I recently installed a Gulf Stream GS-1000 Heat Pump on my 27 foot round pool. It seems to be everything that I hoped it would be and more. Very pleased with it. I was under the impression that the heat pump would cut off at outside air temperatures of just below 50 deg F. with some variability according to humidity I suppose. Not sure what causes the variability. Anyway the unit seems to remain in the on state while the temps are in the mid 40's to even the low 40's. I would have expected it to no come on till the outside temps reached at least 48 or so. Anyone think I should have concerns over this. Im thinking that maybe some switch sensor is not operating properly. I suppose that would also mean that the units self diagnostics are not working properly also since it is not giving me an error message either. Any insights into what I should expect in regards to this functionality would be greatly appreciated.