Set Appliance State:

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

Observation:

Use the rocker switch on the right hand side of the boiler
fascia to attempt to reset the boiler from ignition lockout.
Does the fan now run?
BOILER RESETS AND FAN NOW RUNS
BOILER RESETS FAN STILL DOES NOT RUN
BOILER DOES NOT RESET OR BOILER RESETS AND RETURN TO FAULT CODE