Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Turn Hot Water Tap On
Preheat OFF
Remove the Pumps electrical cover
Remove the Pumps electrical cover
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure the voltage between the L and N terminals of the pump.
Expect Mains Voltage.
Expect Mains Voltage.
Isolate as per TOPs P4
and refit as necessary