87 electronic temp control panel.

[HespelerC4]

Some of the buttons on my 87s electronic temp control have stopped working or are sporadic. Googling shows lots of references to taking unit out and cleaning contacts will fix this. Anyone do this before. Sounds straightforward but Haynes manual is vague as far as what has to come off or how to access two screws holding unit in place.
Appreciate some knowledge if anyone has done this.
Thx
[mob][/mob]