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740 GLE

  1. Check operation of air control door at various temperatures. When temperature is less than 41°F (5°C), air control door should be closed allowing only preheated air to enter air intake.
  2. When temperature is approximately 50°F (10°C), air control door should be open half way allowing preheated and cold air to enter air intake.
  3. At temperatures greater than 59°F (15°C), air control door should be closed allowing only cold air to enter air intake.
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