Electrolux Control / Sensor Hysteresis Problem

Water heater cycles on and off rapidly (short cycling)

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

Thermostat differential too narrow, Poor sensor placement or contact, Oversized heater for small draw, Faulty control board logic

Safety first: Turn OFF power before adjusting or replacing sensors or thermostats.

Steps:

1. Verify sensor placement: Ensure tank or outlet sensors are properly seated and in good thermal contact.
2. Check thermostat settings: Some models allow adjustment of differential; set to manufacturer-recommended values.
3. Inspect control board: Look for obvious damage; if none, but short cycling persists, the PCB may be defective.

Professional help: Control logic issues typically require board replacement by a technician.

Hard 4/5

Tank Thermostat / Control PCB

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