Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Turn Hot Water Tap On
Disconnect the flow switch at the inline connector
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset lockout as necessary.
Allow the pump to run.
Measure the resistance between the 2 pins on the flow switch connector.
Expect continuity / zero resistance.
Is the resistance measured as expected?
Allow the pump to run.
Measure the resistance between the 2 pins on the flow switch connector.
Expect continuity / zero resistance.
Is the resistance measured as expected?
Isolate as per TOPs P4
and refit as necessary