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.

Pull the fan s electrical cord out to keep it from turning on randomly while you re working on it. If it clicks get a voltmeter or test light and check for battery power at the fuse and relay yellow wire. If the fan runs the sending unit is bad or not getting a ground too much teflon tape if it doesn t run. Assuming you have the typical 30 amp relay.

If there are clips unhook them and remove the front half. 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. At this time there is not a sender switch that can be programmed this way. Summit racing answer february 25 2019.

Disconnect the grey wire from the sending unit and touch it to ground with the key on engine not running. Feel around the sides of the blade guards for clips that are holding the 2 parts together. And off at 175 f. Listen for the relay clicking.

If you are unsure which wire is which coming out of the electric fan find the fan manufacturer s supplied wiring diagram. 85 and 86 can be reversed and 30 and 87 can be reversed. You would need two temp ports and two senders. Unit does not supply heat you may have to replace the heat switch.

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. And off at 165 f. This problem occurs when the thermostat is set too low below room temperature preventing it from turning on. Refer to your vehicle repair manual to locate wires components and modules if necessary.

The summit 890117 electric fan thermostat switch will not work with a gauge. Unplug the fan and either unhook the blade guard or unscrew the pin. If you re still not sure once you ve completed all the wiring let the. The switch is designed to be on or off depending on the temp of the engine.

In certain cases an electric fireplace s flame flickers and the fan blows but no heat is produced. A toggle switch can be wired into the system to manually override the cycling of the fan. Grey wire is connected to the thermostat sending unit terminal with the blue ring crimp connector provided.