Error 55 - Calibration Required

What does 55 mean?

This error code indicates that the boiler requires a calibration process. The boiler's display will show the spanner symbol and the numeric error code, signifying that system adjustments are needed.

• Initial setup or recent component replacement requiring calibration
• Internal parameter drift over time
• Boiler operating outside optimal parameters

Click steps to track your progress.

1. 1

   Press the 'R' (reset) button firmly for several seconds to attempt to clear the fault.

2. 2

   If the error persists, turn off the boiler's electrical supply at the isolation switch for 30 seconds, then turn it back on.

3. 3

   If the fault code reappears, contact your installer or the Baxi service division ('heateam') for assistance, as calibration requires specialized tools.