Hi! Last May I got a Trane XL16i heat pump installed and so far have been very happy with it. With it getting colder outside, I have noticed that it runs constantly if the temperature is down in the mid 20's or lower and wanted to see if that is normal when having the house set at 68 degrees. I have the Trane thermostat (the 802) with the outdoor temperature sensor. With having a thermometer at one of the vents, I can see that it switches from the first stage (With outside temperatures in the low 20's, I see upper 70's coming out of the vents) to second stage (With outside temperatures in the low 20's, I see mid to upper 80's coming out of the vents) occasionally. Then after several minutes in second stage, it kicks back down to first stage. I guess I would have expected it to stay in second stage as long as is needed and then have the air completely kick off once the desired temperature is reached (like my old heat pump did). If I raise the temperature a couple of degrees to kick on the auxillary heat banks, temperatures get above 100 quickly. But then after several minutes, the air kicks back to a lower stage instead of having the air kick off completely. Is what I am seeing normal operation with this heat pump? Thanks in advance for any responses!