No the sensor will not run a thermo fan, you may be able to put a sensor in there that does, but I don't know about that. The 3tgteu never had a thermo fan. The thermo time switch I talk about is not what you need, as this switches when the engine is warm you want something that switches when hot ie + 90 deg. If you have the standard fan setup why not run that? I personally like mechanical fans less to F#%$ up than thermo fans. But just my opinion. You can get after market kits for a resonable price. Are you running haltech surely it sensors the water temperature, don't you have auxillary outputs? why not switch one of these on at 90 deg or so and theres your switch.