F89 Fault — Pump not connected or incorrect pump

What does F89 mean?

The boiler's pump is either not connected, connected incorrectly, or the wrong type of pump is installed. A short circuit in the cable harness is also a possible cause.

• Pump not connected
• Pump connected incorrectly
• Incorrect pump connected
• Short circuit in the cable harness

Click steps to track your progress.

1. 1

   Check that the pump is securely and correctly connected.

2. 2

   Verify that the correct type of pump is installed for your boiler model.

3. 3

   Inspect the cable harness for the pump for any signs of damage or short circuits.