Honeywell CT87J User's Manual

Honeywell Thermostats User's Manual - CT87J.
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Verify that you have the

correct thermostat
Using the compatibility chart 

below, verify that you purchased 

the correct CT87Thermostat for 

your heating/cooling system. If 

you are unsure which model is 

right for your system, visit 

www.honeywell.com/

yourhome or call Honeywell 

Customer Care at 

1-800-468-1502.

* CT87A is compatible with 2-wire cooling-only systems.

Heating/Cooling system

Compatible with:

CT87A CT87B

CT87J

Heating only: Gas or oil fueled warm air, steam, or hot 

water heat

Yes

Yes

No

Cooling only: Electric air conditioning

Yes*

Yes

Yes

Heating and cooling: Gas or oil fueled warm air, 

steam, or hot water heat with electric air conditioning

No

Yes

No

Single stage heat pump: Outdoor heating/cooling unit 

(compressor) with no auxiliary or backup heat.

No

No

Yes

Electric heat furnace with or without cooling:

No

No

Yes

Electric baseboard: Electric heating strips located just 

above the floor, usually 120-240 volts

No

No

No

Multistage: A conventional system with more than one 

stage, or an outdoor heating/cooling unit (compressor) 

with auxiliary or backup heat.

No

No

No

1

CT87A,B,J Round® Thermostat

LOW VOLTAGE (15 TO 30 VAC),

THERMOSTAT AND MOUNTING HARDWARE

Installation Instructions

0.484933s