Heating, air conditioning and ventilation Hyundai Sonata 4

Safety precautions and features of maintenance and repair
Air conditioning system operation diagram. General safety precautions 1. Refrigerant R-134a is a transparent, colorless substance, both in liquid and gaseous phases,...

Troubleshooting
Before replacing or repairing air conditioning system components, make sure there is a malfunction and check what it may be related to (refrigerant, air flow,...

Basic checks and adjustments — connecting the measuring manifold
Caution: Observe safety precautions when connecting the measuring manifold. 1. Close both valves of the measuring manifold fittings. 2. Connect the filling hoses to the...

Pumping out refrigerant from the air conditioning system
1. Connect the hoses of the measuring manifold to the service fittings of the vehicle's air conditioning system. 2. Place a clean rag under the open end of the center...

Vacuuming the system
Note: The air conditioning system must be evacuated every time it is depressurized. Vacuuming removes air and moisture that may have entered the system components. After...

Preparing a refrigerant cylinder for the system filling procedure
1. Before installing the tap on the cylinder, turn its handle counterclockwise until it stops. 2. Set the tap lock nut to the upper position by turning it...

Filling the air conditioning system with refrigerant (in gaseous state)
Note: This procedure charges the air conditioning system with refrigerant in the gaseous phase through the low pressure service port. Only installing the cylinder in a...

Filling the air conditioning system with refrigerant (in liquid state)
Note: This procedure charges the air conditioning system with refrigerant in the liquid phase through the high-pressure service port. The refrigerant cylinder in this...

Checking the efficiency of the air conditioner
1. Connect the measuring manifold to the system. 2. Start the engine and set the operating mode to 2000 rpm. Turn on the air conditioner, move the temperature control...

Locating refrigerant leaks
Note: This check is performed if a refrigerant leak is suspected or if work has been performed involving the removal of components or loosening of connections in...

Procedure for returning compressor oil to the compressor
The oil used to lubricate the compressor circulates throughout the air conditioning system only when the compressor is running. To check the amount of compressor oil or...

Checking the amount and adding compressor oil to the system
Note: Before adding compressor oil to the compressor, it is necessary to check the amount of compressor oil inside it. When replacing any system component or when...

Checking the system using a measuring manifold
Verification procedure 1. Connect the measuring manifold to the air conditioning system. 2. Check the system status under the following conditions: a) Air temperature at...

Air conditioning system piping
Removing air conditioning system pipes. 1 - evaporator and heater unit assembly, 2 - drain hose, 3 - expansion valve, 4 - expansion valve mounting bolt "A", 5 -...

Compressor and electromagnetic clutch
Removal and installation the compressor Removing the compressor. 1 - compressor, 2 - compressor mounting bracket (engines G4JP and G4JS), 3 - bolt. 1. Remove the battery...

Condenser fan, motor relay, receiver-dryer and triple refrigerant pressure switch
Removing the condenser electric fan. 1 - condenser, 2 - radiator, 3 - radiator electric fan, 4 - condenser electric fan. Checking the capacitor 1. Check the condenser...

Manual air conditioner
Control panel for manual air conditioner. 1 - heater electric fan switch (electric fan speed control), 2 - air flow direction selection switches (air flow control), 3 -...

Automatic air conditioning
Control panel for air conditioner with automatic control and connectors of the air conditioner control unit. 1 - heater fan mode switch, 2 - automatic control switch, 3...

Heater — disassembly, inspection and assembly
Disassembling the heater. 1 - upper part of heater housing, 2 - ventilation mode flap, 3 - ventilation mode flap lever, 4 - windshield heating flap, 5 - windshield...

Electric heater fan
Disassembling the heater electric fan unit. 1 - upper part of the evaporator housing, 2 - upper part of the evaporator casing, 3 - resistor (air conditioner with manual...

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