Carrier TC-NHP Non-Programmable Thermostat Installation Instructions


Carrier TC-NHP Non-Programmable Thermostat Carrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions

This Comfortt non–programmable thermostat is an easy to use model that provides the most sought–after features for keeping your home comfortable. And with a slim profile, it is designed to be as smart – and smart–looking – as any of the other electronics in your home. Let this manual show you how easy it is to enjoy the newest experience in home comfort.
Designed and Assembled in the U.S.A.
NOTE: Read the entire instruction manual before starting the installation.

BUTTON IDENTIFICATIONCarrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-1

  • a. FAN: Selects whether the fan operates continuously (on) or only when needed for heating or cooling (auto)
  • b. MODE: Selects whether thermostat is set for heating, cooling, emergency heat (heat pump system only), auto (heat and cool as needed), or off
  • c. UP: Increases the temperature or adjusts the screen selection up when setting advanced features
  • d. DOWN Decreases the temperature or adjusts the screen selection down

ON–SCREEN INDICATORSCarrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-2

  1. Fan mode – on or auto
  2. System is in auxiliary (supplemental) mode
  3. Current temperature
  4. Thermostat mode is either off or using emergency heat
  5. Fahrenheit
  6. Keypad is locked (no padlock means unlocked)
  7. Celsius
  8. Battery strength indicator
  9. Selected cooling set point; “on” indicates system is in cooling mode
  10. Second stage of cooling is active


Setting the temperatures for heating and cooling
Your thermostat is installed with the heating set at 68° F and the cooling set at 72° F. You can use these or change them so your home is as warm or as cool as you would like it to be. These steps will hold the temperature where you set it.

  1. To change the heating temperature, press the mode button on the left until the screen says heat.
  2. Press the up or down button located on the right side of the display until you reach the desired temperature.
  3. To change the cooling temperature, press the mode button on the left until the screen says cool.
  4. Press the up or down button located on the right side of the display until you reach the desired temperature.Carrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-3

Using the fan
When the fan is on, it helps distribute air throughout your home for a more even temperature in all spaces. You can set the thermostat so that the fan runs only during your heating and cooling cycles (auto mode) or to run continuously.
The thermostat is set at the factory to run automatically as needed. Here’s how to change the setting so it runs continuously.

  1. Press the fan button on the left. The display message will change from auto fan to fan on.
  2. To return the fan to auto mode, press the fan button again. You will see fan auto on the display.Carrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-4

Using emergency heat (heat pump systems only)
Emergency heat is useful when the automatic auxiliary heat system can’t keep up with demand. (Systems with heat pumps use “auxiliary heat” when it’s too cold outside for the heat pump to heat the house without help. The display indicator for this is aux heat on.)
If the heat pump compressor that works with auxiliary heat fails, or if the heat pump isn’t working at all, you can turn on the emergency heat for that extra help. (You’ll know there’s a problem if the house can’t seem to get warm when it’s very cold outside.) You want to avoid using emergency heat, though, because it’s the most expensive option. And, of course, if you suspect a problem with your heat pump, call your heating and cooling dealer immediately.
Here’s how to set your thermostat to use emergency heat.

  1. Press the mode button repeatedly until you see Em heat in the upper left of the display.
  2. To turn off emergency heat, press the mode button again to select heat, cool or auto.Carrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-5

Installing or replacing the batteries

You can install batteries in your thermostat so that if the power goes out, the display will still show the indoor temperature.
In some situations, batteries are also the power source. Then, two AA batteries should last about one year. When the batteries have lost about one–third of their power, a battery icon appears on the display. Two–thirds of it will be black. As the batteries get weaker, the icon goes down to one black bar and then none. When the icon is empty, you will begin to lose thermostat functions when it is battery powered. When the batteries are completely dead, you won’t be able to use the thermostat.
When using batteries for power, we recommend that you replace the batteries at the one bar level with two AA alkaline batteries. They’re in the back of the thermostat, so you’ll have to remove it from the wall.
Here’s how to both install and replace batteries.

  1. Locate the latch at the top of the thermostat. It’s at the center of the top rim.Carrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-6
  2. Press it down. This will disconnect the thermostat from the top of the wall plate.
  3. Remove the thermostat from the wall bracket com-pletely by bringing it slightly toward you and lifting it up and off the lip on the lower edge of the wall bracket.
  4. Set the thermostat face down on a flat surface. You will see the batteries in the lower right corner.
  5. Remove and discard the old batteries.
  6. Install new batteries by matching the “plus” and “minus” ends of the batteries with the “plus” and “minus” indicat-ors you’ll see outside the two white battery shapes in the space where the batteries sit.
  7. Snap the batteries into place.
  8. Put the thermostat back on the wall bracket by lining up the slot on the bottom edge of the back of the thermostat with the lip on the wall bracket. You will feel the slot fit over the lip.Carrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-7
  9. With the bottom of the thermostat attached to the bottom of the wall bracket, bring the thermostat back to the wall. Line up the latch at the top of the thermostat with the corresponding lip on the wall bracket.
  10. Lightly push the thermostat toward the wall. When the latch and lip are lined up properly, you will hear the thermostat snap into place.
  11. Close the door.Carrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-8

Using the thermostat to turn the heating and cooling system off
To use the thermostat to turn the heating and cooling system off, press the mode button on the left repeatedly until the display shows off in the upper left.

