Honeywell Wi-Fi® Thermostat Owner's Manual

Setting functions and options

You can change options for a number of system functions. Available functions depend on 
the type of system you have. The functions, along with available options, are described on 
pages 18–19.

This thermostat is pre-set for a single-stage heating/cooling system. Setting function 1 for 
a heat pump will adjust the default settings.

1 Press 

 and 

V

simultaneously and hold 

for approximately 3 seconds. The screen 
will change to display two numbers and the 
button designations will be Done, Back, blank, 
Next.

2 Press 

 until you see the function 

number—the larger number on the left— 
you want to set.

3  Change options for any function by pressing 

V

 or 

W

until the correct option (smaller 

number on right) is displayed.

4  Repeat Steps 2 and 3 until you have set all 

functions that you wish to change.

5  When you have made all changes, press 

 to save and exit.

MCR33883

MCR33884

System setup

If you are not sure  
of your heating/
cooling system 
type or have other 
questions, go to  
WIÚTHERMOSTATCOM

0 

Heat/cool: Gas, oil or electric heating with central air conditioning.

1 

Heat pump: Heat pump without backup or auxiliary heat.

2 

Heat only: Gas, oil or hot water heat without central air conditioning.

3 

Heat only with fan: Gas, oil or electric heat without central air 
conditioning.

4 

Cool only: Central air conditioning only.

5 

Heat pump: Heat pump with backup or auxiliary heating.

6 

Heat/Cool Multiple stages: 2 heat stages (wires on W and W2), 2 
cooling stages (wires on Y and Y2).

7 

Heat/Cool Multiple stages: 2 heat stages (wires on W and W2), 1 
cooling stage (wire on Y).

8 

Heat/Cool Multiple stages: 1 heat stage (wires on W), 2 cooling stages 
(wire on Y and Y2).

0 

Cooling changeover valve: Use this setting if you connected a wire 
labeled “O” to the O/B terminal.

1 

Heating changeover valve: Use this setting if you connected a wire 
labeled “B” to the O/B terminal.

0 

Gas or oil heat: Use this setting if you have a gas or oil heating system 
(system controls fan operation).

1 

Electric heat: Use this setting if you have an electric heating system 
(thermostat controls fan operation).