Ideal Logic + Heat 18 Fault codes & diagnostics

3 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Natural Gas 2010-2016 Discontinued

GC Number 41-409-99

Download the Ideal Logic + Heat 18 manualThe official installation and service manual (PDF), the document these fault codes were read from. PDF

Other editions of this manual (the one above is UIN 206064 A05): UIN 206064 A08 (PDF) Manufacturers revise a model over the years. If your boiler is older than the manual above, an earlier edition may match it better.

The fault code is already on your display

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

Just want the most common Ideal Logic + Heat 18 faults?

The top 6 problems in plain English — with causes, DIY checks and repair costs.

Fault codes

All 3 documented codes

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