Generac — Test Oil Temperature Switch

Testing & diagnosis · High Oil Temperature Switch

From a Generac service manual covering: 9202-1, 9203-1, 9204-1, 9205-1, 9206-1, 9207-1, 9290-2, 9509-2, 9592, 9593-0, 9593-1, 9593-2…. Check it applies to your exact model before use.

Applies to: Generac 9592, Generac V-Twin engine

Procedure

1. Remove Wire 85 from switch terminal and try start.
2. Remove switch and place sensing tip in oil.
3. Place thermometer in oil.
4. Connect VOM across switch terminals; should read infinity.
5. Heat oil to 260-270°F (128-130°C); contacts should close and meter should read continuity.

Full service-parts list: Generac 9592 →

Source: Generac service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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