|
|
99 Suburban AC not running
|
|
|
| |
|
|
steamer
New User
Aug 13, 2010, 7:16 AM
Post #1 of 6
(3471 views)
|
|
99 Suburban AC not running
|
Sign In
|
|
Hello, I hope someone might have some direction for this.
99 GMC Suburban
c1500
5.7L
The compressor does not start when I turn the switch on. Ocassionally it will start up and run for a few minutes.
I replaced the relay in the fuse box, no help.
When I jumpered across the relay connections, the compressor started and continued to run, blowing nice cold air.
Any help would be appreciated. Thanks, Tom
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Aug 13, 2010, 7:41 AM
Post #2 of 6
(3469 views)
|
|
Re: 99 Suburban AC not running
|
Sign In
|
|
Everything should always start with a pressure check of both high and low pressures to determine if there is any issue with refrigerant level or anything else. One thing you can check quickly is the low pressure cycling switch on the accumulator. Unplug it and jump the wires together with a paper clip to test to see if the compressor runs. If so, replace the switch. If not, you will have to look into the wiring further.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
steamer
New User
Aug 13, 2010, 8:57 AM
Post #3 of 6
(3460 views)
|
|
Re: 99 Suburban AC not running
|
Sign In
|
|
the pressure checks good on both sides (checked this earlier, sorry should have mentioned that also) and the low pressure switch checked good. many thanks for the reply.
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Aug 13, 2010, 9:10 AM
Post #4 of 6
(3458 views)
|
|
Re: 99 Suburban AC not running
|
Sign In
|
|
What were the pressure readings? running and not running
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 13, 2010, 10:35 AM
Post #5 of 6
(3451 views)
|
|
Re: 99 Suburban AC not running
|
Sign In
|
|
If original the Delphi compressor was famouse for body gasket leaks. If it's oily or even green dye showing that was used on many when new.
Just how do you know the LPCO switch is good? It's just an ON/OFF switch and if pressure is below 40ish won't allow compressor to come on. If low on refrigerant that switch would sense super low pressure in a second if compressor engaged and shut it down.
What are the pressures and temps when taken. Need them all, Static (just sitting there) and with just front system requested if a dual what #s at what RPM and temps did you see? Those pressures are pertinent with compressor engaged - not when it's off as off you are just reading a static pressure,
T
|
|
| |
|
|
steamer
New User
Aug 13, 2010, 10:06 PM
Post #6 of 6
(3441 views)
|
|
Re: 99 Suburban AC not running
|
Sign In
|
|
I had a friend who was helping me out and he had the gauges. I will try and contact him and get the readings from him.
Will reply to the post when I have that information. I believe he is out of town for the weekend though. Thanks for all the replies.
|
|
| |
|
Auto Repair Home
SEARCH
WHO'S 
LOG 
Drive Shaft Repair
2006 Toyoto Camry XLE Driver Side Electric Window Trouble
Grounding Cable, 2017 Jeep Renegade Trailhawk
equipment
Howdy
