Sub-Zero CL, Designer and Legacy Designer Code 10-1-11: short in the Zone 1 evaporator thermistor

What 10-1-11 means

Three Sub-Zero platforms share 10-1-11: the current Classic CL series such as the CL3650U, current Designer units like the DET3050CI, and Legacy Designer integrated models like the IT-36CI. On all three it reports a short in the Zone 1 evaporator thermistor, the sensor on the cooling coil. With a shorted reading the board cannot judge when defrost should end, so frost may linger on the coil and Zone 1 may warm up gradually.

Common causes of 10-1-11

Water from defrost reaching the sensor plug
Insulation worn through on the evaporator sensor wire
A shorted Zone 1 evaporator thermistor

✓ One safe check you can try

1. Look for water or ice on the floor of Zone 1 and dry it. 2. Clear anything blocking the rear air vents. 3. Close the door and check that it seals all around. 4. Reset the breaker once. 5. Keep a thermometer inside and book us if it rises.

! Why to stop there

The coil sensor is reached only by removing the evaporator cover
Drain or ice problems that wet the plug need correcting too
Each of the three platforms routes this wiring differently

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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10-1-1110-1-11 questions

My CL3650U and a friend's Designer both had 10-1-11. Same problem?

Yes. Classic CL, Designer and Legacy Designer all use 10-1-11 for a short in the Zone 1 evaporator thermistor. The location of the plug differs, but the reading is the same.

Why does a coil sensor matter for cooling?

It tells the board when defrost has melted the ice. A shorted reading confuses that timing, so ice can build and block airflow through Zone 1.

What do you charge to fix it?

We test first and give a written price before any work. The total depends on whether the short sits in the plug, the wire or the sensor. Our labor comes with a 30-day workmanship warranty.