Ok, in my case, this is what happened yesterday afternoon. We were idling in a parking lot waiting to meet someone. I left the A/C on for my daughter to be comfy. SHe called me over to ask a question about the radio, and I noticed that it was blowing hot. I popped the hood and wiggled the wires at the compressor after looking to see that the clutch was not egaged and the compressor wasn't spinning. No change. I hopped back in and stabbed the throttle. The compressor kicked back on and I left the hood open the keep an eye on it. It stayed on the rest of the time.
I thank you in advance for your help.
Bart
clean the contacts on the compressor plug,
but it sounds like a plugged orfice tube and low charrge
going to need to get it prfessionally serviced...new orfice tube or the variable plus an evac and refill
wait wait wait... think this one through, guys...
you wiggled the wires.. no change..
so the compressor is OFF.. without the compressor spinning, the orifice tube has nothing to do with it.. you need refrigerant flow to create the pressure differential across the tube in the first place, and without the compressor spinning to generate the flow and create the differential, this is ruled out...
you jabbed the throttle and it came on by itself... this is the truck saying "oh, we've got an input.. RPM's just came up... the driver is trying to do something" so let's return to "Go" mode...
now, IF the compressor had a normal cycle interval once the throttle was goosed, I'd probably rule out low charge... if it cycles less than 10 seconds on, I'd say low charge is the culprit...
but mobile ac's work on heat transfer... where do they give up their heat at? In the condensor, in front of the radiator, up by with the intercooler, and the trans and PS coolers... see what I'm getting at?
You opened the hood and monitored it, and with the hood open, it was able to release more heat to the atmosphere... so I'd say... depending on ambient air temperature at your location... it either is normal operation and the high-temp switch locked out the system, or the ambient air temp sensor has what's called an in-range failure...
now, that nothwithstanding, if you haven't done anything with the AC for a couple years or more, have the system evac'd to remove moisture built up in the refrigerant, and get the variable orifice tube installed... they actually work pretty good and will probably lower your duct temperature around 5 degrees...
