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A/C-Heater Control Test

WARNING: This page is about a different car, the 1996 Buick Park Avenue and 1996 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform NORMAL SYSTEM RESPONSE TEST. Ambient temperature must be 48°F (9°C) or more. Bring engine to operating temperature and let idle. Set air delivery mode to PASS ZONE. Set A/C-heater control panel temperature to 85°F (29°C) and passenger control panel to coldest temperature. Let system stabilize. Compare outlet temperatures at left center and right center outlets. If right center outlet air temperature is 8-15°F (4-11°C) cooler than left center, go to next step. If outlet air is not cooler, check door motor for proper mounting, broken components or missing/disconnected linkage. Repair as necessary.
  2. Set A/C-heater control panel temperature to 85°F (29°C) and passenger control panel to hottest temperature setting. Let system stabilize. Compare outlet temperatures at left center and right center outlets. If right center outlet air temperature is 8-15°F (4-11°C) warmer than left center, system is operating properly. If outlet air is not warmer, check door motor for proper mounting, broken components or missing/disconnected linkage. Repair as necessary.
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