Nissan Altima (L34) 2019-2024 Owners Manual: Air conditioner operation
Start the engine, turn thefan
speed
control dial to the desired position, and
press the
button to activate the air
conditioner. When the air conditioner is on,
cooling and dehumidifying functions are
added to the heater operation.
The air conditioner cooling function operates only when the engine is running.
Cooling
This mode is used to cool and dehumidify the air.
1. Press thebutton to the off
position.
2. Press theair flow control
button.
3. Turn thefan speed control dial
to
the desired position.
4. Press the A/C button. The indicator light comes on.
5. Turn the temperature control dial to the desired position.
- For quick cooling when the outside temperature
is high, press the
button to the ON position. Be sure to return the
to the off position for normal cooling.
MAX A/C may be used for quick cooling.
Dehumidified heating
This mode is used to heat and dehumidify the air.
1. Press the button to the off
position.
2. Press the air flow control
button.
3. Turn the fan speed control dial
to
the desired position.
4. Press the A/C (air conditioner) button.
The indicator light comes on.
5. Turn the temperature control dial to the desired position.
Dehumidified defogging
This mode is used to defog the windows and dehumidify the air.
1. Press theair flow control
button.
2. Turn the fan speed control dial
to
the desired position.
- When the
or
are 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.
3. Turn the temperature control dial to the desired position.
Operating tips
- Keep the windows closed while the air conditioner is in operation.
- After parking in the sun, drive for 2 or 3
minutes with the windows open to vent
hot air from the passenger compartment.
Then, close the windows. This allows the air conditioner to cool the interior more quickly.
- The air conditioning system should be operated for approximately 10 minutes at least once a month. This helps prevent damage to the system due to lack of lubrication.
- A visible mist may be seen coming from the ventilators in hot, humid conditions as the air is cooled rapidly. This does not indicate a malfunction.
- If the engine coolant temperature gauge indicates engine coolant temperature over the normal range, turn the air conditioner off. For additional information, see "If your vehicle overheats".
- When Remote Engine Start (if so equipped) is activated, the manual climate control system will default to the last used heating or cooling mode.
Air flow charts
The following charts show the button and
dial positions for MAXIMUM AND QUICK
heating, cooling or defrosting. Theair
recirculation button should always be in
the off position for heating and defrosting.