Electric Fan Sending Unit Not Working

Grey wire is connected to the thermostat sending unit terminal with the blue ring crimp connector provided.

Electric fan sending unit not working.

The switch is designed to be on or off depending on the temp of the engine. Refer to your vehicle repair manual to locate wires components and modules if necessary. Feel around the sides of the blade guards for clips that are holding the 2 parts together. A toggle switch can be wired into the system to manually override the cycling of the fan.

If you re still not sure once you ve completed all the wiring let the. And off at 175 f. Listen for the relay clicking. 85 and 86 can be reversed and 30 and 87 can be reversed.

If it clicks get a voltmeter or test light and check for battery power at the fuse and relay yellow wire. In certain cases an electric fireplace s flame flickers and the fan blows but no heat is produced. Or on at 195 f. Assuming you have the typical 30 amp relay.

This problem occurs when the thermostat is set too low below room temperature preventing it from turning on. 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. 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.

Depending on the model the thermostat sending unit triggers the fan on at 185 f. If there are clips unhook them and remove the front half. The summit 890117 electric fan thermostat switch will not work with a gauge. Unit does not supply heat you may have to replace the heat switch.

At this time there is not a sender switch that can be programmed this way. Pull the fan s electrical cord out to keep it from turning on randomly while you re working on it. Unplug the fan and either unhook the blade guard or unscrew the pin. You would need two temp ports and two senders.

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. Disconnect the grey wire from the sending unit and touch it to ground with the key on engine not running. You want to the battery hooked up to terminal 30 the fan motor hot lead hooked up to terminal 87 and then a 12v switched ignition source to 85 and the temp switch hooked up to 86.