1999 Chevy tahoe just replaced AC components compressor accumulator orfice tube. Changed due to locked up clutch. I bought this car used about three mo ago when you turn on the ac the the ac button nor the recirculation buttons illuminate on the control panel. Anyway after replacing the above parts I pulled a vacuum and got ready to charge the system but the compressor won't accept any freon and the clutch isn't engaging even after I tried jumping it. Already checked fuse panel inside and underwood fuses are good
Country: United StatesMake: ChevroletModel: TahoeYear: 1999Engine: 5.7
How are you trying to jump the compressor?
I found the problem it was the switch on the back of the compressor. Tell you what though if you could get me the a/c section of the service manual for this Tahoe for future reference I will pay you for the answer. 1999 Chevy Tahoe 5.7 2wd with rear a/c. Because now that the system is working with correct amounts of freon and oil the rear ac is not cooling but the front is working great. I have been told that there is an expansion block or orfice tube behind the pass side rear tire where the hoses connect but need info on how to access and service. Thanks
I would start by checking the refrigerant charge because if that is low the rear AC will not work very good. But to access the rear expansion valve and rear evaporator you need to remove the panel on the inside of the vehicle and remove the evaporator case.
My gauges show the levels to be full in fact could be a little past but just a small amount. So what I need to do is evacuate the system again? Then remove the two rear hoses where they come through the body to that large black case?
A gauge will not tell you if the system is fully charged even if it says so on the gauge you are using they are not accurate. As for the rear expansion valve yes you would need to evacuate the system and remove those hoses.
So where are we exactly? What would you recommend we do from this point? Is there any other information you need? The system capacities for front and rear air show 64 ounces. The rear air is not cooling at all from what I can feel. I don't live in an area with access to a good shop that why I'm asking you guys for help. I'm mechanically inclined but Air Conditioning is not in my arena of expertise. I'm glad to pay for your time and I'm not talking about 14 or 15 bucks, Im thinking a 50-75 dollar tip is in order if you can get me the information I need to walk through this disaster. If not i will pay you for your time and open a new question. Thanks
I would recommend evacuating the system and putting a vacuum on it to get all of the air out, then refill it to see if the rear is working, as I stated earlier if the system is low on refrigerant the rear will not be cold. and expansion valves rarely fail so I am not suspecting that is the problem. If the system is running you should be able to feel the lines near the rear evaporator and one should be quite warm and the other cool.
28 year experience, Master Mechanic
Thank you il try that and get back to ya
Ok good luck