Error 125 - Primary Circulation Fault

What does 125 mean?

This error code indicates a problem with the primary circulation of water within the boiler or heating system. The boiler's display will show the spanner symbol and the numeric error code.

• Blockage in the primary heating circuit
• Circulation pump malfunction or blockage
• Insufficient water flow detected by the boiler

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

   Ensure all radiator valves are open and there are no closed isolation valves in the system.

3. 3

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