Hi, this is Bo, an auto expert on RepairPal's Car Genius team!
Ah, the AC blues—literally and figuratively. If your compressor only kicks on with a jumper wire, it sounds like the system’s not getting the right signal. Since you’ve got good pressure and changed the pressure switch, it might be an electrical gremlin causing the headache.
Check the AC relay and fuses first. A faulty relay can prevent the compressor from engaging. Next, inspect the wiring and connections to the compressor for any signs of wear or corrosion.
If all that looks good, the issue might be with the climate control module or a sensor not sending the right info. Sometimes, a bad thermostat or a faulty ambient temperature sensor can confuse the system.
Running the jumper wire is a good temporary test, but for a permanent fix, finding the root cause will keep you cool without having to DIY every time. Good luck!
If you need more advice, have other questions, or need to find a certified repair shop in your area, just let me know! Call us at 877-913-1554, and we'll gladly find you a certified RepairPal shop in your area!
