What does E55 mean?

The boiler's main control board (PCB) has not been set or calibrated, which is necessary after replacement or certain system changes.

• New PCB installed but not calibrated.
• Reset of parameters requiring re-calibration.

Click steps to track your progress.

1. 1

   This error indicates that the boiler needs to enter a 'Calibration Function'.

2. 2

   This is an advanced setting and should typically be performed by a qualified technician or installer.

3. 3

   Contact a service technician to calibrate the PCB settings.