Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
CH Demand
Attach FGA Temperature Clamp to Flow Pipe just above the CH Sensor Position
Preheat Switched OFF (ECO in Display)
Set CH Stat to MAX
Allow boiler to run on CH and allow to reach temperature and burner to shut off
NOTE:The system may reach temperature quicker if you reduce the load by shutting off some of the radiators
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Measurement:

Boiler temperature should reach approx 85-90 °C on FGA before shutting down.
According to boiler operation choose from the options below.