What does the Worcester Bosch T3 fault code mean?

Your boiler is checking if the pump is working correctly to move water through the system, but it has not detected the required flow.

How much does it cost to fix Worcester Bosch error code T3?

Typical repair cost for the Worcester Bosch T3 fault is £220-450 including labour.

Check that your radiators are bled and all radiator valves are fully open

Pump test – checking the basic pump

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Each noise points to a different fault.

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.