Float switch (if fitted) High

Ideal Float switch (if fitted) Fault Code

Also written as FLOATSWITCHIFFITTED — same fault.

The Ideal Float switch (if fitted) fault code means: your boiler has detected that a safety device designed to prevent water overflow or blockages has been triggered, causing the system to shut down.. 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: The diagnostics will indicate the nature of the fault to assist a speedy and effective repair

What causes the Ideal Float switch (if fitted) fault?

This fault occurs when water backs up within the system because it cannot drain away properly, triggering the safety float switch to cut off the boiler. The most common reasons are a blockage in the internal condensate trap, a buildup of debris in the drain pipe, or a failure of the external pump that moves wastewater away from the unit.

This fault is more common during freezing winter temperatures, as the external condensate pipe can freeze solid, causing water to back up into the boiler and trigger the switch.

Typical repair cost £75-180 (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 Float switch (if fitted) fault code

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

Source

Ideal Float switch (if fitted) 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