Source guide
Sub-Zero Refrigerator error-code sources
This page shows how the current Sub-Zero refrigerator records are sourced, when they were verified, and where users can inspect the original manufacturer guidance.
Records covered6
Source URLs7
Source typeofficial
Last verified2026-10-26
Market scopeUnited States
Covered records
Sub-Zero Refrigerator 05: Sub-Zero documents 05 on 600 Series refrigeration as a refrigerator-cabinet thermistor reading that is open, shorted, or repeatedly erratic.Sub-Zero Refrigerator 06: Sub-Zero documents 06 on 600 Series refrigeration as a refrigerator-evaporator thermistor signal that is open, shorted, or inconsistent.Sub-Zero Refrigerator 07: Sub-Zero documents 07 on 600 Series refrigeration as a freezer-cabinet thermistor reading that is open, shorted, or repeatedly erratic.Sub-Zero Refrigerator 20: Sub-Zero documents 20 on 600 Series refrigeration as a freezer-defrost underheat condition with missing feedback at defrost start.Sub-Zero Refrigerator 21: Sub-Zero documents 21 on 600 Series refrigeration as a defrost-overheat warning whose owner path depends on actual compartment temperature.Sub-Zero Refrigerator 24: Sub-Zero documents 24 on 600 Series refrigeration as a defrost-underheat warning with an owner response only near normal temperatures.
Source hosts
- subzero-wolf.com
Source links are kept visible on each record page. FaultCodeLab uses short summaries and does not copy manuals or support pages verbatim.
Source URLs
https://www.subzero-wolf.com/assistance/answers/sub-zero/600-series/600-series-error-code-05Cited by reviewed records: 05.Latest record verification: 2026-10-26.AI-assisted read of the official Sub-Zero source. Read the individual 600 Series 05 article, its refrigerator cabinet thermistor distinction, 10-second/erratic-reading criteria and direct Factory Certified Service boundary. Preserved no owner reset, independent temperature/food protection and no internal access; removed speculative circuit/control replacement labels. No technician, hands-on or native-language approval. General food-temperature precautions were separately checked against the FoodSafety.gov chart linked by the existing refrigerator safety checklist; they are not manufacturer component-diagnosis advice.Verified the official 600 Series 05/EC05 thermistor description, ten-second or erratic-reading context, and direct Factory Certified Service boundary.https://www.subzero-wolf.com/assistance/answers/sub-zero/600-series/600-series-error-code-06Cited by reviewed records: 06.Latest record verification: 2026-10-26.AI-assisted read of the official Sub-Zero source. Read the individual 600 Series 06 article, its refrigerator evaporator thermistor distinction, 10-second/erratic-reading criteria and direct Factory Certified Service boundary. Preserved no owner reset, independent temperature/food protection and no internal access; removed speculative circuit/control replacement labels. No technician, hands-on or native-language approval. General food-temperature precautions were separately checked against the FoodSafety.gov chart linked by the existing refrigerator safety checklist; they are not manufacturer component-diagnosis advice.Verified the 600 Series 06 evaporator-thermistor wording, EC06/EC 06 aliases, and manufacturer instruction to use qualified service.https://www.subzero-wolf.com/assistance/answers/sub-zero/600-series/600-series-error-code-07Cited by reviewed records: 07.Latest record verification: 2026-10-26.AI-assisted read of the official Sub-Zero source. Read the individual 600 Series 07 article, its freezer cabinet thermistor distinction, 10-second/erratic-reading criteria and direct Factory Certified Service boundary. Preserved no owner reset, independent temperature/food protection and no internal access; removed speculative circuit/control replacement labels. No technician, hands-on or native-language approval. General food-temperature precautions were separately checked against the FoodSafety.gov chart linked by the existing refrigerator safety checklist; they are not manufacturer component-diagnosis advice.Verified the official 07 freezer-cabinet thermistor description, EC aliases, explicit absence of customer troubleshooting, and service boundary.https://www.subzero-wolf.com/assistance/answers/sub-zero/600-series/600-series-error-code-20Cited by reviewed records: 20.Latest record verification: 2026-10-26.AI-assisted read of the official Sub-Zero source. Read the 600 Series 20 defrost-underheat, feedback and terminator context plus explicit no-customer-troubleshooting boundary. Kept the wire-color detail as service context only, no reset/live test or improvised defrost; removed speculative control/circuit replacement labels. No technician, hands-on or native-language approval. General food-temperature precautions were separately checked against the FoodSafety.gov chart linked by the existing refrigerator safety checklist; they are not manufacturer component-diagnosis advice.Verified the 600 Series code 20 defrost-underheat and missing-feedback description, EC aliases, no-customer-troubleshooting statement, and service direction.https://www.subzero-wolf.com/assistance/answers/sub-zero/600-series/600-series-error-code-21Cited by reviewed records: 21.Latest record verification: 2026-10-26.AI-assisted read of the official Sub-Zero source. Read the individual 21 article and its high-temperature service versus near-normal care/clear branches. Preserved the 15-second alarm-key clear and pre-1810000 keyless OFF/ON distinction, rather than transferring it to 24. Read the linked 600 Series condenser instructions and protected-screen boundary. Removed unestablished replacement-system labels. No technician, hands-on or native-language approval. General food-temperature precautions were separately checked against the FoodSafety.gov chart linked by the existing refrigerator safety checklist; they are not manufacturer component-diagnosis advice.Verified the defrost-overheat label, high-versus-near-normal temperature split, 15-second alarm-key clear, pre-1810000 alternative, and recurrence service boundary.https://www.subzero-wolf.com/assistance/answers/sub-zero/600-series/600-series-error-code-24Cited by reviewed records: 24.Latest record verification: 2026-10-26.AI-assisted read of the official Sub-Zero source. Read the individual 24 defrost-underheat article and temperature-gated condenser-care/15-second alarm-key clear. Preserved direct service for high/rising temperatures or recurrence; did not import code 21's keyless serial-dependent alternative. Read the 600 Series condenser guide and removed unestablished replacement-system labels. No technician, hands-on or native-language approval. General food-temperature precautions were separately checked against the FoodSafety.gov chart linked by the existing refrigerator safety checklist; they are not manufacturer component-diagnosis advice.Verified the defrost-underheat label, high-versus-near-normal temperature boundary, one 15-second door-ajar-alarm clear, and recurrence service direction.https://www.subzero-wolf.com/assistance/answers/sub-zero/common/600-500-200300-series-and-model-430-condenser-cleaningCited by reviewed records: 21, 24.Latest record verification: 2026-10-26.AI-assisted read of the linked 600 Series condenser guide: control-off instruction, exact-model grille access, no chemical cleaner, and protective screen that must not be removed. This care reference does not replace the code-specific temperature, serial or service conditions.AI-assisted read of the linked 600 Series condenser guide: control-off instruction, exact-model grille access, no chemical cleaner, and protective screen that must not be removed. This care reference does not replace the code-specific temperature, serial or service conditions.
