Bertazzoni Wine Refrigeration / Wine Cellars UPPER OR LOWER ZONE TOO COLD Error: Wine zone below set point
What Does Upper or lower zone too cold Mean? The Upper zone too cold or Lower zone too cold alarm appears on Bertazzoni dual-zone wine columns when either temperature zone drops below the lower boundary of its programmed range. Both conditions are covered here as they share the same causes and diagnostic approach. While this […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Maybe. The wine column can continue running but move any sparkling wines or delicate whites from the affected zone to room-temperature storage in the short term. Schedule service within a few days if the alarm recurs after the set-point is verified and a power-cycle performed.
Can I reset the code?
Yes. The alarm clears automatically when the zone temperature rises back within the programmed range. Correcting the set point or power-cycling accelerates recovery.
When to stop immediately?
Stop if you notice: Zone temperature drops below 38 °F (3 °C) despite raising the set point to its maximum, Condensation or frost is visible on the wine column exterior — indicating freezing temperatures inside.
Symptoms You May Notice
Sparkling wine and white bottles in the affected zone feel unusually cold or have frost on the exterior
Bottles stored in the over-cooled zone feel colder than their usual serving temperature and may develop condensation or a light frost on the glass exterior — a clear sign the zone temperature has dropped below the set-point minimum.
Zone temperature displayed on the control panel reads below the set point
The control panel shows a zone temperature that is lower than the programmed value, confirming the over-cooling is measurable and not just a perceptual impression. The gap between the displayed value and the set point gives an indication of severity.
Audible alarm activates with the zone alarm indicator lit on the display
The control board triggers the buzzer and may highlight the affected zone. Pressing Alarm silences the buzzer but the zone continues to be over-cooled until the fault is resolved.
Possible Causes
Zone temperature probe shorted, reporting falsely high temperature
A shorted NTC thermistor sends a near-zero resistance reading to the control board, which interprets this as a high temperature and commands continuous cooling — driving the zone well below the set-point minimum.
Requires ProfessionalControl board cooling relay stuck closed
A relay on the main control board that controls cooling for the affected zone has stuck in the closed position, keeping the compressor or fan running indefinitely regardless of the zone temperature reading.
Requires ProfessionalTemperature set point accidentally lowered to minimum value
A panel touch or child-lock disengagement may have set the zone temperature to the minimum allowable value (41 °F / 5 °C), causing aggressive and sustained cooling of that zone.
DIY PossibleSafe Checks You Can Do
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1
Verify the zone set point on the control panel
Navigate to the zone temperature settings and confirm the affected zone set point is within the normal wine storage range (upper zone typically 55–65 °F / 13–18 °C; lower zone 45–55 °F / 7–13 °C). Raise the set point if it has been accidentally lowered, then allow 30 minutes for the zone to stabilise.
On Bertazzoni dual-zone wine columns each zone is set independently. A long press on the zone button cycles through temperature in 1-degree increments.
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2
Power-cycle the unit
Switch the circuit breaker off for 2 minutes, then restore power. Allow 30 minutes with the door closed and confirm the zone temperature is rising back toward the set point. A non-returning alarm after a power-cycle with a confirmed correct set point may indicate a transient fault.
If the alarm returns within a few hours of a power-cycle with the set point confirmed correct, the fault is electronic and requires service.
When to Call a Professional
Contact a qualified technician if:
- Alarm recurs within hours after a confirmed correct set point and power-cycle — shorted thermistor or stuck relay suspected
- Zone temperature continues to drop even when the set point is raised to the maximum allowed value
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