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T410A,B  
Line Voltage  
Electric Heat Thermostats  
INSTALLATION INSTRUCTIONS  
T410A provides single-line break.  
T410B provides double-line break.  
Temperature Range: 40°F to 80°F (4°C to 27°C)  
1
PREPARATION  
Proper installation of your Honeywell thermostat will  
occur if you follow these instructions STEP-BY-  
Electrical Ratings: 60 Hz noninductive  
22A at 120-240 Vac; 19A at 277 Vac  
STEP. It is recommended that as you read, understand  
and complete each step, you check  it off with pencil or  
pen.  
Do-It-Yourself models  
Check thermostat suitability for your home’s system  
by reviewing the ratings listed above.  
Your Honeywell Thermostat  
Your new Honeywell T410 Electric Heating Thermostat  
provides line voltage control of a radiant cable, electric  
baseboard, and resistive-rated fan forced heaters within  
the ratings listed above.  
Make certain that your heating system is working,  
especially if it has been inoperative for a length of  
time. If the system does not work, contact your local  
electrician for assistance.  
Carefully unpack your new thermostat. To avoid  
damage to the sensing element, do NOT remove  
the thermostat cover until wiring has been completed.  
WARNING  
This thermostat is a line voltage control (120 Volts to  
240 Volts.) Do not install it if you are not completely  
familiar with house wiring. If handled improperly,  
there can be risk of a 120 Volt to 240 Volt electric  
shock hazard, which may cause serious injury or  
death.  
Save packages of screws, instructions, receipt and  
proof-of-purchase.  
MERCURY NOTICE  
If this control is replacing a control that contains  
mercury in a sealed tube, do not place you old  
control in the trash. Dispose of properly.  
2
REMOVE OLD THERMOSTAT  
WARNING  
Begin by turning off power to the heating circuit at  
the main service panel.  
Contact you local waste management authority for  
instruction regarding recycling and the proper  
disposal of a old control.  
Remove cover of old thermostat—cover normally  
snaps off when pulled firmly from the bottom. If it  
resists, check for a screw that locks the cover.  
Loosen screws holding thermostat base to outlet box  
and lift away.  
Disconnect wires from old thermostat. As you  
disconnect each wire, tape the end and label it with  
the letter of the terminal designation to make reconnection  
to new thermostat easier.  
Check the old insulation for cracks, nicks or fraying,  
and apply high quality plastic tape where necessary  
for adequate insulation.  
Retain the old thermostat for reference purposes  
and until your new thermostat is functioning  
smoothly.  
®
U.S. Registered Trademark  
Copyright © 2002 Honeywell •  
All Rights Reserved  
69-1562-1  
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T410A,B LINE VOLTAGE ELECTRIC HEAT THERMOSTATS  
3
WIRE AND MOUNT NEW THERMOSTAT  
4
CHECK OUT THERMOSTAT  
Turn on the power to the heating system.  
Turn setting knob all the way clockwise  
Remove thermostat cover by grasping the top and  
bottom ends with fingers, and pulling outward.  
; listen  
for clicking sound as switch makes contact. Electric  
Connect wires to the thermostat as shown in the  
applicable wiring diagram. Push the wires into the  
heater should begin operation.  
outlet box, and insert the thermostat into the box for  
mounting by pushing against top and bottom of the  
thermostat base.  
Turn knob all the way counterclockwise  
for clicking sound as switch breaks contact. Electric  
heater should shut off.  
; listen  
IMPORTANT: Do not press on setting knob.  
Secure the thermostat to the box with the two captive  
mounting screws provided.  
5
SETTING THERMOSTAT  
Begin with setting knob at 70°F (20°C) on the scale.  
Replace thermostat cover.  
If this setting is not satisfactory after at least two  
hours of operation, turn setting knob upscale to  
Set knob to desired room temperature.  
raise the temperature, or downscale to lower the tempera-  
ture. Move knob only a degree each time.  
