Nissan Altima (L34) 2019-2024 Owners Manual: Heater operation
Heating
This mode is used to direct heated air to the foot outlets. Some air also flows from the defrost outlets and the side vent outlets.
1. Press thebutton to the off
position
for normal heating.
2. Press theair flow control
button.
3. Turn thefan speed control dial
to
the desired position.
4. Turn the temperature control dial to the desired position between the middle and the hot position.
Ventilation
This mode directs outside air to the side and center vents.
1. Press thebutton to the off
position.
2. Press theair flow control
button.
3. Turn thefan speed control dial
to
the desired position.
4. Turn the temperature control dial to the desired position.
Defrosting or defogging
This mode directs the air to the defrost outlets to defrost/defog the windows.
1. Press the defrost/defog button.
2. Turn the
fan speed control dial to
the desired position.
3. Turn the temperature control dial to the desired position between the middle and the hot position.
- To quickly remove ice or fog from the windows,
turn the
fan speed control dial to the highest setting and the temperature control to the full HOT position.
- When the
position is selected, the air conditioner automatically turns on if the outside temperature is more than 36ºF (2ºC). This dehumidifies the air which helps defog the windshield. The
mode automatically turns off, allowing outside air to be drawn into the passenger compartment to further improve the defogging performance. The recirculation mode cannot be activated in the
position.
Bi-level heating
The bi-level mode directs warmed air to the side and center vents and to the front and rear floor outlets.
1. Press thebutton to the off
position.
2. Press theair flow control
button.
3. Turn thefan speed control dial
to
the desired position.
4. Turn the temperature control dial to the desired position.
Heating and defogging
This mode heats the interior and defogs the windshield.
1. Press the
air flow
control button.
2. Turn thefan speed control
dial to
the desired position.
3. Turn the temperature control dial to the desired position between the middle and the hot position.
- When the
position is selected, the air conditioner automatically turns on if the outside temperature is more than 36ºF (2ºC). This dehumidifies the air which helps defog the windshield. The
mode automatically turns off, allowing outside air to be drawn into the passenger compartment to further improve the defogging performance.
Operating tips
Clear snow and ice from the wiper blades and air inlet in front of the windshield.
This improves heater operation.