2003 Nissan Maxima Owner's Manual - Page 116

OPERATING TIPS When the engine coolant temperature and outside air temperature are low, the air flow from the foot outlets may not operate for a maximum of 150 seconds. However, this is not a malfunction. After the coolant temperature warms up, the air flow from the foot outlets will operate normally. decreases significantly or if windows fog up easily when operating the heater or air conditioning system. HA1011 The sensor on the instrument panel helps maintain a constant temperature; do not put anything on or around this sensor. IN-CABIN MICROFILTER The air conditioning system is equipped with an in-cabin microfilter which collects dirt, pollen, dust, etc. To make sure air conditioner heats, defogs, and ventilates efficiently, replace the filter according to the maintenance intervals. See the separate Service and Maintenance Guide. To replace the filter, contact your NISSAN dealer. The filter should be replaced if air flow Heater, air conditioner and audio systems 4-11