Fan Sensor

[Svtfreak]

Is there a reliable way to test the switch? Immersion in hearing water with continuity meter attached? Mine never has acted right and fan never came on right (I wired manual switch in when I built as a backup) and I want to fix it when I rebuild the motor this month. I'm thinking I need a lower temp one maybe (like linked above) and pipe dope instead of tape (Yeah I should have known better). It worked when I first setup but hasn't since.

[CraigS]

How well does the 185 deg switch work. I have avoided it because, since it turns off at 165-170, I thought it would always be on after the first fan start. Figuring the engine will never get to 165-170 w/ a 180 deg t-stat.

[FMJ]

Can't answer that just yet. After installing the sensor most of my time was spent in the driveway with a few trips around the block. Once the temp was up and it was cycling on and off I put it back in the garage. I'll be out this weekend and get a better handle on how it works.

-Fred