My 242Ti (manual) has been running hot while sitting in traffic with temps about 95F. The needle works its way just short of the red zone. The auxilliary fan (behind the gril, in front of the condensor) does not come on with or without the AC running. Where is the sensor that triggers the fan motor? I have checked the fuse and it is fine. Is there a relay that I can check? Are the fan motors prone to failure? BTW, the radiator and condensor is clean and clear of obstructions. Thanks!