Yes, it is a thermo switch so should be open until the set point is reached.
If the fan runs when you bridge the thermo it means it is either shagged (bad) or the coolant isn't hot enough (good).
If the coolant isn't getting that hot it means the engine is "riding the thermostat" IE the thermostat is only partially open and still restricting flow to keep the engine in the operating range and stop it cooling off.
There is no point running the fans if the radiator is efficient enough in exchanging heat without the need for extra air flow and the thermostat doesn't need all the available coolant flow.
You will defeat the purpose of your fitment IE electrical fans still draw power and use fuel to run them so running them for no reason is counter productive.
If your fan clutch is in good condition the engine driven fan uses very little power anyway so changing to elec won't make a terrible lot of difference anyhow.
The engine driven fan only starts to use noticeable fuel and power when the fan clutch locks up.
Reply With Quote