Auto changeover
The thermostat uses one of five modes: heat, cool, Em heat (heat pump version only), auto, and off. When the mode selection is auto, the thermostat is in auto changeover mode. This allows the system to switch from heating to cooling – or from cooling to heating – to maintain the temperatures you’ve set. It does this automatically.Carrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-9


Advanced options display codes chart
You can customize a few features of your thermostat. This chart shows which features you can change and the codes associated with them. The codes will be shown on the display when you follow the instructions.

Feature Configuration Code Change Indication
Fahrenheit to Celsius U1 F or C
backlighting U2 On or Of
keypad lockout U3 Of, On, padlockCarrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-10

Changing from Fahrenheit to Celsius
Your thermostat is preset to display the temperature in degrees Fahrenheit. You can change this to Celsius.

  1. Press and hold the mode button for about three seconds. The display will show U1 and the letter F in the center.
  2. Press the up or down button on the right to change it from F (Fahrenheit) to C (Celsius).
  3. Press the fan button on the left to exit this screen.Carrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-11

Turning on the continuous backlighting
The thermostat display lights up for a few seconds after you press any button. This is backlighting. It will go dark after a few seconds.
If the thermostat is powered by electricity, it is possible to have a constant low level amount of backlighting until you press any button, which increases the lighting temporarily. Here’s how to turn on the constant backlight when your thermostat is poweredbyelectricity.

  1. Press and hold the mode button for about three seconds. The display will show U1 and the letter F in the center.
  2. Press the mode button twice. The display will show U2 and Off.
  3. Press the up or down button on the right to change it from Off to On.
  4. Press the fan button on the left to exit this screen.Carrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-12

Keypad lockout
The keypad lockout feature lets you “lock” the thermostat so nobody can change the temperature – or make any other changes – by pressing buttons. Keypad lockout is not activated when the thermostat is installed. Here’s how to activate it.

  1. Press and hold the mode button for about three seconds. The display will show U1 and the letter F in the center.
  2. Press the mode button until the display shows U3 and Of.
  3. Press the up or down button on the right to change it from Of to On. You will also see a padlock, which indic-ates the keypad is locked.
  4. Press the fan button on the left to exit this screen.Carrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-13

Unlocking the keypad
Here’s how to temporarily unlock the keypad.

  1. Press and hold the up and down buttons on the right simultaneously for about five seconds.
  2. The padlock icon will disappear. This means the keypad is unlocked and can be used. The keypad will revert back to the locked state after you’ve stopped pushing buttons for two minutes.Carrier-TC-NHP-Non-Programmable-Thermostat-Installation-Instructions-14


The battery icon is displayed
The battery icon appears on the display only when the battery starts to lose power. Replace it when one–third of the icon is black. If your thermostat is battery powered and you wait until the icon is just a silhouette with no black bars, you will slowly lose thermostat functions until it doesn’t work at all.

“Aux heat on” is displayed (heat pump systems only)
Aux heat on is auxiliary heat. It applies only to the heat pump version. If it is on, you will see aux heat on. When it is displayed, it means the system has determined that it’s too cold outside for your heat pump to heat the house without help, so it’s getting help from the electric heaters. This hap-pens automatically.

“Em heat” is displayed (heat pump systems only)
Em heat is the display term for emergency heat and applies only to the heat pump version. You have to turn on emergency heat manually – it doesn’t happen automatically – so if you see Em heat on the display, it means somebody has turned it on.

Thereisa poweroutage
If you lose electricity and have batteries installed, the thermostat will continue to display the indoor temperature because it has a battery backup power source. This means that even though your heating and cooling system doesn’t work, you will still be able to monitor your home’s temperature.
You get a system error message
Here are the possible system error messages and what they mean:

  • —- The room air sensor reports that the room air temperature is above 150° or below –50°.
  • E4 The memory has failed and the thermostat will return to the default factory settings. Call your heating and cooling dealer.


Auto changeover 
This feature automatically switches your system from heating to cooling – or from coolingtoheating–whenevernecessary.

Auxiliary heat (heat pump systems only)
Most heat pump systems can’t heat a home sufficiently when it gets very cold outside so they use a supplemental heating source called auxiliary heat. The system knows when to use this help and does so automatically. If it’s using auxiliary heat, the display will show aux heat on. You have no control over the auxiliary heat function.

Backlighting illuminates your display when you push a button.

Emergency heat (heat pump systems only)
You can manually set the thermostat to use emergency heat but it is the most expensive option. If it’s using emergency heat, the display will show Em heat.

This term refers to the type of operation your system is performing. The options are heat, cool, emergency heat, auto, and off.


