Ideal Concord Super Series 4 Fault Codes

Regular Natural Gas 15-147 kW 1990-2005 Discontinued

GC Numbers: 41-415-4641-415-4741-415-4841-415-4941-415-5041-415-5141-415-5241-415-5341-415-5441-415-5541-415-5641-415-57

Replaced by: Evomax

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Most common fault codes

Code	Severity	Plain English	DIY
Burner fails to light	High	Your boiler is failing to light the gas burner and has gone into a safety lockout mode to prevent unburned gas from building up.	Engineer
Lockout light on	High	Your boiler has stopped itself for safety because it failed to light or stay running, and it needs to be manually reset.	Yes
Lockout warning light	High	Your boiler has tried to start but failed to light the flame, causing it to shut down for safety purposes.	Yes
Overheat light on	High	Your boiler has become too hot and has automatically shut itself down to prevent damage.	Yes
Safety temperature limiter	High	Your boiler has switched itself off because the water inside became too hot, likely due to a circulation issue.	Yes

Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.

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