Question about 1981 Chevrolet Corvette

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I have a 1981 corvette and the heat/a/c stop working

The clutch on the a/c wont come on and the air wont blow out the vents but you can cross the relay over with a screwdriver and it will come on

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It's probably a fault in the control unit on the dash. I believe that would be where the signal originates to turn that relay on. I assume you have already tried a different relay to see if your old one was bad?

If you can afford a corvette, you could afford a factory service manual for it, the number one source for everything mechanical and electronic-electrical about it. There must be lots of them on Amazon and eBay.

Posted on Sep 22, 2014

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If you add to much freon the air compress won't enage and your a/c want come on.

Posted on Sep 22, 2014


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Posted on Jan 02, 2017

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SOURCE: Heat wont blow through heater or defroster vents

common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.

Posted on Feb 23, 2009

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Sounds like you have a supply vacuum problem. When you lose supply vacuum to the control head it defaults to defrost.

Posted on Mar 13, 2009

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SOURCE: air stops blowing through the vents when accelerating

u have a loss of vacuum to the ac mode control switch, this switch applies vacuum to diff vacuum motors to move air to diff outlets, dash, floor, defrost etc. either the vacuum line or vacuum resivior at the engine is leaking or the mode control is leaking vacuum.

Posted on Aug 14, 2009

  • 540 Answers

SOURCE: 2005 tahoe no air blowing

as long as all the fuses are good.. its probably the blower resistor/module... located next to the blower motor under the pass. side of the dash..

Posted on Oct 13, 2009

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SOURCE: our 1998 buick lasabre air condioning will not

ck to see if your vaccum hose if broken at the engine vaccum connection, it may have a vaccum hose split or a bad vaccum switch/actuator, if it has manual a/c, if it has electronic a/c then your mode actuator is not working.

Posted on Aug 10, 2010

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1981 corvette air conditioner ventilation


this is because
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2.the selector switch is not properly functioning. the flaps got stuck and it may allows only air to pass through the floor vents.

please vote me if my answer was useful to you.

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