The aux fan doesn't come on at all, period. The temp used to stay at 80C, now it seems to be very erratic--between 90-100 under the same conditions (on the freeway). But as soon as I get into traffic or in the city, the temp immediately starts to climb. If I stop at a light, it climbs and I don't have to sit there for very long, within 5 minutes. I just bought a new fan clutch and had it put on, but there are no changes at all. Do you know if anyone will test the switches to make sure they are faulty before I spend the money to replace it. But the fan switch sounds like the next solution. I'm there. Thanks