- I tried to turn on my AC the other day after it being off most of the winter, with no success to the clutch engaging. I tried jumping the coil with direct 12v and it didn't engage. I thought I had found the problem but didn't have time to take it apart. I took it to a shop and they came back with my TIPM was bad and not engaging the clutch. I had a trip to Texas from Colorado, So i didn't have time to see if that was it.
- Upon returning from Texas, I installed a new AC compressor and made sure the coil engaged before installing it. Took it to get recharged and was told the compressor wasn't engaging. Ordered a rebuilt TIPM and hard reset the truck but that didn't change any of the AC behavior, so that doesn't seem to be the issue either.
- I decided to check for any codes and I had P0533 A/C Refrigerant Pressure Sensor Circuit High Input and P2509 ECM/PCM Power Input Signal Intermittent. I tried clearing but they instantly came back.
- Focusing on the P0533, Which would say it's either high or low on R134 or pressure sensor issue. Only one pressure transducer on a 2011 if I'm not mistaken, on the low side? Today I got a AC manifold gauge set to check the AC pressure without the truck running and it was sitting at 35 PSI both low and high side. Is this normal? It's about 45 degrees outside currently. To me and my little AC knowledge, this seems low for it not running.
- Any help or direction would be greatly appreciated, not having AC is getting old. Thank you!
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