Sub-Zero Designer Code 10-2-11: Zone 2 coil sensor shorted

What 10-2-11 means

Code 10-2-11 on Sub-Zero Designer models like the DET3050CI tall unit and the DEC3050R column reports that the zone 2 evaporator thermistor is shorted. That sensor sits on the zone 2 coil and tells the control when frost has built up enough to start defrost and when the coil is warm enough to stop. A shorted reading gives the control false information, so defrost may happen at the wrong times. You may notice frost on the back wall or a zone that does not hold its setting.

Common causes of 10-2-11

Shorted evaporator thermistor in zone 2
Wire insulation worn through near the coil
Water entering the sensor connection

✓ One safe check you can try

1) Note the code and look for frost on the zone 2 rear panel. 2) Avoid placing warm food in that zone for now. 3) Keep the door closed. 4) Cycle the breaker off and on one time. 5) Book service so the sensor can be tested.

! Why to stop there

The coil sensor is reachable only after removing the rear cover.
Measuring a short requires checking resistance against temperature.
Damaged wiring near the coil must be sealed properly.

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.

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Other Refrigerator codes

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10-2-1110-2-11 questions

How does 10-2-11 differ from 10-2-10?

Both concern the zone 2 evaporator thermistor on Designer units. Code 10-2-10 means it reads open, while 10-2-11 means it reads shorted. The tests and repair are similar.

Why is frost building in zone 2?

With a false coil reading, the control may skip or cut short a defrost cycle. Frost then thickens on the coil and slowly restricts airflow into the zone.

What is the repair?

We confirm the short, then replace the sensor or fix the wiring. Our workmanship is covered for 30 days, and you approve the written price first.