Sub-Zero Designer Code 10-C-00: condenser sensor circuit is open

What 10-C-00 means

Sub-Zero Designer models in the DET/DEC family, like the DET3050CI, report 10-C-00 when the condenser thermistor reads open. That sensor watches the temperature at the condenser, where heat from the cabinets is released into the room, and the board uses it to monitor how the refrigeration system is running. With the circuit open, the board loses that reading. You see 10 C 00 on the display, and cooling may continue but without the board's normal oversight.

Common causes of 10-C-00

A disconnected plug at the condenser thermistor
A wire broken in the machine compartment
An open condenser thermistor

✓ One safe check you can try

1. Check that the grille is not blocked and vacuum any lint you can reach from the front. 2. Make sure the kitchen area in front of the unit stays clear. 3. Turn the breaker off for one minute, then restore power. 4. Check cabinet temperatures; call us if 10-C-00 stays.

! Why to stop there

The condenser sensor lives in the machine compartment with the compressor
That area holds hot surfaces, a fan and line voltage
Rerouting a wire wrongly can damage it again on the hot tubing

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

80Sub-Zero 700TF Code 80: No inverter feedback after a board change ddSub-Zero 600 and 700 Series Display dd: Diagnostics switched off deSub-Zero 600 and 700 Series Display de: Diagnostics enabled 23Sub-Zero 600, 700 and 648PRO Code 23: Defrost overheat with no feedback 50Sub-Zero 600 and 700 Series Code 50: Refrigerator compressor running too long 41Sub-Zero 648PRO Code 41: Zone compressor or wiring problem 81Sub-Zero 700-2 Code 81: Variable-Speed compressor fails to start 82Sub-Zero 700-2 Code 82: VS compressor controller needs replacement

10-C-0010-C-00 questions

Where is the condenser thermistor?

It is in the machine compartment, near the condenser coil that releases heat. We reach it from the grille side and check the plug and wire before testing the sensor.

Will my Designer refrigerator keep cooling?

Often it does, at least for a while. The condenser reading helps the board keep watch over the system, so we suggest booking a visit soon rather than waiting.

Can dust on the condenser cause 10-C-00?

Dust alone does not open the circuit. It is still worth vacuuming the grille, and we clean the condenser during the visit while we repair the sensor connection.