Set Appliance State:

Mains Power Off
CH Demand
Gas On
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Boiler ON/OFF switch ON.
Allow boiler to ignite and start to heat system.
Remove heating demand.
Does fan run for approximately 15 seconds and pump run for approximately 4 minutes after burner has shut down?