Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove plug from diverter head
Measurement:
Measure the resistance between each of the points listed
in the table below, diverter head pins are numbered on the casing for ease of testing.
The readings measured depend on the position
of the diverter valve spindle.
Spindle extended = DHW position
Spindle retracted = CH position
Resistance readings expected should be
approximately as per the table below:
in the table below, diverter head pins are numbered on the casing for ease of testing.
The readings measured depend on the position
of the diverter valve spindle.
Spindle extended = DHW position
Spindle retracted = CH position
Resistance readings expected should be
approximately as per the table below:
| Pin | |
| 1 & 2 (CH position) | |
| 2 & 3 (CH position) | |
| 1 & 2 (DHW position) | 2 & 3 (DHW position) |
Isolate as per TOPs P4
and refit as necessary