Originally Posted by roundrobin
Please let me know if you find a better brand thermostat switch. I did a lot of research in computer cooling with the same kind of fans. I found that blowing air out, helped, blowing air in helped more, and blowing air in and out worked the best. I am going to do some testing on this, as I have many of these fans left from inventory. If you want a great low noise 4 inch fan, go to a computer store and buy a ball bearring fan of high quality. Should cost about $15.
The techie guy should know. A great fan can stay on for years, running 24/7 without making hardly any noise, if mounted with screws at all 4 corners.
I haven't found a replacement for the thermistor/thermostat, but I did find information about the one in my AS on another forum. It's an Emerson switch.
The number on the outside of mine is: 36T22 561887 F40-15C S0750
is the form factor (meaning it's a surface mount OFF/ON switch,
normally OPEN (i.e. switch is normally OFF),
and will CLOSE (i.e. switch ON) when the temp rises;
561887 is Emerson's part number.
specifies it's a fan controller(i.e. F),
the 40-15C is the circuit CLOSE temp and temperature differential spec.
When the temp rises up to or over 40 Celsius (or 104 Fahrenheit) the circuit will CLOSE which allows the fan to run.
When the temp drops down to or below 25 Celsius (40 minus the 15c differential) (or 77 Fahrenheit) the switch will OPEN thereby cutting off power to the fan.
S1217 is Emerson's location code for place of manufacture. S1217 = made in China. Mine is a different code so I don't know where mine was made. But I've tried 2 of them in there now and they both run continuously. The second one worked for a while but now it does the same thing.
So more information, a little progress. I'll continue to look for a replacement. I did find a spare fan and the fan switch from the PO. So I got that goin' for me.