Ideal WLX RS50 / RS60 Fault codes & diagnostics

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

Regular Natural Gas 14.6-17.6 kW 1983-1994 Discontinued

Replaced by: Classic NF

Choose your boiler type

The WLX RS50 / RS60 range comes in 2 types

Pick the one you have. The fault codes, GC numbers and manual differ by type.

WLX RS.50 0 codes · 1 GC number WLX RS.60 0 codes · 1 GC number
Each model has its own manual A family spans several manuals, one per model or generation. Pick your model above and its page has the manual its fault codes were read from.

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Fault codes

All 1 documented codes

Tap any card for details

1. PILOT WILL NOT LIGHT

Your boiler is unable to start its small internal flame, meaning the main heating system cannot turn on.

High Engineer only £90-180 Shared across the Ideal WLx range

Parts commonly replaced

  • Pilot Injector
  • HT Lead
  • Ignition Electrode
  • Piezo Igniter Unit
Full explanation for 1. PILOT WILL NOT LIGHT
Status & diagnostic codes

1 operating states & engineer diagnostics

Not faults — these are normal operating states. Tap to expand.

3. PILOT LIT, BUT NO MAINS GAS Status Your boiler's small pilot light is on, but the main burner is failing to ignite to provide heating or hot water.