126 Medium

Ideal 126 Fault Code

The Ideal 126 fault code means: your boiler is having trouble communicating the correct temperature settings for your hot water, which may cause your hot water supply to behave inconsistently or stop heating up.. It appears on 1 Ideal model in our database.

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description: 7093 DHW Setpt Fault
Typical repair cost £120-250 (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 126 fault code

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

Source

Ideal 126 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 7 July 2026