Hmmm, well, its a dual stage controller. So I have the heater plugged into the chiller.
If the tank gets to 75, it'll kick the heater on, to keep the tank at 77. but overnight the tank stays around 78, so I dont think the heater ever comes on.
But, from sitting in front of the tank, with the chiller set to hold the tank at 77, it kicks on when the tank gets warmer then 79... but doesnt cool the tank all the way down to 77. Which is what I thought it would do. I originally set it to 79, hoping to keep the tank stable at 79 (it would get to 82ish during the day with MH's on), but the chiller wouldnt kick on till the tank was reaching 81... and so I wasnt really getting any temp reduction with it at 79. At 77, I keep it pretty stable at 79-80, like I wanted originally... so I am really not dissatisfied with the unit.
I just recently purchased and setup the unit (2 weeks?), and I have never had a chiller before. So I am not sure if this is how it is supposed to work or not, but this is how mine does.
Now I am gonna go read the instructions again... just in case I have done something wrong
