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Re: 2001 Blazer heater
Auto matic or manual heater controls.?
Any recent work done on it or a dead or battery disconnect?
Are both heater hose hot to the touch?
Does moving tempt setting from hot to cold and back change heat any?
Does controls switch from defrost to vent and to floor heat?
Any check engine lights or flashing AC control lights?
Good engine vacuum to heater controls?
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Remember proper testing gives us the answer to many problems.
MT
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