Locate and remove the selector switch.
Some selector switches have a delicate reset mechanism. Inspect
the switch before removing it to identify any part that requires
gentle handling. The selector switch is usually fastened to the
door frame with two or three screws.
The selector switch has a pair of
terminals associated with each cycle button. Pull the wires off
one pair of terminals (be sure to replace them before moving to
the next pair of wires). The wires are connected with slip on
connectors. Firmly pull the connector off of the terminals (do
not pull on the wire). You may need to use a pair of needle-nose
pliers to remove the connectors. Inspect the connectors and the
terminals for corrosion. If the connectors are corroded they should
be replaced.
