Thermo Pride Combustion Instability

Furnace ignites but makes a roaring or rumbling 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 gas pressure, Blocked or restricted combustion air intake on Thermo Pride furnace, Dirty burners, Heat exchanger restriction

Safety First: Turn off gas and power if the noise is severe or accompanied by soot or flame rollout.

Check combustion air: Ensure intake pipes (on sealed combustion models) are not blocked by snow, leaves, or debris.
Inspect burners: Have burners cleaned and inspected for proper alignment.
Professional combustion test: A technician should measure gas pressure and perform a combustion analysis to correct the issue.

Professional Required 5/5

Burner Assembly

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