Weishaupt Combustion instability

Furnace produces 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 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 done by a qualified technician with instruments.

Hard 4/5

Burner Head Assembly

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