E118 — Water pressure too low

What does E118 mean?

The boiler has detected that the primary heating circuit water pressure is too low, less than 0.5 bar.

• Insufficient water in the heating system.
• A leak in the heating system.
• Faulty pressure sensor.

Click steps to track your progress.

1. 1

   Check the system water pressure on the boiler's gauge.

2. 2

   Re-pressurize the boiler system using the filling loop until the pressure is within the recommended range (typically 1-1.5 bar).

3. 3

   Check for any visible water leaks from radiators, pipes, or the boiler itself.

4. 4

   If the problem persists after refilling, a qualified technician should inspect the system for leaks or a faulty pressure sensor.