I recently removed the original oven/stove combo off my 78 GB42 and replaced with a combination convection oven/microwave. The new unit works great when on shore power and dont have any reverse polarity. I even used a plugtester to check the circuit and it indicated that there are no faults with the circuit. When i run the generator the microwave doesnt even come on and I get a reverse polarity when I turn on the switch. When I check the circuit again, I get the that ground and neutral reversed?? all other circuits are fine. I plugged the oven into a an outlet with an extension cord and it works fine.
So... what do I check next. Pretty baffled on this one.
GB 42 589