Hello, it has been a while since I have been on here but I need help from the community. I see many threads on faulty clutch fans but I cannot find one that fits my problem. I have had my TB since new in 03 (225k miles) and this is my 3rd fan clutch. All repairs on vehicle to date done by me (okay my brother helps Symptoms = Clutch locked on at engine start and releases after about 1/4 mile. After much stop and go, engine will begin to run hot but has not overheated yet. Sometimes fan clutch will engage at a light and I can see temp dropping. Sometimes it won't and AC starts to malfunction while temperature goes over 210. Current fan clutch is new after market from Amazon but did not solve the problem. Replaced engine coolant temp sensor in case that was sending bad info. That did not fix the problem. I have a good digital multi-meter but without specific testing instructions, I am not great at troubleshooting. I don't think it is the fan clutch since the old one and new one were doing the same thing (barring a bad part). It seems the fan is either fully engaged or not at all but is NOT locked all the time. Could there be an AC sensor giving bad information? Any help with troubleshooting is appreciated.