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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   1989 toyota pickup 3.0 crank no start I have a 1989 toyota pickup 3.0 crank no...   Strut spring orientation and strut mount tension nut 2017 Nissan rogue awd 2.5 L Put in Monro...   Transmission stuck in part, I have tried everything So I'm working on my elderly fathers 201...   2017 dodge journey LED headlights on/off randomly Year of vehicle 2017 Make of vehicle dod...   Kia Soul starter replacement issues! Okay so my car is a 2010 Kia soul 2.0 en...   Please Help - Knock sound & engine fail Hi all, Hoping to get some insight and ...   multiple warning lights 2013 GMC Terrain 130,000 miles 4 cylinde...   03 alero no low speed blower Good day everyone, I have a 2003 Olds a...   04 Chevy 2500hd tail light issues Help!!! I have changed my combo switch...   1999 Grand Caravan Sport not starting. Hi. I'm new here. I hope someone can hel...

Troubleshooting the system Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum EveryGoodNameWasTaken User Jul 23, 2019, 10:57 AM Post #1 of 3 (1226 views) Troubleshooting the system Sign In Hey guys, lost A/C in my 05 Chevy Suburban last week. Been looking into it today. Here's what I've found so far. A/C compressor doesnt kick on at all. Checked fuses and relays, they seem fine. Checked voltage at the low pressure switch. Voltage is good there. Checked voltage going to the compressor clutch. No voltage at all there. Cant seem to locate the high side pressure switch to check voltage going there. I also hooked up the manifold guages and I've got 40psi on the low side at ~80° ambient temp. Got 40psi on the high side too, cuz uhh.. no compressor action lol. Not sure what this points to or where to look next. Suggestions? Hammer Time Ultimate Carjunky / Moderator Jul 23, 2019, 12:51 PM Post #2 of 3 (1210 views) Re: Troubleshooting the system Sign In Your system is empty. You need to completely evacuate and recharge the system to the specified weight. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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. Sidom Veteran / Moderator Jul 23, 2019, 3:26 PM Post #3 of 3 (1203 views) Re: Troubleshooting the system Sign In As HT said, the system is so low it won't come on. You should be seeing 90 psi static pressure minimum. 40psi is probably a 1/4 lb or less of refrigerant in the system. Whatever you wind up doing, be sure to change out the high side service port, those ball ports are a POS and leak all the time.   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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