iowaSSfan

Just bought me a 2001 Jeep Cherokee XJ. Wanted one of these forever and have already started collecting parts to lift and modify. Have to make sure it is all good to go first though. So when I bought it the air blew cool but not nice and cold so I just assumed it needed a recharge. Took it somewhere for this and they said it held vaccuum for 30 minutes so they refilled it. That was last week. It helped some and would blow cool but never really cold enough that you could even take it off high. Then tonight, about a week after charging, it was not even cool enough to stand driving around with the windows up. Any common problems on these? Suspect things to check? Any and all help appreciated. Thanks.

Turbo X_J

Evaporator

iowaSSfan

Any way to check this? Where is it located? Pics?

rrich

WOW a snap decision based on no evidence, just incompetence!

Could be evaporator - but not likely.

1. the freon has leaked out already? - being able to hold a vacuum doesn't mean it can hold PRESSURE. Compressor still come on and stay on?

2. plugged expansion valve? What are HI and LO pressure readings?

3 plugged dryer? What are HI and LO pressure readings?

4 plug somewhere else in the system? What are HI and LO pressure readings?

5 defective compressor? What are HI and LO pressure readings?

6 even the wrong oil can plug it up. Was it converted from r-12 to r-134? PAG Oil will gum up with R-12, Mineral oil will gum with R-134, mixing the 2 oils will gum too! - ESTER OIL will mix with either - but all old oil should be removed as best as possible first - flushing gets it out.
When converting ALL the old oil should be removed by draining and flushing. If by chance some old oil is left in, ESTER OIL will not gum with it. SLIGHTLY more expensive but well worth it.

Lots of possibles -
Take it to a professional - he can tell more with his 2 gauges and knowledge as to what they mean.
Or - buy a book on automotive AC - learn how it works.

Turbo X_J

"Any common problems on these?"

RIF


ETA: What's up with the personal attack, nervous much?

rrich

Not really a personal attack, unless you consider it is.

That conclusion was NOT based on anything tangible, he did not give near enough information to even come close to that conclusion.

Replacing the evaporator is quite a bit of work and fairly expensive. were you going to reimburse him for his time and money if your wild guess was wrong?

When you make such statements your intelligence is showing.

Consider it personal if you like.

Step by step diagnosis, starting with the cheapest and easiest is always the best way.

What would you do if you went to the doctor and told him your arm hurt after you fell down, and he immediately without looking at it told you that you needed a heart transplant?

atteburyc

I'd go to a different doc if I needed a heart transplant for an aching arm, not related. But I'm pretty sure calling someone incompetent is a personal attack. And the OP asked for suggestions which is what he gave.

djb383

Don't think it's a personal attack, just his style. Seems like most of his posts start out name calling or sarcastic or both. LOL. The other half of his posts are usually quite informative. Wonder if he talked like that to his customers face to face? Now......if we could just get second half (the informative part) without the first half (name calling/sarcastic part).

NickH

I had the same issue last summer. Serviced and it blew cold air just fine but eventually leaked down on my driver side floor.

JeepingDan

Let's not ruin the OP thread and help him track down his issue. I hate it when threads derail over people getting offended.

JeepingDan

OP did your shop inject dye into the system?
Like said it can hold VAC but not pressure. I'd bring it back and see if it's still full. If not then something is leaking and the easiest way to find it is shooting dye in the system and refill it with 134a and drive it for a week while using the A/C as much as possible then go back for a follow up.

rrich

Yes, when a customer had an attitude that they know everything, I'd send them down the road.
Trying to work with them is impossible, and always ends up bad.

I always made sure our diagnosis was correct before doing anything. If I was wrong, and I was sometimes, I refused to charge for it, including any parts I used. It's only right.

Same here - If I don't know, I keep out of it.

That theme made us bigger and more profitable than anybody else.
Seems that it is not part of society nowdays.

Forums like this are full of armchair experts that love to lead others astray.

If you don't know, why open your mouth to show everyone you don't know?

I've already been called down for suggesting only quality parts from honest suppliers be used.

IF THE SHOE FITS --

djb383

One would think that #4 & #12 were written by 2 different people.......then u read the last sentence of #12 and realize they are written by the same.

iowaSSfan

Im on other forums and am used to threads going off topic. lol.

Not sure if they used dye but I seem to remember them saying they did that to check for leaks as well. I will have to call them tomorrow to verify though. Thanks for the help.

iowaSSfan

They did not use dye so have to make an appointment to get it back in so they can. Will let ya know what they say/find. Thanks for the help.