What does the Alpha 49 fault code mean?

Your boiler has sensed that the water circulating back into it is too hot, causing it to shut down to prevent damage to its internal components.

How much does it cost to fix Alpha error code 49?

Typical repair cost for the Alpha 49 fault is £150-300 including labour.

Return sensor has detected a high temperature (90°) on the heat exchanger return circuit

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.

Safety-critical — turn off, read this.