BoilerFaultCodes
Myson Boiler Fault Codes
16 fault codes across 3 Myson boiler models — explained in plain English.
Myson fault codes on this site
We document 16 fault codes across 3 Myson models, covering 16 distinct codes. Myson boilers use light sequences and status descriptions rather than numbered codes. Codes for 2 of these models are taken directly from the manufacturer's own service or installation manual. Myson is a smaller name in the UK market, and if you own one this is likely one of the few places its fault codes are collected in one place.
Models covered: Midas 100, Economist WM Series, Wallflame WF IV.
Just want the most common Myson problems?
The top 8 faults across the whole Myson range — causes, DIY checks, repair costs.
High-severity Myson fault codes
LED 2 204 10.1 10.2 10.3
Your boiler is struggling to clear air through its internal system effectively enough to safely ignite the burner.
Midas 100
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
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
Your boiler's pilot light is failing to stay on, which prevents the main burner from firing and heating your home.
Economist WM Series
Your boiler has a flame for the pilot light, but the main heating burner is failing to ignite, meaning you won't have any heating or hot water.
Economist WM Series
All models
3 Myson boiler models
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