Don't hesitate to call the Mfg.
Try unplugging the digital unit with the power on, but unplug at the connection to the cabinet with the small wire plug.
Did you pre-season the MES and did the MES achieve the recommended 275 temp to pre-season?
Did you buy the MES from a local store, if you already called Mfg, and no joy, then don't hesitate to exchange for new MES at local store.
If you have an electric multimeter, and know how to use it check the amps at the outlet you are using. Most home outside outlets are 15 amps, some even 20 amp. If the outlet is 10 amps and cheap wire, you might have a problem there.