Before attempting to perform any type of service inside the unit, DISCONNECT THE POWER TO THE CONTROL!!!
Loosen up, but don’t remove, the phillips head screws at each corner (4 total).
Locate the screwdriver slot at the bottom center of the faceplate.
Insert a straight blade screwdriver into the slot and pry the faceplate out.
Once the faceplate is free of the bottom groove, it will pivot upwards. This will allow access to the field serviceable parts of the control.
To close the cover, make sure all of the wires are tucked into the control. Slide the top edge of the faceplate firmly into the top groove and press on the bottom of the faceplate until it snaps securely into the bottom groove .
The last step is to retighten the 4 phillips screws.