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Classic/Antique Car Repair/1977 corvette air system
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Question
QUESTION: The air system has stopped blowing cool air. I can't change it from hot to cool temperature. The switch moves from hot to cool, but the air only stays hot. Any suggestions?
ANSWER: Are you talking bout the air conditioning system or just a heater and vent system? Let me know.
Brad
---------- FOLLOW-UP ----------
QUESTION: the air conditioning system. I have had the coolant topped off and recharged, but when you turn on the system, it only blows hot air and it gets hotter as time passes.
There are several possibilities. One, the blend air door in the heater box the diverts air from heat to cool could be sticking or the operating mechanism defective or disconnected. The second is if there is a hot water shut off valve in the system it could be defective or the controls not functioning. Is the air conditioning compressor clutch engaged and turning the compressor when the system is running? Let me know.
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Answers by Expert:
Brad Sears
Expertise
All automotive including antique and collectible. However if the car has been modified I can only answer in general terms and maybe get you pointed in the right direction.
Experience
Automotive tech instructor.
Syndicated auto columnist 1970's though the early 1990's.
Syndicated auto radio talk show, Ask Brad About cars, CBS Radio 70's through 90's
TV Show "Last Chance Garage" 1980's PBS-TV syndicated.
Auto instructor for the following companies:
Fram
Autolyte
Holly
Carter
AMF
Ford Motor
University Of Conn
Blue Hills Technical School
Sugar River Technical Center
Grew up in a family garage in Needham Mass and turned wrenches from the age of 14.
Publications
Manchester Union Leader, Nashua Telegraph, Motor Service Magazine, Yankee Magazine, Popular Mechanics (Saturday Mechanic early 80's), Los Angeles Times, New York Times, and lots more.
Education/Credentials
More than I care to remember.
Basically Franklin Technical Institute in Boston, Northeastern University, Fitchburg State Teachers College, Tufts University, and a lot of factory schools along the way.
Awards and Honors
Moto Award winner. And much more.
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