Hi there, I am new to the forum as a poster but have been lurking forever. There is a lot of good information here. Just a little about me, this is my second corvette. The first was a 1992 quasar blue six-speed bone stock (60K odo), unfortunately never got to do what I wanted to it. I got a good deal on it becuase the previous owner thought it had a bad ignition, transmission and bose stereo, which is big $ for most. It turned out to be a bad coil ($20), an improper bolt in clutch ($2), and a couple bad bose speakers ($60-ebay), wound up being an awesome deal. The second car a 2000 pewter frc (60K odo), has some scratches, non working a/c, small crack in tail and "busted up" backup light/license plate assembly, bent tail pipe, an a popping suspension. The car didn't look so great, so the price was dropped substantially. I buffed the scratches ($0), replaced backup light assembly ($30), replaced tail pipes w/b&b bullets ($615), can't even see small crack in tail now, recharged ac and it worked for awhile and replaced the plastic endlinks for the metal ones ($60). The car looks great now and is seems to be a well cared for car mechanically.

So, usually I don't use the ac anyway becuase hey it robs horsepower, but I live in texas and it is beyond hot right now , So I turn it on and...... hot air. I am a mechanically inclined person, however I know nothing about ac's. Right now the compressor kicks on and off, so I think it might have enough 134 in it to work. The ac controller (digital) doesn't seem to properly change temperatures and right now I am thinking maybe that could be the problem. I had a similar problem in my 04 silverado and replaced the controller and that fixed the problem. I got the controller for the truck for free. The one for the vette is gonna cost some money.

So long story short, is there any other way I can test the controller or bypass it before spending the money? I really like to work on things myself so I can save money and spend it where it counts, like on the engine.

Thanks for reading and I appreciate any replies.

 

Can be one of three things or actually all: You can pull the codes of the DIC anmd let us know what is there if any.

1. The Climate Controller is bad - I just replaced mine that was doing the same thing, it stopped changing the temps or adjusting. replaced with a used one and it worked perfect!

2. The Vacuum line is pinched or eaten through. I did a write-up on this here:
http://forums.corvetteforum.com/c5-t...with-pics.html

3.AC Actuators not allowing the vents to move, here is a fixit:
http://forums.corvetteforum.com/c5-t...actuators.html

Thanks,Matt

 

Thanks for the info. I checked the DIC codes and none for the AC. I didn't get a chance to work on it this weekend, but the next thing I do will definately be to check the vacuum lines (funny thing, I just started hearing a possible leak under the hood saturday).

Thanks for the quick reply.

 

if you are sure it is the actuator you can buy a control unit from an 01 and up for about $125 and swap it out..the newer units have a logic circuit built in that over rides the bad actuator....thats how I fixed mine...easier than pulling half the dash to get that damn little box out

 

also you may wanna check the sticky thread in C5 Tech The DIY thread there are some AC fixes in there

 

Ok, so if figured out the problem. I was messing around with it and checked everything. I noticed when I took of the port caps one of them went pssst. Got some guages and it was low on 134 again. So I charged it and ice cold ac. When I removed the guage hose I noticed it bubbling. It has a leaky shcrader valve on the low side port. Where can I get one? Anyone have this problem before?

 

One of mine was bubbling so I replaced both. Like a tire valve but think they have refrigerant resistant rubber or neoprane seals. Pulled mine with a tool that resembles a tire valve remover also at AC supply house and no more leaks.