Set Appliance State:

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

Observation:

Reset boiler.
This fault code is usually shown when the appliance
was turned off while a different fault code was present.
If a different fault code is shown click HERE to return to fault code page.
If fault code E131 reoccurs or appliance will not reset click HERE.
If appliance resets and enters standby click HERE to diagnose using the full model.