Source review log
2026-10-26 - verifiedAI-assisted read of the linked 600 Series condenser guide: control-off instruction, exact-model grille access, no chemical cleaner, and protective screen that must not be removed. This care reference does not replace the code-specific temperature, serial or service conditions.2026-10-26 - verifiedAI-assisted read of the linked 600 Series condenser guide: control-off instruction, exact-model grille access, no chemical cleaner, and protective screen that must not be removed. This care reference does not replace the code-specific temperature, serial or service conditions.2026-10-26 - verifiedAI-assisted read of the official Sub-Zero source. Read the 600 Series 20 defrost-underheat, feedback and terminator context plus explicit no-customer-troubleshooting boundary. Kept the wire-color detail as service context only, no reset/live test or improvised defrost; removed speculative control/circuit replacement labels. No technician, hands-on or native-language approval. General food-temperature precautions were separately checked against the FoodSafety.gov chart linked by the existing refrigerator safety checklist; they are not manufacturer component-diagnosis advice.2026-10-26 - verifiedAI-assisted read of the official Sub-Zero source. Read the individual 21 article and its high-temperature service versus near-normal care/clear branches. Preserved the 15-second alarm-key clear and pre-1810000 keyless OFF/ON distinction, rather than transferring it to 24. Read the linked 600 Series condenser instructions and protected-screen boundary. Removed unestablished replacement-system labels. No technician, hands-on or native-language approval. General food-temperature precautions were separately checked against the FoodSafety.gov chart linked by the existing refrigerator safety checklist; they are not manufacturer component-diagnosis advice.2026-10-26 - verifiedAI-assisted read of the official Sub-Zero source. Read the individual 24 defrost-underheat article and temperature-gated condenser-care/15-second alarm-key clear. Preserved direct service for high/rising temperatures or recurrence; did not import code 21's keyless serial-dependent alternative. Read the 600 Series condenser guide and removed unestablished replacement-system labels. No technician, hands-on or native-language approval. General food-temperature precautions were separately checked against the FoodSafety.gov chart linked by the existing refrigerator safety checklist; they are not manufacturer component-diagnosis advice.2026-10-26 - verifiedAI-assisted read of the official Sub-Zero source. Read the individual 600 Series 05 article, its refrigerator cabinet thermistor distinction, 10-second/erratic-reading criteria and direct Factory Certified Service boundary. Preserved no owner reset, independent temperature/food protection and no internal access; removed speculative circuit/control replacement labels. No technician, hands-on or native-language approval. General food-temperature precautions were separately checked against the FoodSafety.gov chart linked by the existing refrigerator safety checklist; they are not manufacturer component-diagnosis advice.2026-10-26 - verifiedAI-assisted read of the official Sub-Zero source. Read the individual 600 Series 06 article, its refrigerator evaporator thermistor distinction, 10-second/erratic-reading criteria and direct Factory Certified Service boundary. Preserved no owner reset, independent temperature/food protection and no internal access; removed speculative circuit/control replacement labels. No technician, hands-on or native-language approval. General food-temperature precautions were separately checked against the FoodSafety.gov chart linked by the existing refrigerator safety checklist; they are not manufacturer component-diagnosis advice.2026-10-26 - verifiedAI-assisted read of the official Sub-Zero source. Read the individual 600 Series 07 article, its freezer cabinet thermistor distinction, 10-second/erratic-reading criteria and direct Factory Certified Service boundary. Preserved no owner reset, independent temperature/food protection and no internal access; removed speculative circuit/control replacement labels. No technician, hands-on or native-language approval. General food-temperature precautions were separately checked against the FoodSafety.gov chart linked by the existing refrigerator safety checklist; they are not manufacturer component-diagnosis advice.
Coverage gaps
- Exact model-family pages remain gated until an official or manual-backed source supports the model-specific wording.
- Parts and service handoffs are not shown as recommendations until the source context is strong enough.
How this guide should be used
- Use the source links to verify the original manufacturer context.
- Check model notes before treating a display code as universal.
- Prefer safe first checks before any disassembly or parts decision.
Current limitations
- Manufacturer guidance can differ by model family and region.
- Alias/display variants are only added when the source supports them.
- Manual-backed model detail is planned but not bulk-generated.