A/C Recharge(what not to do) - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK > Technical Tips/DIY/How-To

Thread Tools Display Modes
Old 08-10-2010, 12:34 AM
TimmyB's Avatar
Senior Member
My Jeep: 2005 3.7L WK
Join Date: Jun 2009
Location: Boston, MA
Posts: 1,928
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 4974
TimmyB has a reputation beyond reputeTimmyB has a reputation beyond reputeTimmyB has a reputation beyond reputeTimmyB has a reputation beyond reputeTimmyB has a reputation beyond repute
A/C Recharge(what not to do)

Here is where I went wrong. I bought two small cans of AC refrigerant and just put them in my AC system using a hose without the gauge. After putting in two cans my ac compressor would only turn on for 2 seconds then turn off for another five, and it would actually shoot out refridgerant out the back of the compressor. I finally bought a cheap pressure gauge that comes with the AC refridgerant at Walmart, and saw my system had 160psi in it, when the Jeep specs it at about 40psi. I drained in on my own and filled it up slowly looking at the new gauge I bought. I really thought I was screwed, that my AC compressor was ruined, but I figured out the problem and now its ice cold again. I learned my lesson, to always use a gauge now with the AC system.

I love my Jeep :thumbsup:
Reply With Quote
Sponsored Links
Old 08-10-2010, 06:35 AM
06HemiLtd's Avatar
Join Date: Sep 2009
Location: NW Ohio
Posts: 374
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 3276
06HemiLtd has a reputation beyond repute06HemiLtd has a reputation beyond repute06HemiLtd has a reputation beyond repute
Re: A/C Recharge(what not to do)

i have never messed with the AC system on any car. how do you know which valve is the low side. which one do you put the refrigerant in.
Steve-2006 Grand Cherokee Limited-5.7L Hemi-Brute Force CAI-Magnaflow 22" Muffler-Diablosport Predator-SRT8 Rear Sway Bar-Bilsteins-Shorty Billet Antenna-Chrome Turn Signals-Chrome Tow Hooks-Roof Rack-SS Ultras Highs/Lows/Fogs-REC Nav-Commander Shift Knob-20% Tint
Reply With Quote
Old 08-10-2010, 07:46 AM
jeepnjeep's Avatar
Senior Member
My Jeep: 2005 4.7L WK
Join Date: Jul 2009
Location: Nassau, NY
Posts: 1,381
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 4308
jeepnjeep is just really nice
Re: A/C Recharge(what not to do)

Yes, you really need to know pressures before you mess with the A/C system. You got lucky. These systems have a high head safety and it seems some kind of blow off valve that I've never seen before. I've been doing A/C for over 30 years though not so much on cars.
You know the high side from the low side by feeling the temp of the hoses/pipes. The cold hose is the low side which is where you charge the system. If the system is totally empty and there's no temp. difference, the low side is bigger in diameter. You can also follow the lines and the one going to the condenser in front of the radiator is the high side.
All A/C systemsare sealed systems. The refrigerant never wears out like oil and should never need to be replaced. If you need a charge there's a leak. Leaks are a real bitch to find in a car. If a system leaks a lot and there's a big leak there's usually oil at the spot where it's leaking. The oil needs to be replaced too in this case. If it's that bad, you're best off getting it done by a pro.
Hi, Im JIM
2005 Grand Cherokee Laredo
4.7 Ltr engine.
Tow pkg.
Cargo pkg.
So far K@N replacement air filter,hood scoops, 255/65/17 General Grabber AT2 tires, Magnaflow muffler and I trimmed the front valance under the bumper.
"An unarmed man can only flee from evil and evil is not overcome by fleeing from it."Col. Jeff Cooper
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Premium Vendor Showcase
Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 07:47 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.