Electric Fan Sending Unit Not Working

Depending on the model the thermostat sending unit triggers the fan on at 185 f.

Electric fan sending unit not working.

A toggle switch can be wired into the system to manually override the cycling of the fan. At this time there is not a sender switch that can be programmed this way. The summit 890117 electric fan thermostat switch will not work with a gauge. If it clicks get a voltmeter or test light and check for battery power at the fuse and relay yellow wire.

Feel around the sides of the blade guards for clips that are holding the 2 parts together. If there are clips unhook them and remove the front half. Unplug the fan and either unhook the blade guard or unscrew the pin. This problem occurs when the thermostat is set too low below room temperature preventing it from turning on.

Disconnect the grey wire from the sending unit and touch it to ground with the key on engine not running. The switch is designed to be on or off depending on the temp of the engine. You would need two temp ports and two senders. Grey wire is connected to the thermostat sending unit terminal with the blue ring crimp connector provided.

Assuming you have the typical 30 amp relay. Refer to your vehicle repair manual to locate wires components and modules if necessary. Fan switches replacement electric fan thermostats sending unit only thread in 165 degrees f off temperature 180 degrees f on temperature each 7 part number. If you re still not sure once you ve completed all the wiring let the.

If you are unsure which wire is which coming out of the electric fan find the fan manufacturer s supplied wiring diagram. Or on at 195 f. And off at 175 f. Pull the fan s electrical cord out to keep it from turning on randomly while you re working on it.

And off at 165 f. If the fan runs the sending unit is bad or not getting a ground too much teflon tape if it doesn t run. Still in some cases you need to make a diagnosis using a professional scan tool to check for voltage values and power inputs to the cooling fan to locate the source of the problem. Listen for the relay clicking.

The temperature probe should be plugged into the system where the coolant is hottest generally the thermostat housing in the coolant passages adjacent to it or in the water jacket of the. Unit does not supply heat you may have to replace the heat switch. In certain cases an electric fireplace s flame flickers and the fan blows but no heat is produced.