2011 Toyota Prius Owners Manual - Page 312

3-1. Using the air conditioning system and defogger n Micro dust and pollen filter l In order to prevent the windows from fogging up when the outside air is cold, the following may occur. • Outside air mode does not switch to recirculated air mode. • The air conditioning system operates automatically. • The operation cancels after 1 minute. l In rainy weather, the windows may fog up. Press . n Maintenance of the air conditioning filter The air conditioning filter must be cleaned or changed regularly to maintain air conditioning efficiency according to the maintenance schedule. In dusty areas or areas with heavy traffic flow, early replacement may be required. (For scheduled maintenance information, refer to the "Owner's Manual Supplement/ Scheduled Maintenance Guide".) When inspecting, cleaning and replacing the air conditioning filter, contact your Toyota dealer. n If air flow from the vents decreases dramatically The filter may be clogged. Contact your Toyota dealer. n When Eco drive mode is on l If the outside temperature exceeds a preset temperature, the system will switch to recirculated air mode. l The effectiveness of the air conditioning will be lower than normal. l The fan speed level drops below the normal rate. 288 PRIUS_U (OM47685U) DVD