BoilerFaultCodes 0
Standby
Intergas Combi Compact HRE SB Fault codes & diagnostics
44 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
PDF
The fault code is already on your display
Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →
Severity at a glance
Each cell = one fault code. Hover to identify. 11 High
33 Unrated
Just want the most common Intergas Combi Compact HRE SB faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes
All 44 documented codes
Tap any card for details
0.0
Low system pressure
1
Heating
2
Hot water
3
Pump overrun
4
Fan pre-purge
5
Ignition
6
Burner on
7
Fan post-purge
8
Gas valve error
Showing 11–20 of 44
9
Lock-out (General error)
10, 11, 12, 13, 14
Sensor fault S1
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.
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.
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.
Your boiler has detected a problem with its primary temperature sensor and has stopped working as a safety precaution.
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.
Your boiler has detected a problem with its primary temperature sensor and has stopped working as a safety precaution.
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.
Your boiler has detected a problem with its primary temperature sensor and has stopped working as a safety precaution.
Parts commonly replaced
- Flow temperature sensor (S1)
- Sensor wiring harness
Related codes
15
Return sensor error
16
Internal error
17
Internal error
18
Internal error
Showing 21–30 of 44
19
Internal error
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.
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.
Parts commonly replaced
- NTC Temperature Sensor (S2)
- Sensor wiring harness
- External sensor
20, 21, 22, 23, 24
Sensor fault S2
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.
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.
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.
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.
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.
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.
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.
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.
Parts commonly replaced
- Flow NTC sensor
- Return NTC sensor
- Circulation pump
25
Parameter error
26
Parameter error
27
Internal error
Showing 31–40 of 44
28
Internal error
29 Your boiler has detected a failure in an internal safety switch that controls the gas supply, meaning it cannot safely ignite.
Your boiler has detected a failure in an internal safety switch that controls the gas supply, meaning it cannot safely ignite.
Parts commonly replaced
- Printed Circuit Board (PCB)
- Gas valve wiring loom
Related codes
29,30
Gas valve relay faulty
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.
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.
Parts commonly replaced
- Main control board (PCB)
- Wiring harness
Related codes
31
Internal error
32
Internal error
33
Internal error
34
Internal error
35
Internal error
36
Internal error
Showing 41–44 of 44
37
Internal error
38
Internal error
39
Internal error
40
Internal error