To select outside (fresh) air or recirculated air, press this button.
Recirculated air position
With the recirculated air selected, air from the passenger compartment is drawn through the climate control system.
Outside (fresh) air position
With the outside (fresh) air selected, air enters the vehicle from outside and is drawn through the climate control system.
Information
Using the system in the fresh air position is recommended.
Prolonged operation of the heater in the recirculated air position (without air conditioning selected) can cause fogging of the windshield and side windows and the air within the passenger compartment will become stale.
In addition, prolonged use of the air conditioning with the recirculated air position selected will result in excessively dry air in the passenger compartment.
WARNING
To prevent serious injury or death:
Hyundai Tucson (NX4) 2022-2025 Service Manual: Relay Box (Engine Compartment)
- Inspection
Power Relay (Type A)
1.There should be continuity between the No.30 and No.87 terminals
when power and ground are connected to the No.85 and No.86 terminals.
2.There should be no continuity between the No.30 and No.87 terminals when power is disconnected.[Engine room relay box]
...
Hyundai Tucson (NX4) 2022-2025 Service Manual: Compressor oil
- Oil Specification
1.The R-134a or R-1234yf system requires synthetic (PAG) compressor
oil whereas the R-12 system requires mineral compressor oil. The two
oils must never be mixed.
2.Compressor (PAG) oil varies according to compressor model. Be sure to use oil specified for the model of c ...