What does the Vaillant F24 fault code mean?

Your boiler has detected that the water returning to it from your radiators is dangerously hot, causing it to shut down to prevent damage.

How much does it cost to fix Vaillant error code F24?

Typical repair cost for the Vaillant F24 fault is £150-350 including labour.

Central heating return t° >90°C

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.

Sludge build-up — needs flushing, not bleeding.

7 signs repair isn't worth it anymore.