How much does it cost to fix Ideal error code 95 H......n.....?

Typical repair cost for the Ideal 95 H......n..... fault is £80-160 including labour.

95 H......n..... High

Ideal 95 H......n..... Fault Code

Q: What does the Ideal 95 H......n..... fault code mean?

Your boiler has detected that the electrical wiring coming into the unit is connected backwards, which is preventing it from starting up for safety reasons.

Also written as 95HN — same fault.

The Ideal 95 H......n..... fault code means: your boiler has detected that the electrical wiring coming into the unit is connected backwards, which is preventing it from starting up for safety reasons.. It appears on 3 Ideal models in our database.

Technical description: PHASE REVERSAL ERROR (Check wiring to the boiler for reversed live and neutral)

What causes the Ideal 95 H......n..... fault?

This fault occurs when the electrical supply to the boiler has been wired incorrectly, causing the live and neutral connections to be swapped. It most commonly happens after electrical work has been carried out in the home or if a new power cable has been fitted to the boiler. For safety, the boiler will refuse to ignite because it cannot correctly verify that the electrical circuit is safe to operate.

Typical repair cost £80-160 (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 95 H......n..... fault code

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

Source

Ideal 95 H......n..... 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