What does the Vaillant d.69 fault code mean?

Your boiler is struggling to light itself correctly and has failed multiple attempts to start up.

How much does it cost to fix Vaillant error code d.69?

Typical repair cost for the Vaillant d.69 fault is £100-350 including labour.

Check if your gas supply is turned on at the meter

Number of unsuccessful ignitions at 2nd attempt

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.

Older boilers — thermocouple, draught, gas supply.

Safety-critical — turn off, read this.