BoilerFaultCodes 000
False flame
Ideal Systemiser Fault codes & diagnostics
32 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Gas Discontinued
GC Number 41-349-70
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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. 32 Unrated
Just want the most common Ideal Systemiser faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes
All 32 documented codes
Tap any card for details
001
Short circuit 24V
003
No flame detection - internal failure - electronic
004
Controller - Non-volatile lockout
005
Controller - internal failure - electronic
006
Controller - internal failure - electronic
007
Controller - internal failure - electronic
008
Pressure differential switch failure (not applicable)
010
Controller - internal failure - electronic
011
Controller - internal failure - electronic
Showing 11–20 of 32
013
Controller - internal failure - electronic
014
Controller - internal failure - electronic
015
Controller - internal failure - electronic
016
Controller - internal failure - electronic
017
Controller - internal failure - electronic
024
Flow and return sensors NTC 1 and NTC 2 reversed
026
Minimum gas pressure
028
Air flow - Fan not running / no tacho signal
029
Air flow - Fan keeps turning / no tacho signal
030
Maximum difference between T1 and T2 exceeded
Showing 21–30 of 32
031
NTC 1 short circuit
032
NTC 2 short circuit
036
NTC 1 open
037
NTC 2 open
041
Controller - internal failure - electronic
042
Controller - internal failure - electronic
060
Controller - internal failure - electronic
912
Water pressure switch or flue thermostat failure
918
Maximum temperature - Flow temperature T1 too high
919
Maximum temperature - Return temperature T2 too high
Showing 31–32 of 32
925
Maximum temperature - Flow temperature T1 increase too fast
FAULT
The display flashes continuously, indicating ignition failure after 5 attempts