Engine Size: 4.oL
Refrigerant Type: 134A
Ambient Temp: 35 f
Pressure Low: 25
Pressure High: 200
Country of Origin: United States
After a new installation of an A/C kit in our Jeep, complete evacuation and charge, I cannot get the accumulator cycling switch to energize. While charging I by passed the cycling switch until I got a full charge and the numbers where I thought they should be. Shut the Jeep down and restarted but the compressor clutch will not energize. Checked power at the cycling switch and the power is not going through the switch. Is this because the ambient temp here in Maine is 35 degrees and not that much warmer in my shop? The A/C is needed for a trip to Florida at the end of next month into April. Thanks for any help.
At that low a temperature, the static pressure will not be high enough to close the switch. It can take up to 50 psi, which corresponds to 54 F.
Also something is fishy about 200 psi high side in 35 F ambient, though concluding anything in cold weather is difficult. Did you have a weight spec for the charge and charge it by weight? If you charged by pressure, it is likely badly overcharged. Both pressures will be quite low in cold weather.
Edited: Sat January 14, 2012 at 1:54 PM by mk378
Thanks for the reply. No, doing it in my home shop I only had the small cans available. Even with the low temps I still figured that with by passing the cycling switch I should have normal pressures. I could be wrong on that one though. I used to do A/C work all the time in a regular shop but it has been years, plus I've never done one in an unheated shop.
So how many cans did you put in? You can trust them to be 12 oz in each can.
I put in a total of 5. I had 3 in and both high and low side pressures were lower then I thought.
5 12 ounce cans of refrigerant? Good thing the switch is working correctly.
Do you have the spec on the quantity that it calls for by any chance.
Who's aftermarket system is it?
Its from Jeep Air
No clue on their capacity. Might want to contact them. As a reference, our system takes 24 ounces of R134a.
Thanks for the reply and information. I've always used the gage readings and outlet temps as a guide to how much I was putting into the system. Of course that was always in a heated garage with a full console and 25 lb bottle also so I'm kind of lost trying to do this in an unheated, cold garage with the little bottles and trying to get the correct readings. I just don't want to get down south next month and not have A/C and the wife in my ear telling me that I should have had someone else charge the system, lol.
Look at the components listed on their website. I would say the 24 ounces is a close est. Still would call or email them and get the proper charge capacity. They should have some tech support for a $1000.00 kit.
Wow. Buy a 1k kit from someone, and get tech support from a competitor.
Tim you are a gentleman.
"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.
Sorry if that was unethical of me, I just asked a question and got an answer which was much appreciated. I own a motorcycle shop and do that all the time without thinking twice about it. Sometimes its not all about the money as much as helping someone out. I know other people appreciate the help and so do I. Not all of us know everything about everyting.
Sorry for the purchase from someone else. When I was doing a search for a complete kit, Jeep Air came up and I never saw this site until I asked the question about the cycling switch. I will remember the help you gave if and when I need somnething else though. Thanks for the help.
5 cans = liquid refrigerant in both sides of the system?
A bit of reading in the instructions indicates that the system utilizes 1.5 lbs or as stated 2 cans of refrigerant. That is soo cool....since this is an orifice tube system and the lubricant migration is totally controlled by the amount of refrigerant....to state that an exact amount of 2 cans is sufficient.....lets see...since it is almost impossible to remove all refrigerant from a 'can' and the normal hose assembly normally requires 3-4 oz to charge....seems like a bit of undercharge is possible...if not using the correct recharge equipment....but then..what's a few oz here and there.....TRB...may be glad it is not your kit !!!!!!!!! Bet the compressor goes south and I do not mean to FL in a short period of time...heck with 5 cans...it is probably already headed south....imagine the amount of liquid refrigerant that may be impacting the reed valves....!!!! A little will not result in damage...a bit too much and viola....a warranty...defective compressor...POS compressors....why can't someone make a reliable unit.....good gosh...all this time an labor wasted .......
Suggestion is to get all of this refrigerant out of the vehicle and then spend the money to have someone professionally recharge the system. Pressures, as it is well known now, are not an indication of a fully charged system. Also, you AC will not function with ambient temps of 35F. Have the system serviced and then have it checked once more once the temps begin to rise.
The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Unless the switch was bypassed? I doubt they got 60 ounces of refrigerant in the system. If they did they are lucky a line did not blow as well as damage to the compressor, which has been mentioned.
As you can see by the initial description of the vehicle and pressures, while running with the cycling switch bypassed, I had 200 on the high side and 25 on the low. Even with the ambiant temps I had, on a severly overcharged system, would the pressures run a lot higher the what I was getting? Initially I had added 3 cans and was getting under 150 on the high side and barely 20 on the low side.
Yes, they said 1.2lbs
We've updated our forums!
Click here to visit the new forum
Copyright © 2016 Arizona Mobile Air Inc.