Engine Bay Fan Check

Hello
Last year I fitted a new engine bay fan because the old one looked like it was about to fall apart with corrosion.
After that, it was very common to notice the fan cut in and out when driving around town - Summer or Winter.
But now, I never hear the fan start.
Can I check its functionality using PSCAN?

Surely you can check it by disconnecting it from the sensor situated above and forward of the expansion tank, when disconnected it should run.

That depends on which car Bill has; Mk1 f definitely, I’m unsure of Mk2 but not Pektron tfs.
M

Airportable wrote:

That depends on which car Bill has; Mk1 f definitely, I’m unsure of Mk2 but not Pektron tfs.
M


David Aiketgate replied:-
The mk2 F still has the temp sensor north of the expansion tank. I believe the first TFs, with the square lucas fob, also retained that sensor. 

 

which ECU is this?

David Aiketgate wrote:

Airportable wrote:

That depends on which car Bill has; Mk1 f definitely, I’m unsure of Mk2 but not Pektron tfs.
M


David Aiketgate replied:-
The mk2 F still has the temp sensor north of the expansion tank. I believe the first TFs, with the square lucas fob, also retained that sensor. 

I can confirm that Early, Lucas FOB TFs also have this switch where you show it, and it does cause the engine-bay fan to come on once disconnected.  At least, it does on my 2002 TF.

Happy Christmas guys and thanks for the answers. My car is an LE500. My understanding is that this car and all later TFs don't have a sensor, but use the ECU (which probably has an internal temperature sensor). I haven't checked to see if the connector has dropped off, but I recall seeing a comment that you can check the fan operation using the diagnostics kit - is this correct?