E83-086 High

Ideal E83-086 Fault Code

Also written as E83086 — same fault.

The Ideal E83-086 fault code means: your boiler is struggling to switch between heating your radiators and heating your hot water taps, which may cause one or both to stop working correctly.. It appears on 6 Ideal models 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: Three way diverter valve (electric actuator)
Typical repair cost £180-350 (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 E83-086 fault code

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

Source

Ideal E83-086 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