E14 displayed; controller indicates fan speed error or tachometer fault

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Faulty hall sensor in fan, Loose tachometer wire, Fan blades obstructed by debris, Control board PWM output fault

Safety: Disconnect power before accessing the fan.

Access the combustion fan (supply or exhaust, depending on model) and clean any ash or dust from the impeller and housing.
Check the small feedback/tachometer wires from the fan to the control board for secure connections.
Spin the fan by hand to ensure it rotates freely.
Restore power and observe if the fan starts smoothly. If E14 appears as the fan ramps up or down, the internal sensor may be defective.

Fan assemblies with integrated speed sensors are usually replaced as a complete unit.

Hard 4/5

Combustion Fan Assembly

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