Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove the harness from J10 of the main PCB
Undo the 4 screws and remove the display PCB from the
control panel leaving the harness attached
Place the plug from J10 conveniently near the reset switch on the board
Undo the 4 screws and remove the display PCB from the
control panel leaving the harness attached
Place the plug from J10 conveniently near the reset switch on the board
Measurement:
Test 1:
Measure resistance across the left hand pin of the switch and the 3rd pin
on the lower set of connections of the plug removed from J10.
Test 2:
Measure resistance across the right hand pin of the switch and the 4th pin
on the lower set of connections of the plug removed from J10.
Measure resistance across the left hand pin of the switch and the 3rd pin
on the lower set of connections of the plug removed from J10.
Test 2:
Measure resistance across the right hand pin of the switch and the 4th pin
on the lower set of connections of the plug removed from J10.
Isolate as per TOPs P4
and refit as necessary