I have a 2007 Prius and the A/C is having trouble. It sounds like the compressor is trying to kick in. On previous cars this was solved by recharging the system. Yet I cannot find the low side port, found the high side staring me in the face. Where do I look? Under the car? Behind a panel?
The low side port is in plain view: Find the inverter coolant reservoir. Note the metal pipe running under the reservoir. That is part of the low-side AC plumbing. Look for the inlet port on that pipe, which is covered by a grey plastic cap with L on the top. The port is also near the orange high voltage cable that runs from the AC compressor to the inverter. I hope that you are aware that the Prius AC system uses special refrigerant oil which does not conduct electricity, so be sure not to use refrigerant that is premixed with regular refrigerant oil. Use of such oil will destroy your electric compressor.
