I first had an F01 code, I then replaced the main board- after that it would run for one minute- heat up , then stop with a F22 code. I then replaced the thermistor and fuse. I am still getting the same result- runs for one minute,the heating elements get bright red and then machine stops and shows F22 code????? what am I missing??

Hello,

I have seen that before and unfortunately, that means there is a short in the wiring harness and you will need to replace the wiring harness on the machine.