High
1. PILOT WILL NOT LIGHT on Ideal WLX RS50 / RS60

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

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

Check spark at electrode, HT lead damage, piezo unit operation, air in pipes, gas pressure at boiler inlet, and pilot jet blockage.

From this model's manual
Verified against the Ideal/Ideal Wlx Rs50 Rs60 installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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All 2 fault codes on the WLX RS50 / RS60

Seeing a different code? Every code this model can display, in one place.

3. PILOT LIT, BUT NO MAINS GAS

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