Atlantic Short Cycling Due to Sensor or Thermostat Issues

Atlantic water heater cycles on and off rapidly, with unstable water temperature.

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

Loose temperature sensor, poor thermal contact, thermostat installed incorrectly, control board hysteresis misbehavior

Safety: Disconnect power before accessing sensors or thermostats.

Inspect the NTC sensor or thermostat bulb to ensure it is fully inserted into its well and firmly attached to the tank.
Apply thermal paste if recommended by Atlantic to improve contact.
Check that insulation around the sensor is intact and not allowing cold drafts to affect readings.
If the sensor is damaged or readings are erratic, replace it with the correct Atlantic part.
If short cycling persists with a new sensor, the control board may be faulty and require replacement.

Medium 3/5

NTC Temperature Sensor Probe

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