furnace

I have 3 zones and the 2nd floor gets no heat, I bleed the lines and no water would come out. I filled the lines with a hose, still nothing. I added a Watts feed/pressure regulated and a few shark bites. There is no feeder in this furnace set up.

This is a fairly new Goodman forced air furnace. I replaced it in 2014 or end of 2013. All our bedrooms are upstairs where it gets pretty warm even when it's cold outside without heater. We hardly need any heat at night so I reduced it yesterday to 60. However, when I woke up, the temperature on...