair-tech-forum/

I tried but there is no option to make a new post. I assume that I need to sign up for a $197.00 membership. This is the first time in 10 years that I've needed this site therefore it just doesn't justify me spending $197.00 for something that I will very rarely use.

[Movingshrub]

@CMAWhat was the resolution? I am running into the same issue on a different Bosch oven. The door microswitch passes a bench test. I'm leaning towards the relay board, since I can't find faults with anything else on the oven that is in the circuit for heating. 

The oven only heats when the door is open. When on the thaw setting (no heat, only fan), the door has to be open otherwise no power, which leads me to assume the issue isn't in the heating or temp sensor part of the circuit.  

[dfphoto]

I think  you should be rethinking your troubleshooting process... does it make sense it would work on open