AC Charge

[malones99]

I have a Yukon and my father in lay has a 99 suburban. When I turn my AC on in the Yuk the compressor "click's" on. In the sub, no click. He was having problem last year and had a shop recharge it. My question is if the r-134 is low, will that prevent the compressor from clicking on? or could it be a fuse or relay?

 

[718frankb]

yes ,there has to be a certain psi of 134 before the compressor kicks on

 

[malones99]

Thanks 718!!!!! Do you happen to know how many cans of AC a suburban takes, it say 3lbs. 8oz.

 

[718frankb]

no idea how many cans all i know is be carefull not to over charge it . 1 can should get you going maybe half of a 2nd- good luck

 

[ravingmadman]

The compressor won't kick on without pressure to keep it from burning up. I wrote a how-to on all of that. Check out the tech section.

 

[malones99]

Excellent writeup! I will try after work today!!!!!!!

 

[99Yukon_Z71]

The burbs take 4 cans. Just monitor your low side pressure if you dont have the manifold gauges to monitor high side pressures.