High
3 PILOT LIT, BUT NO MAINS GAS on Ideal Classic RS

Your boiler's small pilot flame is lit, but the main burner is failing to ignite to provide heat or hot water.

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 supply voltage; If no supply check the fuse in the plug or other supply point; Is there a supply voltage at the input to the control box; Set any CH and HW controls to CONTINUOUS position; Check the settings of the room and cylinder thermostats; If no supply - check the controls; Check the boiler thermostats; Replace the gas control valve.

From this model's manual
This code was read directly from the manufacturer service manual for this model.
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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