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I have a Carrier Comfort Zone II with 2 controlled zones. The floor with just the sensor controls perfectly. I set that zone at 75 and it stays at 75. The other zone has the actual thermostat. If I se

I have a Carrier Comfort Zone II with 2 controlled zones. The floor with just the sensor controls perfectly. I set that zone at 75 and it stays at 75. The other zone has the actual thermostat. If I set that temperature at 75, it cools to 68 before the unit shuts down. If I raise the set point all the way up to 90, the temperature holds at 73. Do I have a bad thermostat or is there another solution?

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  • 2,410 Answers

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

Posted on Jul 15, 2017

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Posted on Jan 02, 2017

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SOURCE: Carrier Comfort Zone II Smart Control in one zone

sounds like your zone control tstat needs calabrated or maybe replaced,in owners manual there should be a section on calibration if not you may have to replace it

Posted on Sep 15, 2009

  • 22 Answers

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?

Posted on May 06, 2010

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2 Answers

In the cooling mode for zone 1, why won't the temperature stay as set on the cool setting?


If it 2 degree cooler then that's fine .adjust your thermostat 2 degrees higher so you will get the temperature

Feb 16, 2018 | Carrier Heating & Cooling

1 Answer

Carrier Comfort Zone II Thermostat is blank and the 3 companion thermostats are all showing Error Code C1. What does that mean?


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

Feb 14, 2015 | Carrier Heating & Cooling

1 Answer

How do I connect a 24v damper motor with 6 colored wires red white yellow green blue black to NO COM NC terminals.


Choose two colors of the thermostat wire, and connect them to the NO and COM and connect them to the zone control board leads for the zone intended. Almost all zone valves spring return open when deenergized. So ensure the zone valve is open with the system is off. At the base of zone valve there is a set screw that needs to engage the damper valve shaft in the open position with the motor in the spring release position. Most zone valve are 90 degree moment from full open to full shut. If you have a Carrier zone valve, they go full open to full shut in 45 degrees of motion. Your open stop need to be set so the valve stops in the full stop position.
To help understand the operation of a zone system, say you have 2 zone system and zone 1 thermostat initiates a heat or cool demand. Zone 2 valves energizes and shuts and zone 1 stays open and allow air to heat/ cool zone 1. If zone 2 thermostat simultaniously initiates the same heat/cool demand, the zone 2 valve opens and both zone heat/cool. When either thermostat is satisfied the opposite zone valve closes and when both thermostat are satisfied both zone valves open.
Hope this helps you understand zone operation. The same works for higher multizone systems.

Jul 27, 2014 | Honeywell Motorized Small Rectangular Hvac...

2 Answers

Our Carrier Comfort Zone II thermostat, which has 2 zone readouts, currently shows a temperature of 00, as in zero zero, on one zone. That is the main zone for our home. Zone 2, for spare bedrooms, etc....


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.

Sep 25, 2010 | Heating & Cooling

1 Answer

The Carrier comfort zone thermostst displays the


Go to panal and reset control. Small reset button on control board. Let me know if it clears.James

Oct 12, 2009 | Carrier 38CKC042 Air Conditioner

1 Answer

Carrier Comfort Zone II Smart Control in one zone frequently cycles unit (every 20-30 minutes) even when temperature in the room does not change significantly and the indicated thermostat temperature does...


sounds like your zone control tstat needs calabrated or maybe replaced,in owners manual there should be a section on calibration if not you may have to replace it

Sep 09, 2009 | Heating & Cooling

1 Answer

We have the same problem, was hit with lightning and came up E1


You didn't get a Carrier tech. Carrier technicians only work on commercial equipment. Residential applicaitions, installation and service of Carrier residential units are done by dealers. They are not carrier owned but get buy the product at discount get training and get to show our logo. You can't fix the boards, they have to be replaced. It sounds like you have a Gen II VVT system. You can get the part via Totaline stores or a distributor. You will need to know how to readdress the other controllers to operate correctly. Use WWW.Carrier.com.

Aug 03, 2009 | Carrier 38CKC060 Air Conditioner

1 Answer

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


I reset the circuit breaker to the panel and everything is good now.

Jun 24, 2009 | Carrier 38CKC060 Air Conditioner

1 Answer

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.

Feb 18, 2009 | Carrier 38CKC060 Air Conditioner

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