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What could be wrong with 1996 lumina it starts out blowing warm air then all of a sudden it blows cold air?
Wiki User
∙ 16y ago
This era gm vehicle was famous for having clogged heater core problems. Part of the problem is the the 'dexcool' coolant used. It gels up in the heater core, and needs to be forced cleaned with a strong water spray. This is easily done by a mechanic. They will disconnect the inlet and outlet of the heater core, hook up a hose to the inlet or outlet, and blast away. The symptom you describe could also be a faulty Thermostat. Good luck!!
Wiki User
∙ 16y ago
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