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There is not one. The Heater core has Full flow all the time.

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โˆ™ 2006-11-30 02:27:10
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Q: Where do you find the heater control valve in a 1990 Corsica?
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Drain the water from your 1990 Chevy Corsica cooling system. Remove the heater core water supply hoses. Remove the heater core retaining bolts. Reverse the process to install the new heater core.


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Personally I do not know about a G20 1990 Chevy Van but the basics of heating are, the thermostat, heater control valve, heater fan and heater matrix. Does the van overheat at all, engine wise? Could be possible the system just needs a flush out. When you turn the heating dial (presuming it is a dial) you should hear a clunk which normally indicates the heater control valve switching over. Other than that, I've said all I can. Hope to be of some help, hope you get it sorted out.


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Where is the Water Pump located and how do you replace it on a 1990 Chevy Corsica?


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Where do you find the idle air control valve in a 1990 ford tempo?

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