What does the Worcester Bosch D4 271 fault code mean?

Your boiler has sensed that the water inside is heating up too quickly or isn't circulating properly, causing it to shut down to prevent overheating.

How much does it cost to fix Worcester Bosch error code D4 271?

Typical repair cost for the Worcester Bosch D4 271 fault is £120-350 including labour.

Check if your heating system pressure has dropped and top it up if necessary

Temperature difference between flow and safety sensor exceeds limit

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.

Work through these before the call-out.

Lockout fault with a reset-needed pattern.