Honeywell CT3451 Support Question
Honeywell CT3451 Support Question
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Question posted by jcarrier933 on March 17th, 2023
I'm Having Problems Setting In And Changeing Temperature
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Answer #1: Posted by SonuKumar on March 17th, 2023 9:36 AM
SonuKumar
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May 9th, 2021 Points: 16,621,300
Member since:
May 9th, 2021 Points: 16,621,300
To reset the thermostat to its factory settings, follow these steps:
- Press the "MENU" button on the thermostat.
- Use the up or down arrow button to scroll to the "RESET" option and press "SELECT."
- Use the up or down arrow button to highlight "YES" and press "SELECT" again.
- The thermostat will now reset to its factory default settings.
Note that resetting the thermostat will erase all programmed settings and preferences, so you will need to reprogram the thermostat after resetting it. If you are unsure about how to program the thermostat, consult the user manual or contact a qualified HVAC technician for assistance.
Please respond to my effort to provide you with the best possible solution by using the "Acceptable Solution" and/or the "Helpful" buttons when the answer has proven to be helpful.
Regards,
Sonu
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Related Honeywell CT3451 Manual Pages
Owner's Manual - Page 1
...M20551
Fig. 1. Required installation tools/supplies.
® U.S.
Dispose of Honeywell engineering produced this thermostat is replacing a control that can provide you comfortable while saving energy when programmed according to these instructions. Your new thermostat automatically controls the temperature in your home, keeping you with your old control in a sealed tube, do...
Owner's Manual - Page 2
... old thermostat. If you want information about which programmable thermostats work with any 120/240 volt circuit.
CT3451 PROGRAMMABLE THERMOSTAT
2 REMOVE OLD THERMOSTAT
❑...temperature is not compatible with these systems. For details, contact a local heating/cooling contractor.
69-1620-1
2 Three Thermostat Wires
If you probably have three thermostat wires. The thermostat...
Owner's Manual - Page 3
...
IMPORTANT Level for appearance, if desired.
FOR WRAPAROUND, STRIP 7/16 IN. (11 mm)
FOR STRAIGHT INSERTION, STRIP 5/16 IN. (8 mm)
M12537
Fig. 5. WALL 1
WALL ANCHORS (2)
CT3451 PROGRAMMABLE THERMOSTAT
TERMINAL SCREW
FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM)
FOR WRAPAROUND STRIP 7/16 IN. (11 MM)
G
Rc
R
W B
Y O
M12559A
MOUNTING SCREWS (2)
WALLPLATE
1 WHEN USING WALL...
Owner's Manual - Page 4
... with 3-wire, cool-only system. M20536
Fig. 7.
Typical cool system hookup with single transformer. Typical heat-cool system hookup with 2-wire, heatonly system. CT3451 PROGRAMMABLE THERMOSTAT
THERMOSTAT G Rc
R
3
1 L1 (HOT)
L2
W Y
HEAT RELAY
FAN RELAY
COMPRESSOR CONTACTOR
B
O
2
COOL DAMPER
2
HEAT DAMPER
TRANSFORMER
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD...
Owner's Manual - Page 5
...is the correct setting for most systems. If you have an electric heat system, set at the top of the thermostat and
wallplate.
7 INSTALLING AND REPLACING BATTERIES
The thermostat requires three ...Fig. 11.
M20512
CT3451 PROGRAMMABLE THERMOSTAT ❑ Swing down due to lack of the thermostat onto the wallplate to latch. Fan operation (fuel) switch.
6 MOUNT THERMOSTAT TO WALLPLATE
❑...
Owner's Manual - Page 6
...Control
The following instructions provide information to change the heating and cooling control algorithm to choose either the Fahrenheit (°F) or Celsius (°C) display.
Press the ▲ key to enter Installer Setup.
C3 = Aggressive control algorithm (Default. Temperature (°F). -
SET
HT. CT3451 PROGRAMMABLE THERMOSTAT
AA BATTERIES (3)
PM TUE
AuFtoANOn
Hold
Select...
Owner's Manual - Page 7
... are sleeping.
Press the ▲ key to save all changes and return to set for your convenience with your heating Wake time. see Table 3), press Hold to the equipment manufacturer's instructions.
9 PROGRAM YOUR THERMOSTAT
The thermostat is the time period you are the same. CT3451 PROGRAMMABLE THERMOSTAT
NOTE: The heating and cooling program times are away...
Owner's Manual - Page 8
...key to set Wake temperature. Return a. SET
M20559
2. Return a. Press ▼ or ▲ key to set Sleep temperature. Press Select. Press Select.
Press Select. M20561
3. SET
M18567
b.
Press Select. Press ▼ or ▲ key to set Leave time. Press ▼ or ▲ key to set Return temperature. SET
SET
M12629B
4. CT3451 PROGRAMMABLE THERMOSTAT
SET
M12625C...
Owner's Manual - Page 9
...
❑ Press ▼ or ▲ key to displaying the current day time and temperature in effect until the next program period. Sleep a.
The thermostat reverts to set Sleep time. CT3451 PROGRAMMABLE THERMOSTAT
Setting Indefinite Temperature Hold
The Hold key allows you to indefinitely hold a temperature. When Hold is controlled directly by pressing the Hold key again.
❑ Press...
Owner's Manual - Page 10
...and cooling are off . indicates a call for five minutes before restarting. CT3451 PROGRAMMABLE THERMOSTAT
System Switch
❑ The System switch settings control thermostat operation as follows: Cool: The thermostat controls the cooling system. Press the ▲ key to raise the temperature setting above the room temperature to the E position for approximately ten seconds.
69-1620-1
10...
Owner's Manual - Page 11
... sure the batteries are correct. Your thermostat has reached the temperature limit.
The thermostat current setting does not match the displayed room temperature to come on indicator is flashing.
• MInimum off -timer is no warm or cool air is operating correctly.
Temperature change occurs at the register. • If the temperature setting is higher than 99°F (37...
Owner's Manual - Page 12
... Scarborough, Ontario M1V 4Z9
This warranty does not cover removal or reinstallation costs. CT3451 PROGRAMMABLE THERMOSTAT
PERCENT OF HEATING COSTS YOU CAN SAVE
SAVINGS FOR ONCE-A-DAY 10°F (5&#... AND ACTUAL HEAT LOSS OR GAIN, GEOGRAPHIC LOCATION, FREQUENCY OF TEMPERATURES CHANGE, AND RANGE IN DEGREES OF CHANGE.
M12545
Limited One-Year Warranty
Honeywell warrants this product, excluding ...
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