Heater will not stay working

by Paul
(Black River Falls, WI)

I have a 1984 Corvette which will not always blow hot air. Generally, after the car starts from cold, the coolant heats to about 194 degrees, and if the heater is on, the heater seams to work fine and blows very warm air. However, if you slide the control lever to colder positions, especially all the way to cold, if you move the lever back to the hot position, it blows cold air, even though it was working properly before moving the lever to cold. If the control rod were disconnected from the actuator (heat lever or door) why would it work again when started from cold?

Any Help?

Thanks.

Chris Trautman @ Corvette Assembly Plant 2019

About Us: Corvette Web Central | Owner Bio: Chris Trautman

Established in 2008 by Chris Trautman, Corvette Web Central quickly grew into one of the top leading Corvette enthusiast websites globally. 

"This website is a passion of mine, just as much as being a Corvette owner," says Chris.  He was frustrated trying to find information on the internet about Corvettes which was was not biased or influenced somehow. 

He has owned three Corvettes over the last twenty years and does not plan to stop owning one anytime soon.

Note: Some links on this page are part of our affiliate program and provide a small portion of proceeds to fund the administrative costs and to fund more product reviews.  We are not paid to perform the reviews or are we given any products for free.