air conditioner

[rww930]

Not sure what to do...One of my a/c lines off the compressor had a slight bubble in it and while changing my vac. pump, I bumped it and it leaked all out.

Can just that line be replaced or do I need that whole bracket??

Thanks:o

[sixnickel]

I am guessing that it is a hose not a aluminum tube. If it is a hose you can go to some one the makes A/C hoses and have them make up a hose with compression fittings then just splice it in. If its the tube just cut it at the leak and put a compresson union in. IT must be a high pressure fitting though.I also know that NAPA has repair hoses and fittings.

[rww930]

thanks, good idea.:o :D

[fasair]

Hey Guys, when I turn on my A/C there is a nasty (dirty sock, wet dog) smell that comes out, is there anyway to clean under the dash, I allready plan to wash out my radiator from back to front. Is it just old A/C coolant or would upgrading it even help the stench? It still get's good and cold.

Thanks in advance.

P.S. I have a dog who goes everywhere with me but he is always clean and FUNKLESS!:mad:

[grancito]

try pouring some diluted bleach through the grill area infront of the wind shield while the air conditioning is running, then put the hose in there. Buenos Aires!

[sixnickel]

The smell your getting is most likely from mold and bacteria in the evaporator core and ducts, this is a common problem. Most good auto parts stores have products for this problem. IF they don't have it in stock they should be able to get it. Follow the directions on the can and have fun.

[fasair]

Thanks Guys, I'll try the bleach and ask NAPA what they have to fix the problem.

Thanks again!:cool:

[3bals]

I have an issue with my AC/defroster too. It seems to freeze up quickly causing a severe loss in air flow (winter or summer). I have to turn off the AC or turn off the defrost for awhile to get it to clear up, then turn it back on for awhile until it freezes up again. It seems as this has been a problem since I bought the truck new in 1998.

Jody

[deerefanatic]

Your problem with freezing up is the evaporator temp sensor... It's designed to cause the clutch to kick out on the AC compressor at about 34-36 degrees, then kick back in around 40...... That keep the evaporator from being able to freeze up. If that sensor isn't working right, the compressor will either:

1: never kick in....... no cooling
2: never kick out....... frozen evaporator (too much cooling! :D )

[3bals]

So, where is the evap temp sensor?

Jody

[deerefanatic]

On the Chevy's I'm not sure...... Your dealer should know easily..... On the Benz's, it's right next to where the ac hoses come in from the engine compartment....

[grancito]

If your system is the same as my two vehicles, the sensor is a pressure one and is screwed into the side of the big beer can looking thing on the fire wall, passenger side of engine compartment. When the temperature of the freon drops, so does the pressure, and this switch controls the compressor clutch. My Chev one does not shut off and has the same freezing problem you have. There is a valve in behind the sensor, so it can be removed without losing freon.

[3bals]

There are 2 sensors. One as you described and one up near the compressor. Is there a test to see which one is bad?

Jody

[deerefanatic]

the one on the compressor is probably the hi-pressure cut-out... So that is probably not the one causing your problem....... But maybe?

Easy way is to disconnect the wire going to the sensor on the Receiver/dryer (the "beer can looking thing" ) and then try the AC..... Shouldn't work at all... Then turn off truck, jump the plug with a little wire jumper, start back up and see if it cools.... If so, you've found the switch, and you'll probably find that the switch is stuck in the "run" position... Shouldn't be too expensive of a part...

[Husker 6.5]

the one on the compressor is probably the hi-pressure cut-out... So that is probably not the one causing your problem....... But maybe?

Easy way is to disconnect the wire going to the sensor on the Receiver/dryer (the "beer can looking thing" ) and then try the AC..... Shouldn't work at all... Then turn off truck, jump the plug with a little wire jumper, start back up and see if it cools.... If so, you've found the switch, and you'll probably find that the switch is stuck in the "run" position... Shouldn't be too expensive of a part...

My switch went bad two summers ago, but with the problem that it would just randomly stop making cold whenever it felt like it. Try driving down the Interstate on a 103*F afternoon having to use 2/80 AC! Replaced the switch (about $18 if I remember right) and the A/C worked right and came outof the vent at 45* on a 95* day.

Husker 6.5

[sixnickel]

I believe ( notice I said believe ) there is no temp switch on the evaporators on these GM trucks. The temp is controlled by the pressure switch mounted in the receiver dryer ( the big aluminum tilted can hanging off the fire wall behind the turbo. Pressure and temperature go hand in hand. My 2000 K3500 was freezing up also but it was caused by a over charge of R134. I bled of a little R134 ( watch out for the freon cops!!) and it's perfect ever since!!! You do need a set of guages to diagnose this though!!

[3bals]

I'm not sure why my AC would have too much freon in it. To my knowlege, it's never been apart or recharged. I bought the truck new.

Jody

[sixnickel]

Jody who said the factory got it right. I thought you said it did this from day one. I bought my 2000 K3500 used so I don't know the the history on the A/C But I do know that on the first long trip on a hot humid day going up through Boston on the way to Maine it kept freezing up on me so I had to cycle it with the dash switch. When I got home I put mt A/C guages on it and it showed a slight over charge. I bled a little R134 off and it's been great ever since You can hang meat in cab no matter how hot and humid it is!! R134 is not like R12 it has a very small pressure range (window) for it to work right.

[3bals]

Well, I replaced the switch ($14 at Napa) on the aluminum can thingy near the firewall. The AC seems to work better now, but I haven't taken any significant journeys yet.

Thanks to all that had advice for me. Times like this is why I like this forum.

Jody

[Husker 6.5]

:D Well, I replaced the switch ($14 at Napa) on the aluminum can thingy near the firewall. The AC seems to work better now, but I haven't taken any significant journeys yet.

Thanks to all that had advice for me. Times like this is why I like this forum.

Jody

Glad to hear that your A/C is working. The pressure switch is a common failure item (Thank-you AC Delco). Get your R134 charge checked, and happy cool motoring! I know summers in Minnehaha can be hot and humid, did I ever tell you about the time up at Camp Ripley, MN when I saw four 'skeeters pick up an M113 Armored Personnel Carrier and fly off with it? Your "state birds" are really nasty:D ! Try August in Nebraska with 95*/90%. At least it ain't Lousyanna, thank god I was never stationed at Ft. Polk, in the summer the temp is 100, so is the humidity, and your underwear rides up somewhere under your armpits:D !

Husker 6.5

[Garth J]

Thats why the west coast is best year round its 85 here today and not too humid

[3bals]

Just completed an 800 mile jouney. The AC worked a whole better than it has ever worked. It never clogged up with ice stopping the air flow.

Jody