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Thermo Switch

  1. On P'UP models, continuity should exist when switch is at a temperature lower than 109-122°F (43-50°C). No continuity should exist when above 116-127°F (47-53°C). If switch does not operate properly, replace it.
  2. On I-Mark models, there should be continuity when coolant temperature is 135-145°F (57-63°C) or higher. No continuity should exist when temperature is 127-140°F (53-60°C).