
TH450 NON-PROGRAMMABLE THERMOSTAT
This product is manufactured by Resideo Technologies, Inc., Golden Valley, MN, 1-800-831-2823
©2020 Resideo Technologies, Inc. All rights reserved.
www.resideo.com
Resideo Inc., 1985 Douglas Drive North,
Golden Valley, MN 55422
69-2659EF—05 M.S. Rev. 07-20 | Printed in United States
6. POWER OUTAGE
During a power outage, the setpoint is saved in memory. You
do not need to adjust the temperature when power returns.
7. TROUBLESHOOTING
8. SPECIFICATIONS
Power supply:
120/208/240 VAC, 60 Hz
Minimum load:
1.25 A / 150 W @ 120 VAC, 60 Hz
1.25 A / 260 W @ 208 VAC, 60 Hz
1.25 A / 300 W @ 240 VAC, 60 Hz
Maximum load:
16.7 A / 2000 W @ 120 VAC, 60 Hz
16.7 A / 3465 W @ 208 VAC, 60 Hz
16.7 A / 4000 W @ 240 VAC, 60 Hz
Setpoint range:
5 °C to 30 °C (41 °F to 86 °F)
Display range:
0 °C to 60 °C (32 °F to 140 °F)
Resolution:
± 0.5 °C (± 1 °F)
Storage:
-20 °C to 50 °C (-4 °F to 120 °F)
ICES-003 Class B Notice - Avis NMB-3, Classe B
This Class B digital apparatus complies with Canadian ICES-
003.
WARRANTY
Resideo warrants this product, excluding battery, to be free
from defects in workmanship or materials, under normal use
and service, for a period of three (3) years from the date of
first purchase by the original purchaser. If at any time during
the warranty period the product is determined to be defective
due to workmanship or materials, Resideo shall repair or
replace it (at Resideo’s option).
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase,
to the place from which you purchased it; or
(ii) call Resideo Customer Care at 1-800-831-2823.
Customer Care will make the determination whether the
product should be returned to the following address: Resideo
Return Goods, 1985 Douglas Dr. N., Golden Valley, MN 55422,
or whether a replacement product can be sent to you.
This warranty does not cover removal or reinstallation costs.
This warranty shall not apply if it is shown by Resideo that
the defect was caused by damage which occurred while the
product was in the possession of a consumer.
Resideo’s sole responsibility shall be to repair or replace the
product within the terms stated above. RESIDEO SHALL NOT
BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND,
INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL
DAMAGESRESULTING,DIRECTLYORINDIRECTLY, FROMANY
BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY
OTHER FAILURE OF THIS PRODUCT.
Some states do not allow the exclusion or limitation of
incidental or consequential damages, so this limitation may
not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY
RESIDEO MAKES ON THIS PRODUCT. THE DURATION OF ANY
IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, IS HEREBY LIMITED TO THE THREE 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 you.
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 Resideo
Customer Care, 1985 Douglas Dr, Golden Valley, MN 55422 or
call 1-800-831-2823.
PROBLEM SOLUTIONS
Thermostat’s
housing is hot. This is normal. When the thermostat is
running at full capacity, its housing
can reach 40 °C (104 °F).
LO is displayed. The measured temperature is below
the display range. Heating is activated.
HI is displayed. The measured temperature is above
the display range.
Wrong temperature
is displayed. Rectify if any of the following
conditions applies:
•The thermostat is exposed to air
draft.
•The sticker on the thermostat’s
screen has not been removed.
•The thermostat is located near or
above a heat source such as a light
dimmer.
Display disappears
and reappears after
a few minutes.
The thermal protection device on the
heater has temporarily opened. This
can happen if the heater is obstructed
by furniture or curtain and has
overheated, or if the heater’s thermal
protection device is too sensitive.
E1 or E2 is
displayed The thermostat performance is
reduced due to a sensor error. Please
contact technical support for more
information.