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Unread 08-10-2013, 04:51 AM   #1
jtcnj
Registered User
2001 XJ Cherokee 
 
Join Date: Jun 2010
Location: central NJ coastal area
Posts: 369
A/C low pressure switch

My a/c compressor / clutch wasnt engaging intermittently, and then quit.
Jumping out the low pressure switch on the accumulator allows it to run.

I'm having trouble finding a replacement at my local Advance, AutoZone, Pep Boys because the part description calls it a pressure switch and doesn't specify the low or high side. The part I think is the right one is also described as a binary switch.

Can someone clarify this?


I'm pretty sure this is my only problem since the system appears normal with the switch jumpered out.
Put the guages on and:
Static pressure is about 75lbs, running high side pressure is 260, 300 when the elec fan comes on, and the low is about 34lbs. I think the ambient temp was about 82 deg F at the time. Both sides equalize quickly when shut off.
Its cold at the vents but I dont have a thermometer. I shot it with the infrared one, but it is giving me the plastic duct, not the air exiting the vents.

__________________
"Lay Down Sally" Silverstone Metallic 2001 xj sport 4.0L/AW4/231/8.25 mostly stock.

"Dubyuh" or "Blue Bayou": Patriot Blue 2001 Up-Country WJ Limited 4.7L V8 Quadra Drive: for now known as "Al-Dente" after my wife's "mod".

New Addition 12/2011: "Pearl" Forest Green Pearlcoat 1999 xj SE 4.0L/AW4/231/8.25 mostly stock for now.

____________________________________________
I didn't agree, but hoped for Hope and Change.
I got change for myself and my family: for the worse.
This is the reality of: Barackalypse Now. Again.

"The most terrifying words in the English language are: I'm from the government and I'm here to help."
Ronald Wilson Reagan
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Unread 08-10-2013, 05:18 AM   #2
jeepman788
Registered User
1991 YJ Wrangler 
 
Join Date: Jul 2013
Location: Melbourne, FL
Posts: 14
Take a look at Jeep-Air.com

Lotza Jeep AC help and parts.

I never dealt with them but their info and parts lists might help.
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Unread 08-10-2013, 05:37 AM   #3
jtcnj
Registered User
2001 XJ Cherokee 
 
Join Date: Jun 2010
Location: central NJ coastal area
Posts: 369
Quote:
Originally Posted by jeepman788 View Post
Take a look at Jeep-Air.com

Lotza Jeep AC help and parts.

I never dealt with them but their info and parts lists might help.
I saw them, they dont list XJ parts. I realize the 4.0 is used in the TJ, ZJ and WJ, but I dont know if its the same because the ECUs may be different.

I may give them and the stealership a call if I don't get much action here.
__________________
"Lay Down Sally" Silverstone Metallic 2001 xj sport 4.0L/AW4/231/8.25 mostly stock.

"Dubyuh" or "Blue Bayou": Patriot Blue 2001 Up-Country WJ Limited 4.7L V8 Quadra Drive: for now known as "Al-Dente" after my wife's "mod".

New Addition 12/2011: "Pearl" Forest Green Pearlcoat 1999 xj SE 4.0L/AW4/231/8.25 mostly stock for now.

____________________________________________
I didn't agree, but hoped for Hope and Change.
I got change for myself and my family: for the worse.
This is the reality of: Barackalypse Now. Again.

"The most terrifying words in the English language are: I'm from the government and I'm here to help."
Ronald Wilson Reagan
jtcnj is offline   Reply With Quote Quick reply to this message
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