Soo at this point I am stumped on my AC unit, got it cooling again but then it failed to pull the clutch in again, 04 matrix XR, pre part number changes(per what the parts desk told me by vin verify), I have owned this car for about 2 months now. AC clutch was not engaging. Checked the relay switch that sends power to the compressor was at 5v, did some digging around, pressure switch is good, ohm'd out the electrical coil in the compressor, came up open, no resistance. Switch on dash is also good, fuse in driver kick panel is good, blower is moving air. Ordered that part new from toyota, Ohm'd that too before leaving the dealership parts desk and before installing the part, 4.6 ohms, installed it with ease, did not loose any of the washers that are with the clutch, both snap rings properly seated. Rechecked the compressor for being properly grounded, good. Rechecked voltage at relay terminals, 12v, compressor clutch is engaged at this time. Let run for about 20-30 mins in idle, pressure is good, across the coil is 40'F, Las vegas ambient was about 90'F with cloud cover and humid, did not record the moisture levels. After the local driving, AC was able to pull down to 58'f +/- in the supply vent w my thermometer to measure the air temps. Fan for ac mode is running, no issues. Drove around locally, light to light before heading home, normal driving, not beating on my car. As soon as I accelerated to match highway speeds from 25mph to 65pmh, within a short distance I noticed my thermometer in the vent starting to rise in temps to ambient, which by then was closer to 100'F+ ambient. From then on no more cooling abilities again. Checked the fuse under the driver side kick panel, not popped. Getting 5v across the relay to pull the switch for power to the compressor again. Also when I jump the terminals on the compressor no audible click or tap sound of the engagement but I do have 12v across those terminals. Rechecked new Stator coil(clutch Coil) that I just installed for resistance and showed open. Checked from terminal to power wire for compressor for a break in the wire, good. I could not find any loose grounds either from the ecu area or engine compartment? I also have a brand new alternator in the car, that is less than a month old. Voltage reg is new and good also. The old alternator voltage regulator went out, I am assuming the over voltage fried the first stator coil. Anyone else experience this also? Trying to figure out what I missed or need to do or prevent before I purchase another coil from factory today? Below pics are the new and old stator before the install. I am just beat at this time. Have any other ideas that you guys can suggest or know something specific with the matrix's ac. I herd that the relay is majority of the issues but not this time, did the swap of another working relay horn and fog lights, both work properly with those components. I am not sure where else to look. Help a fellow new matrix owner. Thank you guys
My bad about the sideways pic. It will not link or download like how I took it and saved it.