What does the Keston E 04 fault code mean?

Your boiler has lost its memory of a previous error because it was switched off and back on again while it was already trying to protect itself.

How much does it cost to fix Keston error code E 04?

Typical repair cost for the Keston E 04 fault is £120-250 including labour.

Power has been reset whilst boiler was in lockout

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

Lockout fault with a reset-needed pattern.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.