no live supply on red lead High

Ideal no live supply on red lead Fault Code

Also written as NOLIVESUPPLYONREDLEAD — same fault.

The Ideal no live supply on red lead fault code means: your boiler has lost power to an internal safety sensor, meaning it cannot start the ignition process for your heating or hot water.. It appears on 1 Ideal model in our database.

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.

Technical description: No live supply on the red lead to pressure switch; check PC Board supply/connections.
Typical repair cost £160-350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Ideal models that show the no live supply on red lead fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ideal no live supply on red lead fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026