1996 vw mkIII gti aba 2.0 ac not cooling.

Question edited for clarity.

In the link. The VW Vortex Forums are a great resource.

https://www.google.com/search?q=1998+VW+Golf+2.0+GTI+with+ABA+engine.+Vacuum+hose+routing+diagram

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does the temp gauge reach the red area? check eng coolant .Over heating could cause eng to cut out so as not to cause more damage check the cooling system.When travelling slowly or at stand still turn heater to max heat and max speed this will cool eng but is only a temporary solution

I have discussed this with you and have advised you that you need to see dealer assistance on this.

Hello! A thermometer light with two wavy lines underneath the thermometer indicates a problem with the VW's cooling system...When the engine is cold; Check the coolant level in the radiator...If it is full and since the light goes out when the engine reaches normal operating temperature the Low Coolant Level sensor is defective...But I suspect the level is low..
Guru...............saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

1993-2005 Volkswagen Jetta, Golf, GTI, Cabrio (A3-A4) Hatchback & Sedan Workshop Repair Service Manual - 350MB PDF

1993 2005 Volkswagen Jetta Golf GTI Cabrio A3 A4 Hatchback Sedan...

This is a COMPLETE Service and Repair Manual for your 1993 1994 1955 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 VW Jetta, Golf, GTI, Cabrio (1.8L turbo, 1.9L TDI and PD diesel 2.0L gasoline, 2.8 LVR6) (A3, A4 Platform) Hatchback & Sedan. It covers every single detail. All models, and all engines are included.

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1993 1994 1955 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 VW Jetta, Golf, GTI, Cabrio (1.8L turbo, 1.9L TDI and PD diesel 2.0L gasoline, 2.8 LVR6) (A3, A4 Platform) Hatchback & Sedan
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TABLE OF CONTENT (example)

GENERAL INFORMATION *

ENGINE *
engine mechanical
engine lubrication system
engine cooling system
engine control system
fuel system
exhaust system

TRANSMISSION/TRANSAXLE *
clutch
manual transaxle
automatic transaxle

DRIVELINE/AXLE *
front axle
rear axle

SUSPENSION *
front suspension
rear suspension
road wheels & tyres

BRAKES *
brake system
parking brake system
brake control system

STEERING *
power steering system
steering system

RESTRAINTS *
seat belts
supplemental restraint system (srs)

BODY *
body, lock & security system
glasses, window system & mirrors
roof
exterior & Interior
Instrumental panel
seat

AIR CONDITIONER *
air conditioner system

ELECTRICAL *
wiring diagrams
starting & charging system
lighting system
driver information system
wiper, washer & horn
body control system
lan system
audio visual, navigation & telephone system
auto cruise control system
power supply, ground & circuit elements

MAINTENANCE *
maintenance

INDEX *
alphabetical Index

1993 1994 1955 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 VW Jetta, Golf, GTI, Cabrio (1.8L turbo, 1.9L TDI and PD diesel 2.0L gasoline, 2.8 LVR6) (A3, A4 Platform) Hatchback & Sedan

check all fuses first. does ac compressor come on? if not, unplug pressure switch in low pressure line near where you add freon and short across pigtail. comes on now and cools? replace switch. if not plug back in. apply manual voltage to ac compressor. comes on and cools? if not compressor or clutch is bad. if it does, check ac relay. that's about all you can do with limited tools in the driveway. if no progress has been made, time to take it to the pros.

Maybe there is a restriction where the r134a refrigerant flows. Or, the refrigerant is low on charge and shuts the compressor off due to this.

Good luck to you.

Check cooling fans not faulty - run freely.
Check the operation of the cooling fan control relay.
Replace relay, and observe if this fixes the problem.

chech realey and water senso tem.

switch prolly not bad but you might wanna look into your heater control valve. valve not closing and letting the hot coolant fill your heat exchanger rather than recycling it back to the cooling system. The heat is over powering your a/c system and you're only getting a bit of cooling when you have the a/c on max. try it out