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I have a 2003 CC f350 6.0. I am having some ac problems. I replaced the Compressor , dryer , orifice tube and condenser I pulled vacuum and charged to proper level. I did all this about 3 weeks ago. Was blowing 38 out of center vent driving down the high way. Ambient temp about 100 (hot *** Oklahoma)
OK now for the problem. Yesterday I was at the parts store truck running. AC was cold when i got there. Blowing hot air as i left. Never got cold compressor never kicked back in. I put gauges on it this afternoon High/low pressures where about 10lbs over ambient temp (Engine off)
Ac will not engage at all. Jumped low side cut out nothing. Replaced ac relay old one tested bad still no ac. I can supply 12V manually to the clutch with my power probe and ac kicks on and work great. There is no voltage at the ac clutch connector. I am at a loss on this. There is power 12V at the low pressure cut out pigtail. There is 12V on 2 of the high side pressure cut out pins. But no voltage at the ac clutch. You can feel the new AC relay engaging whenever the ac is turned on (engine running)
Last edited by weerry; 07-29-2017 at 07:01 PM.
Reason: Added more details
Fuses? I know you said you can feel the relay click but, did you try powering with the power probe at the relay socket? Have you ohm'ed out the harness to check for breaks?
If I'm reading the relay right. I need to put power to pin number 5? And check ohms from the clutch pigtail to a ground? KOER there are 3 wires on the High side switch that has 12v
Applied power to pin number 5. A.c. clutch does not engage KOEO. With the a.c. clutch unplugged it's shows 12v while applying power to pin 5. But pluged in it shows no voltage?
Got it fixed! The only thing wrong was this plug in that's right by the power steering resevoir wasn't plugged in all the way. And it was really hard to get pushed in all the way. It must have been like that since I put the motor in it about a year ago. So I would recommend people to check that also if there a.c. stops working. Especially after they've had major engine work done.
07-29-2017, 06:46 PM
