What does the Ariston L.E.D. I fault code mean?

Your boiler is failing to light the internal flame, which means it cannot provide you with heating or hot water until the issue is fixed.

How much does it cost to fix Ariston error code L.E.D. I?

Typical repair cost for the Ariston L.E.D. I fault is £120-250 including labour.

Ignition Failure: This indicates ignition failure when a flame is not detected within 7 seconds of starting an ignition sequence.

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

Almost always a stuck diverter valve on combis.

Lockout fault with a reset-needed pattern.

Older boilers — thermocouple, draught, gas supply.