Condensate pump: Off Green / Flashing Red — Pump blocked and alarm level exceeded

What does Off Green / Flashing Red mean?

The Worcester Bosch Greenstar CDi Boiler's condensate pump shows no green light but a flashing red light, indicating that the pump is blocked and the condensate level has also exceeded the alarm level.

• Severe physical blockage at the pump's inlet
• Accumulation of dirt or debris in the pump tank combined with high condensate level

Click steps to track your progress.

1. 1

   Turn off the power to the condensate pump immediately.

2. 2

   Thoroughly inspect the tank pump inlet and the entire pump mechanism for blockages.

3. 3

   Remove all dirt and debris from the pump and tank.

4. 4

   Restore power to the pump and verify if the fault clears. If it persists, contact a qualified heating engineer.