Set Appliance State:

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

Observation:

Allow boiler to run and ignite for CH demand.
Boiler should run up to temperature (approx 82°C to 88°C flow temperature shown on display) and then shut down or modulate to maintain temperature.
Does the boiler operate as above or does overheat fault code reoccur?
Note:
To reduce time taken for this test you may wish to turn off some radiators.