Sub-Zero Designer Code 10-3-11: Zone 3 evaporator sensor short

What 10-3-11 means

Sub-Zero Designer units such as the DEC3050R and DET3050CI display 10-3-11 when the zone 3 evaporator thermistor reads shorted. Current Classic CL models use the same code for an evaporator thermistor short, while older Classic BI units like the BI-36U/S and BI-48SD/S list it as the condenser sensor shorted. With a shorted coil reading, defrost may start and stop at the wrong times. Owners may notice frost on the rear panel, water in the cabinet after defrost, or temperatures that drift.

Common causes of 10-3-11

Shorted evaporator thermistor
Insulation worn through on the sensor lead near the coil
Moisture in the sensor connection

✓ One safe check you can try

1) Find your model number on the tag inside the door. 2) Inspect the rear panel of the affected zone for frost. 3) Wipe up any water left on shelves or the floor of the cabinet after defrost. 4) Restart power once at the breaker. 5) Call us if 10-3-11 persists or temperatures drift.

! Why to stop there

Evaporator sensors are behind the coil cover.
Shorted readings need verification with a meter.
Wiring near the coil must stay sealed.

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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10-3-1110-3-11 questions

Does 10-3-11 mean the same thing on every Sub-Zero?

Not quite. Designer units read it as the zone 3 evaporator thermistor shorted, Classic CL as an evaporator thermistor short, and Classic BI as the condenser sensor shorted.

Why might I see water after defrost?

A false coil reading can make defrost start or stop at the wrong moment, leaving extra meltwater in the cabinet. Correcting the sensor usually brings defrost back to normal.

What does the repair involve?

We confirm the short, replace the thermistor or repair its wiring, and watch a defrost cycle. The price is agreed in writing before work begins, and our labor carries a 30-day warranty.