Please read and only answer if I have missed something. I replaced my relay after I saw there was no fan cycle with or without A/C on. Radiator temp went to normal when on the highway, but ran high in local traffic. Replacing the relay seemed to do the trick for a week or two. Now the fan is not coming on again. I can only assume the fan is somehow intermittant or going bad, OR I blew another relay. Anything I've missed? And I will check the 40amp relay fused, but it was fine the first time. I can't see where the temperature sensor would be involved, where ever it's located.