What does the Vaillant Er.2 fault code mean?

Your boiler is failing to light the flame or is unable to detect that it has successfully turned on, so it has shut itself down as a precaution.

How much does it cost to fix Vaillant error code Er.2?

Typical repair cost for the Vaillant Er.2 fault is £120-250 including labour.

Ignition electrode / Flame sensing electrode

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.