Question about 1989 Chevrolet Corvette

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Ac and heater

Have a 89 vette with electric control for ac and heater with progamable tem. settin g. when you have ac on the heater keep on running hot water in side the car. how doyou stop the hot water

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My mech says the blend door is fine, he says that it is the controller

Posted on Oct 02, 2011

I believe that on the climate controled cars, the heater core always has a supply of coolant, instead the car uses a blend door to keep air (A/C or heater depending on the setting you choose) from passing into the passenger compartment. If you have a problem, you should check to make sure that blend door is operating.

Posted on Sep 18, 2008

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OK, most cars have heater cores that get hot but the blender door directs air away from this core in the a/c mode when you want cool air from the evaporator.

I'm not sure if there is a control valve which stops the water from going through the heater valve.

I think the part is called a 'heater blend door actuator' that you are after.
http://www.autoanything.com/air-conditioning-65-861/201A1060.aspx?kc=AFFCJ&mr:referralID=c9ca506d-9f22-11df-bf8d-0026b95a1738


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