BoilerFaultCodes 5v[0
Parameter error
Main Eco 24 HE Fault codes & diagnostics
50 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Combi Natural Gas 24 kW 2012 onwards Discontinued
GC Numbers 47-467-1247-467-13
Replaced by: Main Eco Elite
Download the Main Eco 24 HE 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. 50 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 |
|---|---|---|
| 47-467-12 | Eco Elite 25 Combi ErP | 2012–present |
| 47-467-13 | Eco Elite 30 Combi ErP | 2012–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 Main Eco 24 HE faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes
All 50 documented codes
Tap any card for details
5v[1
Maximum flow temperature exceeded
5v[2
Maximum increase of the flow temperature has been exceeded
5v[7
Maximum difference between the flow and return temperature exceeded
5v[10
Shutdown input is open
5v[11
Shutdown input active or frost protection active
5v[12
Communication error with the HMI PCB
5v[13
Communication error with the SCU PCB
5v[15
Gas pressure too low
5v[16
Configuration error
Showing 11–20 of 50
5v[17
Configuration fault or default parameter table incorrect
5v[18
Configuration error (Boiler/PSU not recognised)
5v[19
Configuration fault or parameters df-dV unknown
5v[20
Configuration procedure active
5v[21
Communication fault
5v[22
No flame during operation
5v[25
Internal fault in gas/air unit
Code A
Maintenance message
Code B
Blockage Temperature protection
Code C
Shutdown input
Showing 21–30 of 50
e00
Storage unit PSU parameter not found
e01
The safety parameters are incorrect
e02
Flow temperature sensor short circuited
e03
Flow temperature sensor open circuit
e04
Flow temperature too low
e05
Flow temperature too high
e06
Return temperature sensor short circuited
e07
Return temperature sensor open circuit
e08
Return temperature too low
e09
Return temperature too high
Showing 31–40 of 50
e10
Difference between the flow and return temperatures too great
e11
Difference between the flow and return temperatures too great
e12
Temperature of heat exchanger above normal range (high-limit thermostat STB)
e14
5 burner start-up failures
e16
False flame signal
e17
Problem on the gas valve
e34
Fan fault
e35
Flow and return reversed
e36
Ignition fault
e37
Communication fault
Showing 41–50 of 50
e38
Communication error with the SCU PCB
e39
Shutdown input in locked-out mode
e40
HRU/URC unit test error
e41
Maximum control unit temperature exceeded
Error code 1
Sensor fault, temperature fault or flow fault
Error code 2
Maximum temperature of heat exchanger or control unit exceeded
Error code 3
Ignition fault: 5 burner start-up failures
Error code 4
Fan fault
Error code 5
Parameter error
Error code 6
Miscellaneous