Lately i have been in the process of trying to fix my non-working A/C system in my TDI. After researching it and narrowing it down to the solenoid or the fan assembly. I went ahead a swamped the solenoid within my compressor, as so many people suggested. My A/C still does not work. It works when my car is running down the highway, having airflow through my front end. I know now it is my Front AC fan assembly that is not working correctly, BUT after running into major traffic jam. I sat idling for multiple minutes. Painfully inching along the highway. After several miles, my eye caught my temp gauge showing above average temp. After several minutes my gauge continued to climb. After growing extremely hot, i was able to start moving again, luckily in traffic to get some airflow in my car. Dropping the temp back to normal in a matter of 2 minutes. I now realize. BOTH my fans are out, in my TDI. I have read on other posts that the fan assembly are tied together, which would make sense for my case. My question, is there any good way to test Fan assembly? Instead of spending 200-150 on new fan assembly. I have read it can also be the Fan control Module (FCM). I want to diagnose which component is shot before i buy the wrong one. Which i have done, so many times.