Set Appliance State:

Mains Power Off
CH Demand
Selector switch to heating and hot water position
CH temperature selector to maximum
DHW temperature selector to minimum
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Allow boiler to fire under heating demand.
Remove heating demand via room thermostat or clock.
Does the pump continue to run for approximately 3 minutes?