Michael, it might be handy if you posted all your code so we could see how the rest of it is meant to work - you need to use the [ CODE ] and [ / CODE ] (with out spaces inside the brackets) to make it clearer.

I use the following to read a DS18B20 temperature probe and display the temperature on an LCD. I then have the routine below to trigger a pin that drives a fan when the temperature exceeds a set value - you could always change the > for < to trigger the condition you want

Code:
'*******************************************************************************
'Get and display the temperature
GIE = 0                                 ' turn off interupts
owin DQ, 1, [],NoDevice                 ' pole 1 wire bus - if no responce then device not pressent
OWOUT DQ, 1, [$CC, $44]                 ' Start temperature conversion
OWOUT DQ, 1, [$CC, $BE]                 ' Read the temperature
OWIN DQ, 0, [temperature.LOWBYTE, temperature.HIGHBYTE]
GIE = 1                                 ' turn interupts back on
temperature = temperature */ 1600 
lcdout $FE,$D4+0,"TEMP ",dec(temperature / 100),$DF,"C"

'******************************************************************************* '
fan:'check to see if fan is needed
fantrigger=fanset
if (temperature / 100)> fantrigger then 
high portA.4
endif