Set Appliance State:

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

Observation:

Tap the      button, this will show current system pressure.
As the system is now hot it is normal for it to have increased by 0.5 to 1.0 bar but it should not be near or above 3.0 bar.
Has the system pressure remained stable?