Bertazzoni Wine Refrigeration / Wine Cellars UPPER OR LOWER ZONE TOO WARM Error: Wine zone above set point
What Does Upper or lower zone too warm Mean? The Upper zone too warm or Lower zone too warm alarm appears on Bertazzoni dual-zone wine columns — including Professional Series and Master Series built-in wine storage models — when either temperature zone exceeds its programmed set-point range. Both alarms are treated here together because they […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. Stop storing wine in the affected zone until the cooling fault is identified and resolved. Wine exposed to temperatures above 75 °F (24 °C) for more than a few hours can suffer irreversible quality damage.
Can I reset the code?
No. The alarm clears automatically when the zone temperature returns to within the programmed range. Pressing Alarm silences the buzzer but does not resolve the fault.
When to stop immediately?
Stop if you notice: Zone temperature exceeds 75 °F (24 °C) and does not recover after a power-cycle and door reseat, Any burning smell or unusual noise from the compressor or fan area.
Symptoms You May Notice
Bottles in the affected zone feel warmer than expected when touched
Wine stored at correct cellaring temperatures (50–65 °F / 10–18 °C) should feel distinctly cool to the touch. If bottles in either the upper or lower zone feel room-temperature or warm, the zone has been above its set point long enough to affect the wine.
Zone temperature displayed on the control panel reads above the set point
The control panel shows the current zone temperature exceeding the programmed value for that zone. The discrepancy between the displayed temperature and the set point gives a rough indication of how long the fault has been developing.
Audible alarm sounds with the affected zone alarm indicator lit
The control board triggers the buzzer and may illuminate a zone-specific alarm indicator. Pressing Alarm silences the buzzer but does not address the cooling fault.
Possible Causes
Zone NTC thermistor probe failed or disconnected
If the temperature probe for the affected zone has gone open-circuit, the control board loses feedback and either ceases cooling the zone or runs it uncontrolled. A disconnected harness connector at the probe or board end produces the same result.
Requires ProfessionalCondenser or evaporator fan motor failure
A failed fan motor reduces or eliminates cold-air delivery to the affected zone. The opposite zone may continue to cool normally, which can help identify this as the cause if only one zone is warm.
Requires ProfessionalRefrigerant charge low due to sealed-system leak
A leak in the sealed refrigerant circuit gradually reduces the charge until the compressor cannot maintain programmed temperatures in one or both zones. This fault requires EPA-certified sealed-system repair.
Requires ProfessionalDoor gasket failed or bottle blocking door seal
Continuous warm-air infiltration through a failed gasket or an obstructed door closure will cause one or both zones to drift above their set points over several hours, even with the cooling system functioning correctly.
DIY PossibleSafe Checks You Can Do
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1
Verify the door is fully sealed with no obstructing bottles
Inspect each shelf for bottles overhanging the front edge and reposition as needed. Close the door firmly and run the paper-slip test around the full gasket perimeter to confirm an even seal.
This is especially worth checking if only one zone is warm — a partially open door affects both zones, while a cooling-component fault tends to isolate to one zone.
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2
Check the set-point temperature for the affected zone
Navigate to the zone temperature settings on the control panel and confirm the set point has not been accidentally changed to a higher value. Correct if needed and allow 30 minutes for the zone to respond.
On dual-zone Bertazzoni wine columns each zone has an independent set point — upper zone is typically set 5–10 °F warmer than the lower red-wine zone on many installations.
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3
Power-cycle the unit once
Switch the circuit breaker off for 2 minutes, restore power, and allow 30 minutes with the door closed. If the zone temperature trends back toward the set point, a transient sensor glitch may have cleared.
If the temperature does not recover, move wine from the affected zone to temperature-stable secondary storage and schedule service.
When to Call a Professional
Contact a qualified technician if:
- Alarm returns within hours of a power-cycle with the door confirmed sealed and set point verified — thermistor, fan, or sealed-system fault requires professional diagnosis
- Only one zone is warm while the other cools normally — points to a zone-specific fan or thermistor fault requiring service equipment to isolate
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