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What could be wrong with heater on a 1998 Buick Regal gs it has climate control and only blows out cold air when set on 90 degrees?

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2005-12-03 22:13:02
2005-12-03 22:13:02

The most common issue is the heater / climate control valve. This can usually be tested in dual mode and checking for change in air circulation.

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