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Error code · Wine Storage

Sub-Zero BW-30/UW-24 Wine Code EC-05: upper cabinet sensor

Both the Classic BW-30 and the undercounter UW-24 and UW-24/S report EC-05, displayed as EC 05, when the upper cabinet thermistor reads open or shorted for 10 seconds or more, or keeps returning inconsistent temperatures. That…

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Code
EC-05
Appliance
Wine Storage
Brand
Sub-Zero
Warranty
30-day workmanship

What EC-05 means

Both the Classic BW-30 and the undercounter UW-24 and UW-24/S report EC-05, displayed as EC 05, when the upper cabinet thermistor reads open or shorted for 10 seconds or more, or keeps returning inconsistent temperatures. That sensor measures the air in the upper wine zone, so the control no longer knows how warm or cold that zone really is. The upper zone may drift, the display can show odd readings, and cooling cycles may become irregular.

Common causes of EC-05

  • An upper cabinet sensor connector that is loose
  • A pinched sensor wire near the door or liner
  • An upper cabinet thermistor that has failed
  • A control input that misreads the sensor
✓ One safe check you can try

1. Place a thermometer in the upper zone for an hour. 2. Compare it with the display reading. 3. Make sure the upper door closes and seals. 4. Reset the unit at the breaker after one minute off. 5. If EC 05 returns, call us.

! Why to stop there
  • The sensor and its wire run behind the liner
  • Testing needs a meter and a temperature reference
  • Replacing parts blindly can miss a wiring break
Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.
→Same appliance

Other Wine Storage codes

45-2-00Sub-Zero Designer Wine (IW) Code 45-2-00: zone 2 lights not drawing power 45-2-01Sub-Zero Designer Wine (IW) Code 45-2-01: zone 2 light short circuit 90-5-80Sub-Zero Designer Wine (IW) Code 90-5-80: keypad module not talking to the control 90-H-80Sub-Zero Designer Wine (IW) Code 90-H-80: no communication with the high-voltage micro 90-H-82Sub-Zero Designer Wine (IW) Code 90-H-82: partial communication with the CCM 90-H-83Sub-Zero Designer Wine (IW) Code 90-H-83: bad data from the high voltage micro 90-H-84Sub-Zero Designer Wine (IW) Code 90-H-84: high voltage micro failed to initialize 95-1-00Sub-Zero Designer Wine (IW) Code 95-1-00: zone 1 door open too long
EC-05EC-05 questions
Why does the display show a strange temperature with EC-05?

The upper cabinet thermistor feeds the display. When it reads open or shorted, the number shown can jump or freeze, which is often the first clue.

Is the upper cabinet sensor the same as the upper coil sensor?

No. EC 05 is the air sensor in the upper cabinet. EC 06 is the sensor on the upper evaporator coil. They are tested separately.

How soon should I book?

Within a few days. The unit keeps running, but without a good reading the upper zone may drift. Repairs are priced in writing first. Keep a thermometer in the upper zone meanwhile.

Book a visit

Still seeing EC-05?

A technician diagnoses it on site and gives you the price in writing before any work starts.

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