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I replaced the thermostat with a 180 degree high flow miloden that was referenced in some other thread. Put my old fan sensor "thermostatic switch" back in. After a couple of road tests it seems to be operating normally. Fan comes on when my temp gauge reads 220 degress. Didn't time the...

Not sure why it matters where I bought the fan sensor. There are 20 different places you can get them. Even thought I purchased from Oshkosh it was advertised as the correct replacement for the HMMWV as you can see in the pictures I posted. Not sure I will purchase from them again as they...

I checked the power steering fluid level, it’s good. If the Cadillac valve was sticking why can I manually turn fan off any time it’s running by flooring the accelerator and engaging the TDM? Turns off for 15-20 seconds then comes back on. I can also turn the fan off when running by bypassing...

Upper radiator hose is hot and has pressure in it. Put my original fan sensor back in with the same volatage monitoring setup. Fan off initially, power on both sides of sensor. When my temp gauge gets up just above 220 fan comes on and I see the voltage go away on one side of sensor. Fan...

I replaced the fan sensor and it does not appear to operate at the right temperature range

What I can't get past is that if bypass the fan switch and close/open the connection manually the fan works as it should. Here's some pictures of my test and the new fan sensor I purchased.

Based on the temperature gauge my fan used to cycle on about 220 and then off around 210. Then it started cycling on and off once then stayed on all the time. Based on my troubleshooting it appeared that the fan sensor on the water bridge was not working properly. When cold fan was off...