Searched everywhere (ETIS, etc) but can't find it. Does anybody know when the electric diesel preheater, located in the fuelfilter, of a 1.4 TDCI kicks in and shuts off? And does it have a sensor in the element or does it get it's temp reading from the seperate fuel temp sensor on the other side of the engine?

Fuelfilter (B is the heater):

Heater element itself:

I'm just curious because it's just such a small electric heater, it can't be heating it very much.

I did find info on an older model electric preheater, from a Peugeot (but the 1.4 TDCI is essentually a Peugeot/Citroen engine, PSA group) and that heats the diesel barely.

It activates at -2 (+/- 2 degrees), it shuts off at +3 (+/- 2 degrees). All temps in Celsius. And that's a 150 W heater, don't know how the inside of the old heater looks but i guess the heating element is bigger then the thiny one in the fuelfilter.

So if anybody knows, or knows where to find that info, i would be very gratefull ;) .

To answer my own question, on a 1.4TDCI the on/off temp is +5 degrees Celsius according to Ford.