IMPORTANT: Rough handling or strong pressure can  
damage knob or sensing element, and change  
calibration.  
L1  
(HOT)  
L2  
1
1
T410B  
T410A  
3
L2  
L1  
T1  
L1  
T1  
2
4
4
T2  
3
TO  
ELECTRIC  
HEATER  
ELECTRIC  
HEATER  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
2
3
4
BREAKS ON POSITIVE OFF.  
EXPOSED UNUSED LEADWIRES TO BE PROPERLY INSULATED.  
THERMALLY ACTIVATED—BREAKS ON TEMPERATURE  
RISE. MAKES ON TEMPERATURE FALL.  
CAUTION:  
SPECIAL SERVICE CO/ALR SOLDERLESS CONNECTORS MUST  
BE USED WHEN CONNECTING WITH ALUMINUM CONDUCTORS;  
OTHERWISE, A FIRE HAZARD CAN RESULT.  
M19099  
69-1562–1  
2
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T410A,B LINE VOLTAGE ELECTRIC HEAT THERMOSTATS  
6
TROUBLESHOOTING  
Your Honeywell thermostat requires little or no attention. Most problems can generally be traced to the following:  
Symptom  
No heat.  
Checkout  
Action  
Make sure power is on at  
main service panel. Turn  
the temperature setting  
knob fully clockwise  
Heater should start to warm up within two minutes. If not,  
contact qualified electrician to check thermostat and heater.  
.
Improper connections to  
thermostat.  
With power to circuit OFF, tighten all wiring connections.  
Repair any frayed or broken wires.  
Other.  
Contact a qualified electrician for assistance.  
Heater never turns  
off.  
Turn temperature setting  
knob fully  
Heater should start to cool within minutes. If not, turn off  
power at the main service panel, and contact qualified  
electrician.  
counterclockwise  
.
Thermostat setting  
and thermometer  
reading disagree.  
Thermostat affected by  
drafts or radiant heat.  
Contact electrician to change the location. The thermostat  
should be about 5 ft (1.5m) above the floor and on an  
inside wall.  
3
69-1562–1  
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Limited One-Year Warranty  
Honeywell warrants this product to be free from defects in the workmanship or materials, under normal use and service, for  
a period of one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the product is  
defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option) within a reasonable period of time.  
If the product is defective,  
(
i) return it, with a bill of sale or other dated proof of purchase, to the hardware or home center store where you purchased  
it, or  
(
ii) package it carefully, along with proof of purchase (including date of purchase) and a short description of the malfunc-  
tion, and mail it, postage prepaid, to the following address:  
Honeywell Return Goods  
Dock 4 MN10-3860  
in Canada: Honeywell Limited/Honeywell Limitee  
35 Dynamic Dr  
1985 Douglas Dr N  
Scarborough, Ontario M1V 4Z9  
Golden Valley, MN 55422  
This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the  
defect of malfunction was caused by damage which occurred while the product was in the possession of a consumer.  
Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL  
NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL  
DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IM-  
PLIED, ORANY OTHER FAILURE OF THIS PRODUCT. Some states do not allow the exclusion of incidental or consequen-  
tial damages, so this limitation may not apply to you.  
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION  
OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PAR-  
TICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY. Some states do not  
allow limitations on how long an implied warranty lasts, so the above limitation may not apply to your.  
This warranty gives you specific legal rights, and you may have other rights which vary from state to state.  
If you have any questions concerning this warranty, please write to Honeywell Customer Relations, 1985 Douglas Dr N,  
MN10-1461, Golden Valley, MN 55422. In Canada write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitee,  
35 Dynamic Dr, Scarborough, Ontario M1V 4Z9.  
Automation and Control Solutions  
Honeywell International Inc. Honeywell Limited—Honeywell Limitée  
1985 Douglas Drive North  
35 Dynamic Drive  
Golden Valley, MN 55422  
Scarborough, Ontario M1V 4Z9  
69-1562–1  
G.H. 2-02  
www.honeywell.com/yourhome