My carrier comfort zone ii doesn't seem to kick on heating our cooling cycles in auto it only does when I actually switch the mode over to one of those settings is this a bad tstat?

SOURCE: thermostat issue with comfort zone II.

Is this an electric or gass furnace - Eather of these can can have this problem its most recomendable that you call a seviceman .
in the case of electric furnace you may requier a new heat sequencer. And in the case of gass you may requier a new relay.

SOURCE: Carrier Comfort Zone ii - trying to find user manual

Your description leads me to believe you have 2 thermostats. How long have you lived in the house? Did it work for you lately? Sometimes its just the door switch. If you have to remove it to change the filter or had it off for another reason hold the switch in by hand and try it. then check the door for correct channeling in the grooves provided and see if this is it.

SOURCE: Carrier Comfort Zone 2 flashing E2

the e2 error on your thermostat is a problem with the return temp sensor on your system, the only thing you can really do is call a company and replace it, you can't bypass it or remove it cause the system wont run properly

SOURCE: Blank readings on Carrier Comfort 3 zone thermostat

The stat that works is called the main and the other two are called slave stats. The stats must be set to heat or cool the same as the main. If you want one room to cool and one to heat , sorry. Need to upgrade to auto changeover. Is this AC actally a Heat pump?

Wale Sarumi KomputerSolution

• 6993 Answers
• Posted on Sep 10, 2010

SOURCE: Comfort Zone carrier Unit:

Hello,

the answer is yes. It will work. They are almost the same thing with slight difference.

You can go ahead and replace the old interface with the new style thermostat.

I wish you good luck.