Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove the connector from the flame sense electrode
Remove connector X12 from the PCB
Remove connector X12 from the PCB
Measurement:
Measure the resistance of the rectification lead.
Expect continuity / zero resistance.
Also visually inspect the condition of the harness
and its connectors.
Note:
1. Rectification lead does not have to be removed for test but is shown removed for clarity.
2. The rectification lead may differ in appearance from the one illustrated but the resistance test is carried out in the same way.
Expect continuity / zero resistance.
Also visually inspect the condition of the harness
and its connectors.
Note:
1. Rectification lead does not have to be removed for test but is shown removed for clarity.
2. The rectification lead may differ in appearance from the one illustrated but the resistance test is carried out in the same way.
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Isolate as per TOPs P4
and refit as necessary