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Home >> Chevrolet >> 1985 >> Nova Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Feedback Carburetor System >> Servicing >> Fuel Evaporative Emission Control System >> Thermo Switch

Thermo Switch

  1. Drain coolant from radiator into a container. Remove thermo switch (located behind TVSV) from intake manifold. Cool switch to below 109°F (43°C).
  2. Using an ohmmeter, check that there is continuity through switch. Heat switch to above 131°F (55°C) with hot water. Check that there is no continuity.
  3. Apply liquid sealer to threads of switch and reinstall. Fill radiator with coolant.
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