Beretta Temperature Sensing / Calibration Error

Water heater shows correct temperature but water at taps is much cooler or hotter

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

DHW NTC sensor out of calibration, Poor sensor contact with pipe, Mixing valve or thermostatic tap altering temperature, Incorrect parameter settings

Safety: Risk of scalding if water is hotter than indicated. Test carefully.

1. Measure actual temperature: Use a thermometer at a hot tap to compare with the heater's display.
2. Check sensor mounting: Ensure the DHW NTC is firmly attached to the outlet pipe or properly inserted into its pocket with thermal paste if specified.
3. Bypass mixers: Test at a simple tap to rule out thermostatic mixers altering temperature.
4. Replace NTC sensor (technician): If readings are consistently offset, replace the DHW NTC sensor and verify calibration.

Medium 3/5

DHW NTC sensor

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