BoilerFaultCodesIdeal 528 Fault Code
The Ideal 528 fault code means: your boiler has stopped working because the internal fan is not spinning correctly, meaning the system cannot safely clear away waste gases.. It appears on 2 Ideal models in our database.
Technical description: Air flow - Fan not running / no tacho signal
What causes the Ideal 528 fault?
This fault occurs when the boiler's control system detects that the fan is not spinning at the required speed to safely vent exhaust gases. The most common reasons are a complete mechanical failure of the fan motor, a loose connection in the wiring, or a fault on the main circuit board that prevents it from sending power to the fan.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Ideal models that show the 528 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 528 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