F16 High

Ideal F16 Fault Code

The Ideal F16 fault code means: your heat pump is unable to start the part responsible for moving heat into your home, meaning your heating and hot water will not work until this is resolved.. 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: Heat Pump compressor fault

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 F16 fault code

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

Source

Ideal F16 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