Hello from JA
My name is Woody.
I will be glad to assist you today.
I have been servicing ALL Major Brands of Appliances for 35 Years,
and have over 100,000 in home repairs and over 80,000 internet repairs under my belt.
Make sure the outlet the unit is plugged into is properly polarized and grounded.
If replacing the MCU did nothing to fix the issue .
I recommend top replace the CCU
The link below is to the part you will need from a highly recommended company rated A+ with the Better Business Bureau.
They offer a 100% money back guarantee, EVEN ON INSTALLED ELECTRICAL PARTS, for an entire year!
They are the only company to allow returns on installed parts for a refund and offer a FULL ONE YEAR WARRANTY!
Check polarity to your outlet LARGE blade to ground 0 volts, small blade to ground 110-120 volts,small blade to LARGE 110-120 volts.
this is very important with electronic controls
If you have any questions just reply back.