Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove connector X5 from the PCB
Remove the connector from the low pressure sensor
Remove the connector from the low pressure sensor
Measurement:
Measure the resistance of each of the wires on connector X5 (Pins 7, 8 and 9) to the low pressure switch connector.
Expect continuity / zero resistance on each test.
Also visually inspect the condition of the harness and its connectors.
Are the resistances measured as expected and is the harness in good condition?
Expect continuity / zero resistance on each test.
Also visually inspect the condition of the harness and its connectors.
Are the resistances measured as expected and is the harness in good condition?
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Isolate as per TOPs P4
and refit as necessary