BoilerFaultCodes 5 Boiler Resets in 15 minutes
5 Boiler Resets in 15 minutes
Ideal Logic Combi ES35 Fault codes & diagnostics
16 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Combi Natural Gas 2013-2016 Discontinued
GC Number 47-349-03
Download the Ideal Logic Combi ES35 manual
PDF
Other editions of this manual (the one above is UIN 208383 A02):
UIN 208383 A01 (PDF)
Manufacturers revise a model over the years. If your boiler is older than the manual above, an
earlier edition may match it better.
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. 16 Unrated
Just want the most common Ideal Logic Combi ES35 faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes
All 16 documented codes
Tap any card for details
BCC Activation Fault
BCC Activation Fault
BCC Fault
BCC Fault
c0
RESET BOILER
c2
BCC FAULT (BOILER CHIP CARD)
False Flame Lockout
False Flame Lockout
Fan Fault
Fan Fault
Flame Loss
Flame Loss
Flow Thermistor
Flow Thermistor
L1
FLOW TEMPERATURE OVERHEAT LOCKOUT
L2
IGNITION LOCKOUT
Low Mains Voltage
Low Mains Voltage
Low Water Pressure
Low Water Pressure
Outside Sensor Failure
Outside Sensor Failure
Return Thermistor
Return Thermistor
Unconfigured PCB
Unconfigured PCB