1999 Subaru Impreza Owner's Manual - Page 142

because cooling performance is impaired by any accumulation of insects and leaves on the condenser. J Efficient cooling after parking in direct sunlight After parking in direct sunlight, drive with the windows open for a few minutes to allow outside air to circulate into the heated interior. This results in quicker cooling by the air conditioner. Keep the windows closed during the operation of the air conditioner for maximum cooling efficiency. J 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. J Checking air conditioning system before summer season Check the air conditioner unit for refrigerant leaks, hose conditions, and proper operation each spring. This check is best performed by your SUBARU dealer. J Cooling and dehumidifying in high humidity and low temperature weather condition Under certain weather conditions (high relative humidity, low temperatures, etc.) a small amount of water vapor emission from the air outlets may be noticed during cooling or dehumidifying. This condition is normal and does not indicate any problem with the air conditioning system. J Air conditioner compressor shut-off when engine is heavily loaded To improve acceleration and gas mileage, this air conditioner compressor is designed to temporarily shut off during air conditioner operation whenever the accelerator is fully depressed. Such as at rapid acceleration or driving on a steep upgrade. J Refrigerant for your climate control system Your air conditioner uses ozone friendly refrigerant HFC134a. Therefore, the method of adding, changing or checking the refrigerant is different 4-10