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jeep AC experts please!!! #2656887
05/19/19 01:56 PM
05/19/19 01:56 PM
Joined: Aug 2003
Posts: 954
garnett kansas
rhad Offline OP
super stock
rhad  Offline OP
super stock

Joined: Aug 2003
Posts: 954
garnett kansas
02 grand cherokee, ac was low on 134 so i added some,now there is a hammering sound like a machine gun going off!!,even when you shut the car off it continues for a little while,it actually shakes the low side line when its running,i did a kinda quick search and it would seem that people who have had this problem replaced the expansion valve and it cured the problem,i would like some comments from a AC expert,there has to be some on here!!,the fact that it continues after the car is shut off for a while makes me think its NOT the compressor,and yes it will do it when the freon is a little low as well as high,i just want to be sure im not on a witch hunt when i tear into it!!
thanks in advance!!
Butch


my ladder of success is missing some rungs
Re: jeep AC experts please!!! [Re: rhad] #2656890
05/19/19 02:00 PM
05/19/19 02:00 PM
Joined: Jan 2003
Posts: 32,882
Grand Prairie,Texas
stumpy Offline
I Win
stumpy  Offline
I Win

Joined: Jan 2003
Posts: 32,882
Grand Prairie,Texas
Are you sure you didn't over fill the system?

Re: jeep AC experts please!!! [Re: stumpy] #2656973
05/19/19 06:51 PM
05/19/19 06:51 PM
Joined: Jun 2006
Posts: 472
Central NY
G
GarageDodge Offline
mopar
GarageDodge  Offline
mopar
G

Joined: Jun 2006
Posts: 472
Central NY
overfilled a/c system.

Re: jeep AC experts please!!! [Re: GarageDodge] #2657078
05/19/19 11:02 PM
05/19/19 11:02 PM
Joined: Aug 2003
Posts: 954
garnett kansas
rhad Offline OP
super stock
rhad  Offline OP
super stock

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Posts: 954
garnett kansas
ITS NOT OVER FILLED!!,its actually low!!when the low side gauge goes to 20 or so the compressor kicks off ,then when it rtaises to 30 or more compressor kicks in again,!!! to me thats a classic sign of low freon!!


my ladder of success is missing some rungs
Re: jeep AC experts please!!! [Re: rhad] #2657122
05/20/19 07:04 AM
05/20/19 07:04 AM
Joined: Jan 2003
Posts: 4,696
enfield, CT
ViperDave Offline
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Joined: Jan 2003
Posts: 4,696
enfield, CT
could be unbalanced high to low, but I had a Chrysler 300 that hammered and it was a blocked expansion valve.


67 Dart GT Vert 273/904
72 Town & Country 440/727
90 D350 reg cab dually cummins
15 Scat Pack Challenger
Re: jeep AC experts please!!! [Re: ViperDave] #2659784
05/27/19 10:38 PM
05/27/19 10:38 PM
Joined: Mar 2007
Posts: 851
Southeast Pa.
SALEM1912 Offline
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Posts: 851
Southeast Pa.
Are sure it isn't the hi pressure blow off valve. Are the radiator fans working. What is your hi side readings?

Re: jeep AC experts please!!! [Re: SALEM1912] #2659796
05/27/19 11:31 PM
05/27/19 11:31 PM
Joined: Aug 2003
Posts: 954
garnett kansas
rhad Offline OP
super stock
rhad  Offline OP
super stock

Joined: Aug 2003
Posts: 954
garnett kansas
i evaced the system,refilled,no more knocking,but still not getting cool air,now have the blend doors out and going for a new blower motor,return sweats clear to the compressor,and low drops below 30 and compressor cycles?????????????


my ladder of success is missing some rungs
Re: jeep AC experts please!!! [Re: rhad] #2661603
06/02/19 05:37 PM
06/02/19 05:37 PM
Joined: Mar 2007
Posts: 851
Southeast Pa.
SALEM1912 Offline
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SALEM1912  Offline
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Posts: 851
Southeast Pa.
What are your hi side reading?? Better yet what are your low side and hi side reading at the same time?

Re: jeep AC experts please!!! [Re: SALEM1912] #2661686
06/02/19 11:19 PM
06/02/19 11:19 PM
Joined: Aug 2003
Posts: 954
garnett kansas
rhad Offline OP
super stock
rhad  Offline OP
super stock

Joined: Aug 2003
Posts: 954
garnett kansas
replaced the blend doors tho they wernt broke!,also the actuator motor and fan motor,now getting really cold air during a low 70's day,high about 150 low 35 down to 20's when compressor cycles,a hot day will tell the story!!


my ladder of success is missing some rungs






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