American Volt Electric Fan Push-in Radiator Fin Brass Probe Thermostat Temperature Switch Sensor Kit (2-Pack, 200'F On - 185'F Off)

I installed thermostat in radiator of 69 ford the engine gets so hot the starter will not crank engine until engine cools. The thermostat is supposed to activate auxiliary fan. The thermostat activated the fan the first 3 times and ran the fan for a few minutes. Now after a few uses the fan would only come on briefly. If thermostat turns on at 180 then shuts off at 165 then it is not functioning properly if it turns on briefly. How can my engine cool in a half second.

Very easy to install by shoving into radiator fins, and they work great. I have two of them hooked up in parallel for redundancy, to make sure the fans still turn on even if one of these switches goes bad, and to measure the temperature in different parts of the radiator. Worked perfectly on first install, and they've been doing great for a few weeks now.

Works perfectly just I am having a problem getting them to stay put

Ok but not what i expected. They do not last long. Okay as a temporary fix.

Ok fit--

Works

Temps will vary inside your transmission. Highest temp will be in the torque converter, just as the fluid is exiting at the cooling line. As fluid reduces temperature, it goes back to your pan. The coolest temperature is at the bottom of your pan. A ScanGauge will monitor the sensor inside of the transmission where the temperature is a mixture of the cold temperature at the bottom of your pan where the filter neck picks up fluid, and the high heat in the torque converter and valve body.Ideally, your OEM cooling system will reduce the temperature. In some instances, you will want to add a pan with increased fluid capacity, and an auxiliary cooler with as fan. The B&M cooler has a fan, and a thermostat switch set for 180 degrees Fahrenheit. I wanted to modify the fan to turn on at 140 degree Fahrenheit.This switch's 1/2" NPT thread did not fit in place of B&M's sensor. I used the sensor with a fin probe. Fluid passes through the cooler's plates, and heat is dissipated by the fins. Temperature taken at the fins is not as accurate, but I had to make this mod work. So in theory, the fins have to be 140 degree. The fluid inside of the cooler is higher than fin temperature. It will still turn on the fan and cool the fluid. If fluid leaving the OEM cooling system is still 180 degrees, then the transmission is in major trouble.Monitor your fluid temperature. Change the transmission fluid as needed. Use only the OEM spec fluid. Not multivehicle ATF.