BoilerFaultCodesIntergas 20, 21, 22, 23, 24 Fault Code
Also written as 2021222324 — same fault.
The Intergas 20, 21, 22, 23, 24 fault code indicates a fault on your boiler. It appears on 2 Intergas models in our database.
Technical description: Sensor fault S2
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 20, 21, 22, 23, 24: no call-out fees, no surprise bills.
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Intergas models that show the 20, 21, 22, 23, 24 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Intergas 20, 21, 22, 23, 24 fault code information on this page is sourced and cross-checked against the official Intergas service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026