Ideal L2 Fault Code (Logic System)

Safety disclaimer

Fault code summary

Manufacturer

Ideal

Fault code

L2

Fault type

Ignition, Flame failure, Condensate, Gas supply

Severity

high

Reset

Not specified

Applicable models

Logic System

Quick answer

Ignition lockout.

What does this fault code mean?

Ignition lockout.

Common causes

• Blocked condensate pipe.
• Gas supply unavailable.

Symptoms

• The boiler displays L2 and may lock out.

What can the homeowner safely check?

• Check the condensate pipe for an obvious blockage without dismantling anything.
• Check whether other gas appliances work and whether the gas supply is on at the meter.

Boiler reset information

Reset information was not provided in the verified manufacturer source. Do not repeatedly reset an unresolved fault.

When should I call an engineer?

Contact a suitably qualified heating engineer when the fault persists, the boiler locks out, or the manufacturer instructions do not resolve it. For gas appliance work in the UK, use a Gas Safe registered engineer.

Engineer diagnosis

• Investigate condensate discharge, gas supply and ignition/flame detection.

Applicable boiler models

• Logic System

Related fault codes

• F1 — Logic System

  Low water pressure.

  Read fault code
• F2 — Logic System

  Flame loss.

  Read fault code

Manufacturer documentation

L2 — Ignition Lockout — first step is to check your boiler’s condensate pipe for blockages ... check whether other gas appliances ... are working.

Last verified

2026-09-12

Frequently asked questions