BoilerFaultCodes 20
Central Heating NTC Fault
Baxi Ecoblue 28 System ErP Fault codes & diagnostics
16 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
System Gas 2015-present
GC Number 41-470-27
Download the Baxi Ecoblue 28 System ErP manual
PDF
Versions & GC numbers
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
Which version do you have?
The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.
| GC number | Appliance (register name) | Produced |
|---|---|---|
| 41-470-27 | Ecoblue 28 System ErP | 2015–present |
Appliance names and production years are taken from the UK Product Characteristics Database (the SAP/SEDBUK register). Where a GC number is also printed in this model's own manufacturer manual, both sources were checked to agree.
Just want the most common Baxi Ecoblue 28 System ErP 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
28
Flue NTC Fault
40
Central Heating Return NTC Fault
109
Possible Circulation Fault
110
Safety Thermostat Operated (pump fault)
111
Safety Thermostat Operated (over temperature)
117
Primary System Water Pressure Too High
118
Primary System Water Pressure Too Low
125
Circulation Fault (Primary)
128
Flame Failure (no lock-out)
130
Flue NTC Operated
133
Flame Failure
151
Flame Failure
160
Fan or Fan Wiring Fault
384
False Flame
E118
low water pressure
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