Hoval Fan or pump noise

Furnace emits a high-pitched whine or humming during operation

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

Worn bearings in combustion fan, Cavitation in circulation pump, Resonance in flue system, Loose mounting screws on Hoval burner

Safety: Isolate power before touching moving parts.

Identify source: Listen carefully to determine whether the noise comes from the fan, pump, or flue.
Check mounting: Tighten screws on the burner, fan housing, and pump brackets.
Bleed pump: Remove air from the pump and system to reduce cavitation.
Service components: If noise persists, bearings in the fan or pump may be failing and require replacement.

Medium 3/5

Combustion Fan Motor

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