What does the Worcester Bosch F0 (242 - 256) fault code mean?

Your boiler's main electronic brain is failing to communicate properly, which means it has safely shut itself down to prevent further damage.

How much does it cost to fix Worcester Bosch error code F0 (242 - 256)?

Typical repair cost for the Worcester Bosch F0 (242 - 256) fault is £250-450 including labour.

Control box or the HCM is defective.

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

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.