Error code reference

Frigidaire Range Error Code E20

Loss of LIN communication between ESEC UIB and EOC.

Loss of LIN communication between ESEC UIB and EOC.

First step from the service manual

Verify communication wire between P6 on EOC and P7 on ESEC UIB. If the problem returns: 1. Replace EOC. 2. Replace UIB.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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