Heater cycles on and off very frequently, even with little water usage.

Safety: Disconnect power before adjusting sensors.

Steps:

• Check NTC placement: Ensure the NTC sensor is fully inserted into its well and not loose.
• Improve contact: If applicable, apply thermal paste or ensure the sensor spring clip is tight against the tank.
• Adjust hysteresis (if available): Some digital Eldom models allow adjusting differential or eco modes to reduce cycling.
• Replace thermostat: On mechanical models, if the thermostat is overly sensitive or worn, replace it.