Ruud Minor Combustion Disturbance or Dust in Ducts

Furnace runs but occasionally emits a brief puff of smoke or odor from supply registers at startup.

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

Dust in heat exchanger or ducts, Slight delayed ignition, Debris in burners

Safety: If smoke is heavy or persistent, shut off the furnace and call a technician.

Steps to check:

Filter and ducts: Replace the filter and consider duct cleaning if dust is visible at registers.
Observe burners: Have a technician inspect burner ignition and flame pattern to rule out delayed ignition.

Medium 3/5

Burner Assembly

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