BoilerFaultCodesIntergas 24 Fault Code
The Intergas 24 fault code means: your boiler has sensed that the water returning from your radiators is hotter than the water leaving the boiler, which usually means there is a circulation problem or a sensor fault.. It appears on 10 Intergas models in our database.
Technical description: Return sensor temperature > flow sensor temperature.
What causes the Intergas 24 fault?
This fault occurs when the boiler's internal sensors detect that the system is operating in reverse, with the return pipe being hotter than the flow pipe. The most common reason is a circulation failure, often caused by a faulty pump or a blockage in the heat exchanger that prevents water from moving through the boiler correctly. It can also be triggered if one of the temperature sensors has failed and is providing an incorrect reading to the control board.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Intergas models that show the 24 fault code
Click a model for the full fault code list and model-specific repair notes.
- Combi Compact Eco RF Repair: £90-220
- Combi Compact HRE 24/18 Repair: £90-220
- Combi Compact HRE 28/24 Repair: £90-220
- Combi Compact HRE 36/30 Repair: £90-220
- Combi Compact HRE OV Repair: £90-220
- Combi Compact HRE SB Repair: £90-220
- Compact HRE OV Repair: £120-190
- Rapid 25 Repair: £90-180
- Rapid 25 32 Repair: £90-180
- Rapid 32 Repair: £90-180
Source
Intergas 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 27 April 2026