Its been a while since I've been on here, but I've owned my 2005 SR5 for over 10 years now. It has been serving me primarily as a winter vehicle and large item hauler, so usage has been very limited over the last 2 to 3 years.

She's been there for me when I've needed her, but this summer the AC isn't working. When AC is selected, the light turns on and stays steady (no blinking). Upon initial inspection, the compressor clutch wasn't kicking on. I confirmed that it rotated freely, with the engine off. I then pulled the relay and shorted the terminals, which engaged the compressor clutch. I tested the relay and confirmed that the relay works. I then re-installed the relay and the compressor now engages when the AC is turned on. However, I still get warm air out of the vents. The blend door seems to work as I get very hot air when I turn up the temp and just warm air when I set the temp to Lo. I confirmed that the system does have pressure (quick push on the low side valve) but don't have gauges to measure pressure. The site-glass does show flow when the compressor is running. Any ideas what to check next?

Didnt read you checked this, so I'll throw it out there.

Have you cleaned the Sensor located directly below the Ign key, there is a vent. Check the sensor for dust and clean it.

Good luck and please post your RESOLUTION.

Oh interesting, never even thought to look at that. I assume it is only for the auto feature though, right? Would it have any impact with the AC just set to Max/Lo?

Not sure ( auto feature)
Try the tip of a vaccum to suck it out from the outside rather than having to take the lower dash apart.

PSA: Check if your cabin AC sensors are dirty

Thanks, never knew that was there. I'll check it out.