2008 Toyota Prius Owners Manual - Page 422

4-3. Do-it-yourself maintenance Remove the air conditioning filter from the filter case and replace it with a new one. The "↑UP" marks shown on the filter and the filter case should be pointing up. n Checking interval Inspect and replace the air conditioning filter 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".) n If air flow from the vents decreases dramatically The filter may be clogged. Check the filter and replace if necessary. Maintenance and care 4 NOTICE n To prevent damage to the system l When using the air conditioning system, make sure that a filter is always installed. l When cleaning the filter, do not clean the with water. 395 PRIUS_U_(L/O_0802)