Hi smwdrtwin, what model Mitsu are you trying to get into? I've got some Mits service info laying around that might have a procedure to get into the service menu. Just email me with a model# and I'll take a look.
I can only get one code to work, but do NOT advise using it...
MENU 1 2 3 (.............STOP HERE!!!!!! ENTER will reset system to factory defaults. HOME will exit this.)
will reset system to defaults. This is a very dangerous code if do not have the other code to get to the service menu. I have tried all the codes I could find on the internet, but still cannot access the service menu.