E193 — Pre-Circulation Fault

What does E193 mean?

This code indicates an issue detected during the boiler's initial pre-circulation phase. The display shows 'E1' alternating with '93'. This means the boiler is unable to establish proper water flow before ignition.

• Poor or no primary water circulation.
• Blockage in the system.
• Pump not running correctly during the pre-circulation check.

Click steps to track your progress.

1. 1

   Turn the selector switch fully anticlockwise to the 'Reset' position and hold for 5 seconds.

2. 2

   Ensure all system valves (e.g., radiator valves) are fully open.

3. 3

   Check if the system pressure is adequate (around 1.0-1.5 bar when cold).

4. 4

   If the error persists, contact a qualified heating engineer to investigate the circulation path.