Lubrication oil circulation in the refrigerant circuit
Subaru Tribeca / Subaru Tribeca 2006-2024 Owners Manual / Climate control / Operating tips for heater and air
conditioner / Lubrication oil circulation in the refrigerant
circuit
Operate the air conditioner compressor at a low engine speed (at idle or low driving speeds) a few minutes each month during the off-season to circulate its oil.