hi i have your 1/10 HP chiller. i set it to work when temp in my tank get to 79. for some reason it doesn't start to work automatically. the chiller shows 80F and even 81F and yet the chiller doesn't start up. any idea what's going on? i only have the chiller for about couple of weeks. i didn't notice the problem before because my temperature didn't get so high, but now i see that the only way to start it up is to set the temperature it should kick in to a lower temp and then raise it again to the desired one.