Hummer Guy
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Today I decided to power wash the radiator since I never cleaned it good since I got it & have yet to install my new aluminum one, I also washed the engine down as well, after that I went to drive it back and I notice about 4 miles later, the temp gauge was showing at almost 240 and the fan didn't come on so I pulled over to the side and unplug the fan switch so it can automatically come on, after that, I drove around the parking lot until it reached 200 then I plugged it back in and the fan came on as normal around 220. What was the cause of the fan not coming on around 240 since I power washed it? Take note I been daily driving this humvee for months and this was the first time the fan didn't come on at 220 and let it keep rising. Another thing to mention, I did bump the accelerator pedal on accident when I was reaching over inside to get a towel. Could this have caused it to go in deep water fording mode and completely cut the fan off the whole time?