Intergas Combi Compact HRE SB Fault codes & diagnostics

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

System Natural Gas 2008 onwards Discontinued

Replaced by: Xtreme SB

Download the Intergas Combi Compact HRE SB manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

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Severity at a glance

Each cell = one fault code. Hover to identify.
12 High

All 12 documented codes

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10

Your boiler has detected a problem with its primary temperature sensor and has stopped working as a safety precaution.

High Engineer only £90-160

Parts commonly replaced

  • Flow temperature sensor (S1)
  • Sensor wiring harness

Related codes

11

Your boiler has stopped working because it is unable to accurately measure the temperature of the water inside the unit due to a faulty sensor.

High Engineer only £120-200

Parts commonly replaced

  • Flow temperature sensor (S1)
  • Wiring harness

Related codes

12

Your boiler has detected a problem with its primary temperature sensor and has stopped working as a safety precaution.

High Engineer only £90-160

Parts commonly replaced

  • Flow temperature sensor (S1)
  • Sensor wiring harness

Related codes

13

Your boiler has detected a problem with its primary temperature sensor and has stopped working as a safety precaution.

High Engineer only £90-160

Parts commonly replaced

  • Flow temperature sensor (S1)
  • Sensor wiring harness

Related codes

14

Your boiler has detected a problem with its primary temperature sensor and has stopped working as a safety precaution.

High Engineer only £90-160

Parts commonly replaced

  • Flow temperature sensor (S1)
  • Sensor wiring harness

Related codes

20

Your boiler has detected a problem with the temperature sensor that monitors the water returning to the unit, causing it to stop running for safety.

High Engineer only £90-180

Parts commonly replaced

  • NTC Temperature Sensor (S2)
  • Sensor wiring harness
  • External sensor
21

Your boiler has detected a problem with the temperature sensor that monitors the water returning to the unit, causing it to stop running for safety.

High Engineer only £90-180

Parts commonly replaced

  • NTC Temperature Sensor (S2)
  • Sensor wiring harness
  • External sensor
22

Your boiler has detected a faulty temperature sensor, which is preventing it from monitoring its internal heat levels correctly and stopping it from firing up.

High Engineer only £120-200

Parts commonly replaced

  • Domestic Hot Water (DHW) sensor
  • Wiring harness

Related codes

23

Your boiler has detected a problem with the temperature sensor that monitors the water returning to the unit, causing it to stop running for safety.

High Engineer only £90-180

Parts commonly replaced

  • NTC Temperature Sensor (S2)
  • Sensor wiring harness
  • External sensor
24

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.

High Engineer only £90-220

Parts commonly replaced

  • Flow NTC sensor
  • Return NTC sensor
  • Circulation pump
29

Your boiler has detected a failure in an internal safety switch that controls the gas supply, meaning it cannot safely ignite.

High Engineer only £250-450

Parts commonly replaced

  • Printed Circuit Board (PCB)
  • Gas valve wiring loom

Related codes

30

Your boiler has detected an internal electrical fault with the part that controls the gas supply, meaning it has safely shut itself down to prevent unsafe operation.

High Engineer only £250-450

Parts commonly replaced

  • Main control board (PCB)
  • Wiring harness

Related codes

1 operating states & engineer diagnostics

Not faults — these are normal operating states. Tap to expand.