Vokera Combustion or Airflow Resonance

Furnace produces a whistling or high-pitched noise 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

Partially blocked gas injector, Flue restriction, Fan speed issues, Incorrect gas/air ratio

Safety: If you smell gas or suspect unsafe operation, turn off the furnace and gas supply and call a professional immediately.

Check flue terminal: Ensure the external flue terminal is not partially blocked by debris or ice.
Note operating conditions: Observe whether the noise occurs at high or low fire, or only in windy conditions. This information helps diagnosis.
Professional service: A technician should inspect the burner, fan, and flue, and perform a combustion analysis.

Hard 4/5

Fan and Burner Assembly

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