Limited Warranty for Thermostats
Contact the installer or a Carrier dealer. You may be able to find the installer’s name on the equipment or in your Owner’s Packet. You can also find a Carrier dealer online at
For help, contact: Carrier Corporation, Consumer Relations, P.O. Box 4808, Syracuse, New York 13221, Phone 1–800–227–7437
PRODUCT REGISTRATION: You can register your product online at

  • Model Number_______________________
  • Serial Number_______________________
  • Date of Installation____________________
  • Installed by_________________________
  • Name of  Owner_______________________
  • Address of Installation_________________

Carrier Corporation (hereinafter “Company”) warrants this product against failure due to defect in materials or workmanship under normal use and maintenance as follows. All warranty periods begin on the date of original installation. If a part fails due to defect during the applicable warranty period Company will provide a new or remanufactured part, at Company’s option, to replace the failed defective part at no charge for the part. Alternatively, and at its option, the Company will provide a credit in the amount of the then factory selling price for a new equivalent part toward the retail purchase price of a new Company product. Except as otherwise stated herein, those are Company’s exclusive obligations under this warranty for a product failure. This limited warranty is subject to all provisions, conditions, limitations and exclusions listed below and on the reverse (if any) of this document.

This warranty is to the original purchasing owner and is transferable only to the extent and as stated in the Warranty Conditions and below. The warranty period in years, depending on the part and the claimant, is as shown in the chart below.

Limited Warranty (Years)
Product Original Owner Subsequent Owner
TP, TC, TB Thermostats*** 10* (or 5) 5
  • If properly registered within 90 days, otherwise 5 years (except in California and Quebec and other jurisdictions that prohibit warranty benefits conditioned on registration, registra-tion is not required to obtain longer warranty periods). See Warranty Conditions below.
  • Applies only to Thermostats. Active electronic finished good accessories, such as the op- tional ExP module, have different warranty terms. See product for details.

OTHER RESIDENTIAL APPLICATIONS (Apartments, Rental Properties, etc.)
The warranty period is five (5) years. The warranty is to the original owner only and is not transferable.

The warranty is one (1) year on all such applications. The warranty is to the original owner only and is not transferable.

The owner must notify the Company in writing, by certified or registered letter to Carrier Corporation, Warranty Claims, P.O. Box 4808, Syracuse, New York 13221, of any defect or complaint with the product, stating the defect or complaint and a specific request for repair, replacement, or other correction of the product under warranty, mailed at least thirty (30) days before pursuing any legal rights or remedies.


  1. To obtain the longer warranty periods as shown in the table under original owner, for the original purchaser, the product must be properly registered at within ninety (90) days of original installation. In jurisdictions where warranty terms conditioned on registration are prohibited by law, registration is not required and the longer warranty period shown will be apply.
    2. Where a product is installed in a newly constructed home, the date of installation is the date the homeowner purchased the home from the builder.
    3. If the date of original installation cannot be verified, then the warranty period begins ninety (90) days from the date of product manufacture (as indicated by the model and serial number). Proof of purchase may be required at time of service.
    4. The remainder of the first five years of warranty is freely transferable without registration.
    5. Product must be installed properly and by a licensed HVAC technician.
    6. The warranty applies only to products remaining in their original installation location.
    7. Installation, use, care, and maintenance must be normal and in accordance with instructions contained in the Installation Instructions, Owner’s Manual and Company’s service information.
    8. Defective parts must be returned to the distributor through a registered servicing dealer for credit.\



  1. Labor or other costs incurred for diagnosing, repairing, removing, installing, shipping, servicing or handling of either defective parts, or replacement parts, or new units.
  2. Any product purchased over the Internet.
  3. Normal maintenance as outlined in the installation and servicing instructions or Owner’s Manual, including filter cleaning and/or replacement and lubrication.
  4. Failure, damage or repairs due to faulty installation, misapplication, abuse, improper servicing, unauthorized alteration or improper operation.
  5. Failure to start due to voltage conditions, blown fuses, open circuit breakers, or damages due to the inadequacy or interruption of electrical service.
  6. Failure or damage due to floods, winds, fires, lightning, accidents, corrosive environments (rust, etc) or other conditions beyond the control of Company.
  7. Parts not supplied or designated by Company, or damages resulting from their use.
  8. Products installed outside the U.S.A. or its territories and Canada.
  9. Electricity or fuel costs, or increases in electricity or fuel costs from any reason whatsoever, including additional or unusual use of supplemental electric heat.
  10. Any cost to replace, refill or dispose of refrigerant, including the cost of refrigerant.
  11. ANY SPECIAL, INDIRECT OR CONSEQUENTIAL PROPERTY OR COMMERCIAL DAMAGE OF ANY NATURE WHATSOEVER. Some states or provinces do not allow the exclusion of incidental or consequential damages, so the above limitation may not apply to you.

This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state or province to province.
Copyright 2012 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.


Download manual: Carrier TC-NHP Non-Programmable Thermostat Installation Instructions


Carrier TC-NHP Non-Programmable Thermostat Installation Instructions


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