I put a new one because the other one was dated. I had changed around the supplies and added a couple more to the space and replaced all the diffusors. So after doing all that work, why not change the thermostat while I am at it. The honeywell needed to be calibrated so I put it to the setting where its suppose to be. Everything else as far as the 2 stage settings seem to look ok. Pushing in the contactor at the unit for the second condenser and it kicks on and works fine. I waited some time b4 checking the unit again and the second stage is running. So my theory is that the second stage is not kicking in for quite some time and by that time it is too late especially when it is very humid.
If you open the box there is a booklet showing you the different types of systems that the thermostat has to be set to and they show you exactly how to calibrate it. Not only does it show you that but also about 10 more calibration functions that they reccomend it be set to. No wires visible are broken, this is one of the common sense things that were checked first before I started to scratch my head on this subject.
So cal. Is just setting up the stat for your system. I noticed in one of your comments you said that the second stage came on but then shut off. Why did it shut off, did the stat shut it off or do your have an issue at the unit.
I put a new one because the other one was dated. I had changed around the supplies and added a couple more to the space and replaced all the diffusors. So after doing all that work, why not change the thermostat while I am at it.
If the system worked well before this work, this is a clue.
Some change you made is the cause.
It could be the ductwork. For example, I HAVE seen systems where a supply was inadvertently connected to a return, creating a loop that prevented the space from being cooled, yet caused tripping of a freeze stat on the evap.
It could be the thermostat. If you are mistaking installer setup for a calibration, you may not be familiar with the 6000. This too could be the problem.
If you put the old stat back on, this may lead you to one of those "aha" moments.
[Avatar photo from a Florida training accident. Everyone walked away.] 2 Tim 3:16-17
There is no mistaling the return for the supplies or vise versa. There is one main return in the middle of the space. I threw the old thermostat out so it looks like I am going to have to find another thermostat that is less involved.