Set Appliance State:

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

Observation:

As the CH temperature approaches target temperature the boiler should either reduce fan speed to maintain temperature or shut down.
Does the boiler reduce fan speed / shut down as CH reaches temperature?
Note:
To reduce time taken for this test you may wish to turn off some radiators.