BoilerFaultCodesIdeal 1 to 24 Fault Code
Also written as 1TO24 — same fault.
The Ideal 1 to 24 fault code means: your boiler has detected a general internal fault that prevents it from operating, and because these codes cover a wide variety of issues, a qualified engineer must investigate.. It appears on 3 Ideal models in our database.
Technical description: Fault codes numbered 1 to 24 are displayed where applicable. In this event contact Caradon Plumbing Limited.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A cover plan would handle faults like 1 to 24: no call-out fees, no surprise bills.
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Ideal models that show the 1 to 24 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 1 to 24 fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
- Ideal Concord CXA 40-120 manual (PDF)
- Ideal Concord CXC 48 116 manual (PDF)
- Ideal Concord Cxdi manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026