I agree with jimmiblue, but Iwouldn't go with the rating of the thermostat: the value usually sucks. Also the temperature you see using Atap is not the same as what the PCM will use to command the fans (dunno why...) Better you put a lamp or a voltmeter in parallel to one fan to see when it turns on and off.
Thermostat: the aftermarket style has a slow warm up, it leaks somehow and in winter it's a pain.
I ended up modifying the stock one: I drilled an hole and tap a M4 thread right in the middle of the seat. It's adjustable! From the outside you can change the lenght of a bolt to adjust the temperature