Myson Boiler Fault Codes

28 fault codes across 5 Myson boiler models — explained in plain English.

28 fault codes
5 models documented
0 currently sold
5 legacy models
Just want the most common Myson problems?
The top 8 faults across the whole Myson range — causes, DIY checks, repair costs.
Most serious

High-severity Myson fault codes

LED 2
Your boiler is struggling to clear air through its internal system effectively enough to safely ignite the burner.
Midas 100
 204
Your boiler's electronic control system is experiencing an internal error that is preventing it from functioning, effectively locking the system for safety.
Midas 100
 LED 2
Your boiler is struggling to clear air through its internal system effectively enough to safely ignite the burner.
System 50
 LED 2
Your boiler is struggling to clear air through its internal system effectively enough to safely ignite the burner.
System 80
 10.1
Your boiler is unable to start the small flame needed to fire up the main heating system, which means you have no heating or hot water.
Economist WM Series
All models

5 Myson boiler models

Midas 100
Regular Discontinued
7 fault codes
System 50
System Discontinued
6 fault codes
System 80
System Discontinued
6 fault codes
Economist WM Series
Regular Discontinued
4 fault codes · 1990-1996
Wallflame WF IV
Regular Discontinued
5 fault codes · 1970s-1980s
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