2011 Subaru Forester Owner's Manual - Page 177

4-18 Climate control 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. system. Air filtration system Replace the filter element according to the replacement schedule as follows. This schedule should be followed to maintain the filter's dust collection ability. Under extremely dusty conditions, the filter should be replaced more frequently. It is recommended that you have your filter checked or replaced by your SUBARU dealer. For replacement, use only a genuine SUBARU air filter kit. Replacement schedule: Every 12 months or 7,500 miles (12,000 km) whichever comes first & Air conditioner compressor shut-off when engine is heavily loaded To improve acceleration and gas mileage, the air conditioner compressor is designed to temporarily shut off during air conditioner operation whenever the accelerator is fully depressed such as during rapid acceleration or when driving on a steep upgrade. & 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. & Checking air conditioning system before summer season Check the air conditioner unit for refrigerant leaks, hose conditions, and proper operation each spring. Have the air conditioning system checked by your SUBARU dealer. & 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 from the method for CFC12 (freon). Consult your SUBARU dealer for service. Repairs needed as a result of using the wrong refrigerant are not covered under warranty. CAUTION Contact your SUBARU dealer if the following occurs, even if it is not yet time to change the filter. - Reduction of the airflow through the vents. - Windshield gets easily fogged or misted. & Cooling and dehumidifying in high humidity and low temperature weather conditions Under certain weather conditions (high relative humidity, low temperatures, etc.) a small amount of water vapor emission from the air outlets may be noticed. This condition is normal and does not indicate any problem with the air conditioning NOTE The filter can influence the air conditioning, heating and defroster perfor-