Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove diverter head from body (to view spindle position)
Remove electrical connector from diverter head
Remove electrical connector from diverter head
Measurement:
Test 1:
Measure the resistance between pin 1 and pin 2.
Expect approximately 7.9 kOhms if the valve is in CH position
and open circuit if in DHW position.
Test 2:
Measure the resistance between pin 3 and pin 2.
Expect approximately 7.9 kOhms if the valve is in DHW position
and open circuit if in CH position.
Note: If the valve is half way between the positions it would be acceptable to get 7.9 kOhms on both tests 1 and 2.
Measure the resistance between pin 1 and pin 2.
Expect approximately 7.9 kOhms if the valve is in CH position
and open circuit if in DHW position.
Test 2:
Measure the resistance between pin 3 and pin 2.
Expect approximately 7.9 kOhms if the valve is in DHW position
and open circuit if in CH position.
Note: If the valve is half way between the positions it would be acceptable to get 7.9 kOhms on both tests 1 and 2.
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Isolate as per TOPs P4
and refit as necessary