Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
CH Demand
CH temperature control to max
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Run CH until MAX temp (75°C) reached or F76 lockout occurs.
Disconnect connector X20 from the on the PCB
Measure resistance across connections 13 (black) and 12 (black) at the disconnected connector X20.
Expected resistance closed circuit zero resistance.
| Isolate Mains Power to appliance as per TOP's P4 |
Disconnect connector X20 from the on the PCB
Measure resistance across connections 13 (black) and 12 (black) at the disconnected connector X20.
Expected resistance closed circuit zero resistance.
Isolate as per TOPs P4
and refit as necessary