This has been happening every once in a while and it has me puzzled. If it does run then the problem may lie in the fan relay switch or the wiring. Jual Fan Case Kompute Thermaltake Pc Ring Plus 12 Rgb Radiator Fan 3 Pack - Jakarta Pusat - Sistem Komputer Tokopedia About the fan, i do want to bring to youre attention that there is a pressure swicth located on top of the dryer canister on the ac system. Radiator fan not working sometimes . Typical causes are seized valves, blockages, an imbalanced system, or the presence of air. Initially, the a/c started working intermittently and then often wouldn't work at all. I put a new coolant temp switch in it (aftermarket) and the condensor fan comes on when the car is hot and i turn it off but the radiator fan will only come on sometimes. I can hear the ac kick on when my car is warm and after i give it a couple revs. Look for corrosion and damage. My radiator fan does not kick in at the usual 108c, sometimes it only kicks in ...