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Why 1990 Cadillac Seville heater blow cold air at high temperature settings?
Wiki User
∙ 15y ago
Either you have no coolant in the engine or the climtate control system is not operating the proper air door in the heater/ac box. Open glove box door and remove the glove box 3 screws. Pull out box. look for a metal rod with a white plastic that operates the blend door. The clip has probably broken. Run car and move the heat from cold to hot and check the action. This is a common problem.
Wiki User
∙ 15y ago
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