SmartPool Kettling / boiling in heat exchanger

Heater makes loud banging or popping noises 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

Heavy scale buildup inside SmartPool copper or cupronickel tubes, Low water flow through heater, Air pockets trapped in heat exchanger

Warning: Severe kettling can damage the heat exchanger. Do not ignore loud banging.

Improve flow: Clean the filter, open all valves fully, and increase pump speed to ensure strong flow through the heater.
Bleed air: If your SmartPool heater has an air bleed valve on the header, open it slightly with the pump running to release trapped air until water flows steadily.
Descaling: Long-term kettling usually requires professional chemical descaling of the SmartPool heat exchanger. Schedule service if noise persists.

Hard 4/5

SmartPool Heat Exchanger

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