Riello Poor Combustion / Incorrect Air-Fuel Mix

Burner ignites but flame is very yellow and unstable

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

Insufficient combustion air, Dirty nozzle, Incorrect head or air band setting, Low pump pressure

Safety: Turn off power and fuel before adjustments.

Steps:

Clean nozzle and head: Replace nozzle and clean the Riello head and blast tube.
Check air intake: Ensure intake is clear and room has adequate combustion air.
Have pump pressure and air settings adjusted: A technician should set pump pressure and air band using combustion instruments.

Professional Required 5/5

Combustion Head Assembly

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