Most people use a thermostat for sub~zero TEC use don't they?, from what I've read...
I was going to use an on/off flow sensor on my KX7 but the 'CPU Fan Fail shutdown' option in the BIOS is broken!

, it's not just my mobo either. Bladerunner's(who's idea it was to use it) KX7 will boot without a fan on the header with the option selected and won't shutdown if fan is stopped or header plug pulled while running in windows. mine
wont boot if the headers empty, but once it's running in W98 you can stop the fan or pull the header out and it still won't shut down. you can use MBM5 but the Abit hardware method would be best...
BB2K how would you utilise the flow sensor to shutdown the PC?, MBM5 or such?, can you think of a hardware method?, maybe a curcuit breaker to cut PC power on a delay/timer?(to allow time for pump to start), is such a curcuit possible to make at home you think?...