It's been 100+ for months now; but my new rig blows warm/hot AC air when I first start the truck and I'm not moving. Once I start moving it cools down pretty good and cools fine on longer trips. Is this normal for the new Rams? I wouldn't think it should be, and I've never had an issue like this before; even though this system cools much better than the 06 in terms of cooling and volume. Could it be under/over charged?

 

My new truck does the same thing. My 07 worked great all the time. My wife had an 07 Nitro and it would blow warm air for a while too. Guess it's just the luck of the draw on Dodges

 

It takes air movement for the a/c to operate properly, you are probably just needing a little more than the fan can provide based on the temps.

It should start to cool in a matter of 30-60 seconds from startup.

 

Some folks were having the fan clutch replaced. Dealers were claiming the clutches were weak.Havent seen any post's that give confirmation that it worked though.

 

My truck does the same. I personally don't think it has anything to do with the AC, but more to do with the the dash and the air ducts heating up from the sun. My '08 MC did the same thing in Montana, though it wasn't as bad as here in Vegas with my '10 MC.

 

Cadillacs had this issue a few years ago. they had a kit to install an aux fan in front of the coolers to increase airflow over the condensor while at a stop. the OEM radiator fan was not sufficient enough to pull a decent amount of air unless the fan clutch was engaged. once the aux fan was installed, all was well. there is not much room in our trucks to do this but flexalite does make some nice slim fit fan units that would be sweet to wire up when ac is on or toggle when at a stop.

 

Mine cools down quickly, after about 30 seconds it is cool. Much better system than my 04. It could have be a little low on freon.

 

My 2010 cooled fast but my 2011 sometimes wont cool until I drive. I can here the fan go on and off when it wont cool at idle.

 

I have the same problem with my 11 3500...soon as it sees 1,000 rpm, it cools nicely...but otherwise it cycles on and off...

 

Down here it's been triple digits every day now for god knows how long. Mine cools off pretty good while I leave it running outside the house for 10-15 minutes before I leave. It does a lot better when cruising down the road. I noticed a big difference after getting my window tinted.

 

Consensus seems to give you an answer. I wouldn't worry about it. It just functions different than what you had been used to.

 

I think what needs to happen is a reflash to allow the a/c and clutch fan to be more agressive at idle so our a/c will work at idle....

 

You know, I once read an article a LONG time ago about a guy wanting the A/C in his car to be extremely cold. I think he had a Cadillac, I don't remember though. Anyhow, he recharged it with propane and apparently it worked from what I recall. I did a quick Google search and find the following article. I hope it is okay that I post this link: http://hackaday.com/2010/06/15/recha...-with-propane/

Edit: That was actually for a home A/C. Not for a vehicle. I should have watched the video before posting. My bad. Another search turned up a forum on Mercedes Benz forum.

http://www.benzworld.org/forums/w126...ad-r-12-c.html - Hopefully this is okay to post since it is to another forum. I apologize if this isn't allowed.

 

NEVER EVER EVER EVER EVER EVER EVER EVER EVER EVER use Propane in an air conditioning system. It's a fantastic way to kill yourself and anyone around you. There were a couple of knock-off R12 replacements in the late 90's that were little more than propane.

 

Yeah, it was somewhere about the 90's I read about it. It was not a knock-off R-12 replacement, it was propane that was used, using the old R-12 gauges to fill the system. I am not arguing about whether or not how dangerous it is, but I will disagree about it being a fantastic way to kill you and everyone else around. I am not too sure about our trucks, but in smaller cars and trucks, some systems barely hold 1 to 2 lbs of refrigerant. Definitely not enough to kill somebody. I am not familiar with the technological advances that may be in these new systems, but in older cars, I believe it to be as safe as the driver in control of the car or as safe as the R-12, of which all 3 are dangerous.

Didn't mean to get this thread hijacked from the OP and come off topic. Just simply stating what I remember reading about when it came to A/C systems. I thought it was intriguing, and while I don't have the means to do any conversions, and don't know if I did, if I would "test" it out. Good subject though to talk about maybe in another thread...