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 URLs6
Source typeofficial
Last verified2026-07-30
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: 2026-07-30.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: 2026-07-30.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: 2026-07-30.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: 2026-07-30.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: 2026-07-30.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: 2026-07-30.Verified the defrost-underheat label, high-versus-near-normal temperature boundary, one 15-second door-ajar-alarm clear, and recurrence service direction.
Source review log
2026-07-30 - verifiedVerified the 600 Series 06 evaporator-thermistor wording, EC06/EC 06 aliases, and manufacturer instruction to use qualified service.2026-07-30 - verifiedVerified the 600 Series code 20 defrost-underheat and missing-feedback description, EC aliases, no-customer-troubleshooting statement, and service direction.2026-07-30 - verifiedVerified the defrost-overheat label, high-versus-near-normal temperature split, 15-second alarm-key clear, pre-1810000 alternative, and recurrence service boundary.2026-07-30 - verifiedVerified the defrost-underheat label, high-versus-near-normal temperature boundary, one 15-second door-ajar-alarm clear, and recurrence service direction.2026-07-30 - verifiedVerified the official 07 freezer-cabinet thermistor description, EC aliases, explicit absence of customer troubleshooting, and service boundary.2026-07-30 - verifiedVerified the official 600 Series 05/EC05 thermistor description, ten-second or erratic-reading context, and direct Factory Certified Service boundary.
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.