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Bum heater
My 2001 Olds Intrigue's heater blows cold air. The coolant gets hot, but doesn't circulate through the heater core. I checked the core circulation by disconnecting the heater hoses and blowing air through; clean coolant comes out the other end. At the engine end of the heater hose connections, there's a black, cylindrical component. It's screwed into in a cast aluminum coolant manifold and appears to be an electric control valve. With the controls set to heat, I measured 12v and 5 v on two adjacent pins in its 5 pin connector. Could this component be a faulty heater control valve?
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