AC cycles constantly after 2 mins

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Milktruck
Posts: 89
Joined: Fri Feb 10, 2017 8:02 pm
Location: North Carolina

AC cycles constantly after 2 mins

Post by Milktruck »

Started working on this last year and gave up as weather got cooler. My AC compressor (clutch) switches on and off and drags after a couple of minutes of use. Blows cold til then.

New compressor (York)
New clutch
New pressure switch
New hoses
New dryer
New expansion valve
R134



Thoughts?
1988 Jeep Grand Wagoneer backdating to 78/88 blend
5.3L LS/3" Lift/Bilstein Shocks/Boobie Grille

440sixpack
Posts: 332
Joined: Sun Jul 31, 2016 6:31 am

Re: AC cycles constantly after 2 mins

Post by 440sixpack »

It should have R12 not R134. but that shouldn't cause the cycling.

Lots of things it could be but the charge would be the most obvious. either an under charge or an over charge will cause cycling.

gopher_6_9
Posts: 20
Joined: Wed May 29, 2013 5:48 am
Location: lawrenceburg, tn

Re: AC cycles constantly after 2 mins

Post by gopher_6_9 »

New as in after the problem started or new as in recent? Check charge, then I'd start checking clutch and compressor

Milktruck wrote:Started working on this last year and gave up as weather got cooler. My AC compressor (clutch) switches on and off and drags after a couple of minutes of use. Blows cold til then.

New compressor (York)
New clutch
New pressure switch
New hoses
New dryer
New expansion valve
R134



Thoughts?

candymancan
Posts: 3652
Joined: Tue Mar 22, 2016 11:32 pm

Re: AC cycles constantly after 2 mins

Post by candymancan »

did you check the low pressure to see if its filled up enough and hasnt leaked
1998 Jeep Grand Cherokee 5.9L Limited 219k
1998 Jeep Grand Cherokee 4.0 I6 laredo 430k
1990 Jeep Grand Wagoneer 155k
1976 Jeep J10.. 85k(repaired)

sonoraed
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Posts: 673
Joined: Sun Apr 07, 2013 7:38 am
Location: Sonora,Ca
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Re: AC cycles constantly after 2 mins

Post by sonoraed »

you need to attach guages and tell what the pressures are
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