BoilerFaultCodesIdeal Logic Max COMBI2 C24 Fault codes & diagnostics
0 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Combi Natural Gas 2022-present
GC Number 47-387-03
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The fault code is already on your display
Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →
Status & diagnostic codes 4 operating states & engineer diagnostics
Not faults — these are normal operating states. Tap to expand.
4 operating states & engineer diagnostics
Not faults — these are normal operating states. Tap to expand.
24 Diagnostic Your boiler is currently operating normally and is communicating its intended heating power level to the control system. 30 Diagnostic Your boiler is displaying a technical configuration code indicating it is not correctly communicating its intended heating power to the system. 35 Diagnostic Your boiler is undergoing a routine internal self-check to confirm it is operating at its correct heating power level, which is a normal part of its software cycle. U Diagnostic Your boiler is currently in a manual service mode used for filling or venting the system and will not operate normally until this mode is exited.
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