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Discussion Starter #1
I have a 2008 beetle convertible , my ac stop working not cooling. When I turn ac on fan does not come on. When the car warms up fan comes on but not compressor ..... I check fuses on top of battery and all 3 are good not burn I pulled them out... I heard those are the ones to check... so friday I had a local shop do a diagnostic test they had it all day.. they told me that the compressor is bad that I need a new one at a cost of $1050.00...... so will a bad compressor cause the fan not to come on as well??? Anyone no?????
 

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Discussion Starter #5
Up date on my ac problem. Got in to the dealer this morning they called me about 12 noon and told me all looked good fuses module full charge in the ac. So they think its a short somewhere and they needed more time and said it would cost another $120 to continued the search !!!! I'm not happy.. will see what they say tomorrow.....
 

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Discussion Starter #9
Anyone know were the location of the axillary fan control relay module is on the 2008 beetle convertible???
 

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This is unique to the convertible. I attempted for 3 years to track down my AC issues. I finally found on the Ross-Tech forums there is a 4 wire connector near the starter that the wire loom had worn through two wires. One of those wires, if not both, went to the compressors solenoid gate valve. Repaired the wires and ice cold AC. To answer your question, the fan control solenoid on a single fan unit is built into the fan. Check the connector before you spend $300 on a new fan like I did.
 

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Discussion Starter #11
I did buy the the radiator fan Assembly with the module and nothing!!!!! I saw a video on YouTube that said that it took one of those relays under the battery tray nothing there ??? Now I am getting the cluster light come on that’s is hot but is not hot? I did get a code yesterday P0118 I cleared it and it didn’t show up anymore, if I pull off the coolant temperature switch the fan come on Full blast .
 

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Discussion Starter #13
2008 beetle convertible 2.5 automatic, I changed the coolant temperature sensor about 3 months ago and fan didn’t come on I changed the radiator fan Assembly and nothing? I watched a YouTube video on the fan control relay switch it has 2 plug on it it said it was under battery tray nope nothing they maybe is for different year? Pat number 1J0919506K....... ac has been a nightmare it hasn’t worked right since 2013!
 

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The code, is for the Engine Coolant Temperature Sensor (G62); which is different, then the coolant temp switch for the cooling fan.

Here are some links; to the service manual info, New Beetle Convertible L5-2.5L (BPR) (2007), I don't know, if they are exactly the same as your 2008 model:

location of G62 sensor location #6:

https://workshop-manuals.com/volksw...or_computer)/component_information/locations/

G62 sensor testing:

https://workshop-manuals.com/volksw...er)/component_information/diagrams/page_4280/

location of Coolant Fan Control (FC) Thermal Switch F18

https://workshop-manuals.com/volksw...ensor/switch/component_information/locations/

wiring diagrams:

https://workshop-manuals.com/volksw...iagrams/diagram_information_and_instructions/

What scan tool are you using? It would be nice, if you had VCDS by Ross Tech; you could possibly be looking at live data for the a/c system, some of the later compressors showed their "status", any proprietary vw control modules, like the hvac system, any vw factory trouble codes, that may not be readable by a generic obd II scan tool and possibly, do output tests, to turn on the fans and maybe, activate the compressor as well.

Some of the later compressors; had a issue with the external switch, that controlled the high/low side pressure, would fail as also.

RKX AC Compressor Control Solenoid Valve; check out some videos and parts for the sanden compressors. You would have to identify yours and see if this applies to you car but worth a look.

https://www.google.com/search?clien...Jetta+Sanden&sourceid=opera&ie=UTF-8&oe=UTF-8

I don't have a specific explanation for your problems but maybe, you can start investigating things with the above service manual links and if you can get a VW scan tool, any hvac trouble codes, might give you some clues, as to what is wrong?
 

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This looks to be a generic obd ii reader:

BAFX Products - WiFi OBD2 / OBDII Code Reader & Scanner for iOS Devices (iPhone, iPad) - Read & Clear Your Check Engine Light & So Much More! https://www.amazon.com/dp/B078K54MT5/ref=cm_sw_r_cp_api_i_A54vDbZXY914X

A vw specific scan tool; like vcds by ross tech, could give you more testing, scanning capabilities and access to the hvac system, which may help you diagnose the system easier.
 

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Discussion Starter #18
Today I replaced the coolant temperature sensor again, dash light not coming on but still no radiator fan or ac tomorrow I’ll keep testing what a pain this car has been with the electrical!!!!!
 

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Discussion Starter #20
Well checked harness didn’t fine anything so far, new parts I put in so far, radiator and radiator fan Assembly with module, coolant temperature sensor, AC pump solenoid switch , anything else I am missing? When I have ac on and when I checked the 2 wire ac pump solenoid plug I get nothing? Any clues
 
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