Chaffoteaux Short Cycling

Water heater frequently shuts down and restarts while using hot water, without showing an error code.

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

Oversized heater for demand, Restricted water flow, Incorrect minimum power setting, Faulty temperature sensor

Safety: Ensure outlet temperature is not excessively high during cycling.

Increase flow rate: Open the hot tap more fully to increase demand and reduce cycling.
Descale heat exchanger: Improve heat transfer and reduce rapid temperature rise.
Check NTC sensors: Replace any sensor giving unstable readings.
Professional adjustment: A technician can adjust minimum burner power and verify correct sizing and setup.

Medium 3/5

DHW NTC Temperature Sensor

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