Peerless Combustion Instability / Delayed Ignition

Boiler 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

Dirty burner, incorrect gas pressure, improper combustion air, misaligned igniter

Safety first: Turn off power and gas. Do not continue to operate a boiler with rumbling or delayed ignition.

Steps:

Inspect burner: Remove and clean the burner assembly per Peerless instructions. Remove soot and debris.
Check igniter position: Ensure the ignition electrode is correctly spaced from the burner surface.
Verify air openings: Make sure combustion air openings are not blocked.
Professional combustion setup: A technician must check gas pressure and adjust combustion using a combustion analyzer.

Professional Required 5/5

Burner assembly

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