I get the error code E2 It only shows 2 zones on my 4 zone syst

Question edited for clarity and spelling.

Disconnect from the mains supply for an hour and then fully reprogram.

https://www.google.com/search?q=Comfort+II+thermostat+changes+all+the+zones+to+%22out%22

COMFORT ZONE II - E. Smith Heating & Air Conditioning

https://esmithair.com > uploads > 2015/03 > Comf...
PDF
From the normal operation mode, press the Hold, Out, and All Zone buttons in that order to program all zones to an unoccupied status. Until you return, the air ...
24 pages

..

likely need to "enable zoning" in setup menu.

Hi Anonymous,
For all wall mounted and Artcool split system codes

Error code = C1 or CH1
Flashing Light = 1
Fault = Indoor temperature sensor open or closedcircuit.
Display = Indoor.
Indoor Operation = ON

Error code = C2 or CH2
Flashing Light = 2
Fault = Outdoor temperature sensor open orclosed circuit.
Display = Indoor Outdoor.
Indoor Operation = ON

Sounds to me like a bad damper or a bad zone panel. Turn tstat off and call for cooling on zone 2. Then see if your still getting cool air to zone 1.( where the main tstat is)

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Everytime I turn on the CZ heater, the display reads A05 and then it goes away when i set the temp. As far as I can see and feel, I'm not experiencing any issues with the heating, fan, or thermostat or the extension cord running hot. I'm concerned that something could be wrong or unsafe, with Comfort Zone filing for Chapter 7, anyone know who is offering support or a number I can contact?

This .pdf file may be of help to you:
www.brivis.com.au/.../Carrier%20Comfort%20Zone%20II%20Owner's%20Guide.pdf
Perhaps you could get some help from Carrier Support here:
http://www.residential.carrier.com/support/index.shtml
I noticed they have an option of talking to an engineer, and perhaps they could explain how to reset or set the unit.
Hope this helps.

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

Leaving air temperature sensor lockout. If the duct temp is normal, the sensor is probably faulty and will require replacement.

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.

the e2 code on a carrier comfort zone thermostat is indicitive of the external safety sensors which are located on your units ductwork in the attic. the e2 code are the hpt/ and lat sensor codes. the hpt is the heat pump temperature sensor and the lat is the leaving air temperature sensor. you can pull off the cover of the panel and behind it will actually give you all the fault codes associated with you carrier tsat.each sensor has a certain ohm rating and if its out of the range it will fail. now as to the reasons for failure, the indoor coil could be dirty, filters dirty, refrigerant charge incorrect.