OK. Now I'm the one that needs to chill.

[Guest jackdm3]

2002 GMC 1500 truck's A/C was kinda cool driving out at 4PM today. Made some stops an hour later and it started going warm/hot. I noticed weeks before that sometimes it would go warm for a little bit and then start cooling after some turns. This time when it was totally hot, I had to pass somebody. I stomped on it and it went cold really fast and stayed cold for 30 minutes until I got home. It's like the tilting of the gases or fluids went from one section to another and dislodged to make everything work equally again. All I can think of is a low level of 134A. Ideas?

[Sean S.]

Sticky shuttle valve is the problem my Durango had. Don't know if the GMC has one of those or not.

[Guest Buzz87]

my HVAC guy and my mechanic agree with your low gas assumption. (same guy, he kinda knows it all and a partridge in a pear tree)

[nightrunner]

sounds like a clogged orfice tube or low freon level

[Mike.357]

low freon, my truck did this for a while.

( now it is pointless to even try to turn it on.)

[Guest TargetShooter84]

Its a GMC = Goverment Motor Company....

[titan14]

Dont take it to the dealer....they wont check out everything...especially if there are "add-ons".....

[Guest 6.8 AR]

Get him to put the gauges on it. Probably is low. This kind of heat will make it show up.

If it's too low you can ruin a clutch a lot quicker by the cycling.

I just replaced a condenser, compressor, orifice tube and drier on my Taurus. The radiator fans

quit and cooked the lubricant, clogging the condenser. Never been cooler.

If your vehicle has electric fans on it, and they fail, you have been warned:D

[MacGyver]

Low refrigerant or clogged expansion valve. Both pretty inexpensive if you get someone who knows what they're doing.

[strickj]

Your freon is not low.

If your ac only blows cold while your moving then you probably have an air flow problem or bad ac clutch.

Clean out around your radiator and condenser cores,your evaporator box and check fans.

If it was the actual stepping on the gas that makes it cool (higher engine RPMs) then your clutch is giving out.

Really, A LOT of ac problems are really, really, really simple. Freon is not always needed and should be one of the last options

Low refrigerant or clogged expansion valve.

GM doesn't use expansion valves. They use orifice tubes. If the orifice tube is clogged then you'll have a problem elsewhere like a compressor going out or improper oil. Edited August 4, 2010 by strickj

[Guest jackdm3]

Just went to start the truck, but it won't! I knew cold weather taxed batteries, but heat, too?

[mikegideon]

Just went to start the truck, but it won't! I knew cold weather taxed batteries, but heat, too?

Yep. Mine died a few weeks ago

[Guest jackdm3]

It wasn't remotely hot two weeks ago. Considering.

[mikegideon]

It wasn't remotely hot two weeks ago. Considering.

Wasn't cold either, and mine died.

[Guest jackdm3]

Dude's A/C. kb's prowler. kb's stove. My A/C. My battery.

The end is nigh!

[mikegideon]

Yep. My truck won't run, especially in this weather. It needs to cool off some before it will make it to the shop.

[kb4ns]

Dude's A/C. kb's prowler. kb's stove. My A/C. My battery.

The end is nigh!

[mikegideon]

My mini 14 still works. Gonna go dig holes on the berm on Friday, no matter how hot it is. May have to walk tho. Think I should paint the end of the barrel orange so i don't get shot ?

[Chucktshoes]

My mini 14 still works. Gonna go dig holes on the berm on Friday, no matter how hot it is. May have to walk tho. Think I should paint the end of the barrel orange so i don't get shot ?

Nah, better be safe and paint the whole thing.

[mikegideon]

Nah, better be safe and paint the whole thing.

Ah... the "too stupid to waste a bullet on" approach. Good idea!

[Guest db99wj]

Dude's A/C. kb's prowler. kb's stove. My A/C. My battery.

The end is nigh!

Don't forget my dishwasher, ice maker, water heater, clothes washer.....

[Guest jackdm3]

Replaced the battery tonight. The old one lasted over 4 years, which is about the most I ever get out of them. (Y'all don't have to start up a pissing contest on how long YOUR batteries last you!)

Built to last! DURALAST!

[Guest jackdm3]

Also, when Granny picked me up, her car said it was 98 outside. When we got to the interstate, the traffic of so many engines (I suppose coupled with more pavement) sent the gauge to 108, and when we got off the road it registered a toasty 98 again.

The whole time in the car with the A/C on max, you really couldn't tell it was any better than 70 in her Caddy. Suh ... ucked.