SEAT Workshop Service and Repair Manuals

Air conditioning and heating: engine bay

Caution Disconnect battery earth strap before working on the electrical system.

t	Before disconnecting the battery check anti-theft coding on the radio

t	If the battery is reconnected check the vehicle equipment (radio, clock, electric comfort system, etc.) following the indications in the Workshop Manual and/or the Operating Instructions

t	Parts marked with an asterisk (*) must only be repaired in a Specialised Official Garage, since the coolant agent has to be removed with the unit -SAT 4006B-

1 -	Suction and filling valve*

q	Low pressure side

2 -	Expansion valve*

q	The path should be hermetically sealed against splashing water

3 -	Dust and pollen filter

q	Below the plenum chamber cover

q	Removal → Chapter, Dust and pollen filter: removing and installing

4 -	Outside temperature switch -F38-

q	Removal → Fig.

q	Disconnect the magnetic coupling -N25- for too low outside temperatures (disconnect at 2 °C, connect at 7 °C)

q	Clipped in the middle of the plenum chamber

5 -	Plug heat exchanger hoses

6 -	Plenum chamber cover

q	Removal and installation → Chapter

7 -	Vacuum hose

q	Connection plan for vacuum hoses → Chapter

8 -	Coolant temperature sender -G62-

q	In the thermostat

q	-G62- disconnect the magnetic coupling -N25- for too high temperatures of the coolant (disconnect at 119 °C, connect at 112 °C)

9 -	Two way valve for fresh air and air recirculation flap -N63-

q	With the created pressure and the existing vacuum, the depressor closes the flap

q	When the pressure is not created or the vacuum existant, the depressor opens the flap

q	Connection plan for vacuum hoses → Chapter

q	Removal and installation → Fig.

10 -	Vacuum tank

q	Below the battery retainer

q	Introduction depth of the vacuum hose: 30 mm

q	Installation and removal → Fig.

q	Only for vehicles with petrol engine

11 -	Radiator fan control unit -J293-

12 -	Condenser*

13 -	Pressure relief valve*

q	Check → Fig.

14 -	Magnetic coupling -N25-*

q	Manufacturer Sanden

q	Magnetic coupling -N25-: repair → Chapter

15 -	Pressure sender -G65- or air conditioning pressure switch -F129-

q	Removal → Fig.

q

8 Nm

q	Substitute the O-gasket (observe the spare part number)

q	The pressure sender and the pressure switch can be replaced without having to extract the coolant agent of the circuit

q	The pressure sender -G65- sends information to the radiator fan control unit -J293- and the engine control unit

q	Test the air conditioning pressure sender -G65- → Chapter

q	Check the air conditioning pressure switch -F129- → Chapter

Function:

t	Disconnects the air conditioning if the pressure is too low (e.g. in the case of coolant agent leak)

t	Changes the coolant agent radiator fan -V7- to the next higher speed in case of pressure increase in the coolant agent circuit

t	Disconnects the air conditioning if the pressure is too low (e.g. in the case of coolant agent leak)

16 -	Drier liquid tank*

17 -	Suction and filling valve*

q	High pressure side

18 -	Draining valve

q	Removal and installation → Fig.

q	Lip valve cannot be sticked with underbody protection product

Checking draining valve –  Remove the draining valve -2- from the bulkhead -4-. To guarantee proper functioning of the draining valve carry out the following checks: t  Combi-valve must be closed t  The heat insulator should not be deformed, or present imperfections on the draining valve zone

Removal of the pressure sender -G65- –  Remove the connector -1-. –  Unscrew the pressure sender -2-. –  Replace the gasket.

Removal of the outside temperature switch -F38- –  Separate the connector -1-. –  Remove the outside temperature switch -3- from its support -2-.

Checking the compressor pressure relief valve t  Function: protects the coolant circuit from too high pressures t  The pressure relief valve indicates if the valve had been opened. In this case a sticker is expelled -arrow- t  In this case the vehicle must be brought to a Specialized Official Garage

Removal and installing of the two way valve for fresh air and air recirculation trapdoor -N63- 1 -  Cover Test the permeable slot in the open air 2 -  Two way valve (other manufacturer shapes are possible) 3 -  Vacuum hose towards the depressant for fresh air flap and air recirculation 4 -  Depression hose towards the tank and the engine –  Unlock the two way valve -arrow- and pull downwards.

Removal and installation of the vacuum reservoir