Whirlpool Smart Wall Oven/Microwave - F1E6 - Microwave Magnetron - Magnetron or Inverter Board

[DeeOne1]

I'm having issues with my Whirlpool Smart Combination Wall Oven with Touchscreen Model: WOC75EC0HS with error: F1E6 - Microwave Magnetron. I had my home warranty company send out a tech and they diagnosed it and said the Magnetron and Inverter Board needed to be replaced. They could only replace the magnetron due to their dolly not being able to pall out the unit and reimbursed me for the inverter board. He tested the unit and it still wasn't working with the replaced magnetron.

 

I hired my own technician to take a look at it and he pulled the unit out and started looking at the voltages on the board. He said voltage looks okay and he tested the unit out. It started working again with no error code. Heated a cup of water, paper towel and it was heating up. The only weird thing is when the unit was not in the cabinet and was on an appliance cart being tested, the time on the smart display would freeze 2 seconds in. He said it was really weird because the only thing he did was check voltage and reset wire plugs to the boards just in case. A little bit of flickering happening on the display of the unit as well. He said it could possibly be the control board. He puts the unit back in the cabinet and the unit starts working again with no issues (no time freezing issue) which he said was weird. With the unit working again mysteriously he had nothing to fix.

 

The next day I use the microwave and I get the F1E6 - Microwave Magnetron error again. No heat to the microwave. I call the technician that I hired myself back and he said it could either be the control board or the inverter board (he said it's probably not the magnetron since that was replaced by my home warranty company).  He's hesitant to replace the inverter board because he said when they go bad they usually don't intermittently work as was the case with my microwave.  Any opinions on whether it is the inverter board or the control board? 

[ServiceTech_Daniel]

It's most likely the inverter board. I've replaced many over the years with this same issue .