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Sub-Zero Microwave Error Codes

Complete fault code reference for Sub-Zero microwaves. Each code includes probable causes and verified diagnostic steps based on manufacturer service documentation.

πŸ“‹ 2 Fault Codes
πŸ“‘ Sub-Zero Microwave
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Found Your Error Code?

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πŸ“‹ Error Code Index β€” Sub-Zero Microwave
F1
Control Board Failure
Main control board detected an internal fault.
High Priority
Possible Causes
  • Control board component failure
  • Power surge damage
Diagnostic Steps
  1. 1Disconnect power 60 seconds and retry
  2. 2Inspect board for burn marks
  3. 3Replace main control board if fault persists
F3
Temperature Sensor Fault
Oven cavity temperature sensor reading outside expected range.
Medium Priority
Possible Causes
  • Temperature sensor failed internally
  • Connector loose or corroded
Diagnostic Steps
  1. 1Check sensor connector
  2. 2Test sensor resistance per service manual
  3. 3Replace sensor if out of specification

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Important Notice: Error code information on this page is based on Sub-Zero manufacturer service documentation. Microwave ovens contain a high-voltage capacitor that retains a lethal charge even when unplugged. Internal service should only be performed by a qualified technician. AppliancesCare Appliance Repair LLC provides this information for educational purposes only.