Weishaupt Combustion Instability

The furnace produces a rumbling or roaring 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

Incorrect air/fuel ratio, Blocked or partially blocked flue, Loose burner mounting, Worn burner head components.

Safety: Abnormal combustion noise can indicate unsafe operation. Monitor for soot or smells and shut down the unit if severe.

Steps:

Visual check: Look for signs of soot around the burner door or flue connection.
Flue inspection: Ensure the flue terminal is clear and that there are no obvious blockages.
Burner mounting: Check that the Weishaupt burner flange bolts are tight and that gaskets are intact.

Combustion tuning and burner head inspection must be performed by a qualified technician using appropriate instruments.

Hard 4/5

Burner Head Assembly

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