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[quote=”skim3544″ post=186692]I remember working on these cars, the manual says to put the car in service position but I was able to do it just by sliding the fan assembly out from the bottom. Fan and fan thermo switches are first to be checked/replaced. I did the same test by jumping the connections using paper clip to test the fans. If you are still having problem after, I would
1) check the fuse (dark brown color?) When fan burns out it is common for these fuse to burn out.
2) replace the fan control module.It is really common for these 3 to burn out at the same time for VW. That is nature of the beast. Bad fan thermo switch (I believe this is connected A/C system) usually burn out the fan control module (this is usually located behind the bumper)[/quote]
[quote=”skim3544″ post=186694]Needless to say, you want to install quality fan thermo switch. A faulty fan thermo switch can burn out new fan control module after the installation. You can get into money pit loop of these three items (fan switch, fuse, fan control module) frying each other out. I normally use good name brand aftermarket thermo switch – this should run you least $20. [/quote]
The thermo fan switch is mounted right on the radiator, there is an a/c cutout switch that turns on the high speed fans when you turn on the a/c. I did pull 2 fan control modules from the salvage yard from supposed running engines, which is right below the coolant tank, bad location if you ask me. I understand that its a gamble, but at $10 for both I figured its worth it as I’ve wasted more money on less important things. My issue, well one of my issues was the switches I purchased from Advanced Auto. The first one seemed no different than my original one, as mentioned on my OP, I bought 3, I tested the others off the car in boiling water and non would close the low or high speed circuit. I went this route because I wanted to eliminate any other vehicle electrical issues that may be present. The 4th one I bought from Autozone, that one had temp specs on the bottom of the switch element unlike the others and it closed the circuit as it should. I installed it, but I was mistaken about which circuit worked when jumped from the terminal. High speed works, but low does not. I tested voltage on the fan harness looking for 12v when I jumped low speed. 12v was present, but the the fan did not run. My assumption is there is 2 circuits internally that operate independently of each other within the fan motor since high works and low does not. I’ll be looking into replacing the motor shortly. I ran the vehicle Fri, Sat and Sun all while keeping an eye on the temp (BT OBD2 adapter and Torque app is a beautiful thing). according to the app, temp would float between 197.6 and 201. From what I’ve found elsewhere on the interwebs, the low speed fan kicks on @198-207 and high speed @ 210-221. Since my temp is sitting at the temp where the low speed fan should kick on, I need to get that resolved to bring the temp down. 197.6 – 201 isnt bad but I’d like to stay lower as its not even hot out, I’m sure it will only get worse as ambient temps rise. Appreciate all the replies. Sometimes its nice just to get confirmation of a thought process.