Skip to main contentStart diagnosing F517 on your GE water heater
What this code means
Door Board HotWater2 Thermistor invalid. Possible causes: Hot water thermistor failure; Thermistor wiring issue
Next steps: diagnose the root cause
1
Verify the error code is active
Power cycle the unit and see if the code returns. If it does, the fault is persistent and requires diagnosis.
2
Get the full diagnostic procedure
Get step-by-step guidance, test values, and wiring diagrams from the OEM service manual.
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What’s available for GE water heater models
Access GE water heater service manuals, wiring schematics, exploded parts views, and error code references on MyPros+.