Main Eco Elite System Fault codes & diagnostics

9 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

System Natural Gas 24-28 kW 2012 onwards Discontinued
GC Numbers 41-467-2841-467-2941-467-2141-467-22
Download the Main Eco Elite System manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

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Severity at a glance

Each cell = one fault code. Hover to identify.
8 High 1 Medium

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
41-467-28 Eco Elite 24 System ErP 2012–present
41-467-29 Eco Elite 28 System ErP 2012–present
41-467-21 System Eco Elite 24 2012–2015
41-467-22 System Eco Elite 28 2012–2015

All 9 documented codes

Tap any card for details

E20

Your boiler has lost the ability to accurately measure the temperature of the water circulating through your radiators, so it has shut down to prevent overheating.

High Engineer only £120-220

Parts commonly replaced

  • Central Heating NTC Sensor
  • Wiring harness

Related codes

E28

Your boiler has detected that the internal computer board installed does not match the model requirements, preventing it from functioning correctly.

High Engineer only £250-400

Parts commonly replaced

  • Printed Circuit Board (PCB)
E50

Your boiler has lost the ability to accurately measure the temperature of its hot water, so it has shut down to prevent overheating.

High Engineer only £120-220

Parts commonly replaced

  • Hot water temperature sensor (NTC thermistor)
  • Wiring harness

Related codes

E110

Your boiler has detected that it is running too hot and has automatically shut itself down to prevent damage.

High Engineer only £120-250

Parts commonly replaced

  • Safety thermostat
  • Pump
  • Diverter valve
  • PCB

Related codes

E119

Your boiler has stopped working because the water pressure inside the heating system has dropped too low to operate safely.

High DIY-safe

What to check first

  1. Locate the filling loop (usually a silver braided hose under the boiler)
  2. Open the valves to allow mains water into the system until the pressure gauge reads between 1.0 and 1.5 bar
  3. Close the valves tightly and restart the boiler

Parts commonly replaced

  • Pressure relief valve
  • Pressure sensor
  • Expansion vessel
E125

Your boiler is struggling to pump water around your heating system, so it has safely shut down to prevent overheating.

High Engineer only £150-300

Parts commonly replaced

  • Central heating pump
  • Diverter valve
  • System filter

Related codes

E131

Your boiler has lost power while trying to recover from an earlier error, meaning it has simply switched itself off to protect itself.

Medium DIY-safe £90-180

What to check first

  1. Locate the boiler power switch or fuse spur near the unit and turn it off.
  2. Wait 60 seconds for the internal memory to clear.
  3. Turn the power back on and see if the boiler restarts automatically.

Parts commonly replaced

  • Printed Circuit Board (PCB)
  • Power supply cable

Related codes

E133

Your boiler is failing to ignite because it is not receiving enough gas or is unable to maintain a flame, causing it to stop working for safety reasons.

High Engineer only £120-250

Parts commonly replaced

  • Gas valve
  • Ignition electrode
  • Condensate trap
  • PCB

Related codes

E160

Your boiler has detected that the internal fan responsible for safely venting exhaust gases is not working correctly, so it has shut down to prevent any unsafe operation.

High Engineer only £180-350

Parts commonly replaced

  • Fan unit
  • Wiring harness
  • Printed Circuit Board (PCB)

Related codes