Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance

For access behind the control panel
Release the fixing screw located at the top of the case front panel and lift the panel upwards from its locating pins and then forwards from the boiler. Remove the two fixing screws that secure the control panel and lower the panel.

Observation:

Disconnect connector X7 from the PCB.
Check resistances across the connections at the
disconnected connector as per table below:
Test

Leads

Expected Resistance(Ohms)

1.

Orange and black leads

Infinity (O L on standard meter)

2.

Black lead and Earth

Infinity (O L)

3.

Orange lead and Earth

Infinity (O L)