Honeywell HomeTH4000 Programmable Thermostat Product Guide Operating Manual


Honeywell HomeTH4000 Programmable Thermostat 


About your new thermostat

Your new Honeywell thermostat has been designed to give you many years of reliable service and easy-to-use, push-button climate control.

  • Separately programmable weekday/weekend schedules.
  • One-touch temp control overrides program schedule at any time.
  • Energy Star® compliant to greatly reduce your heating/cooling expenses.
  • Large, clear, backlit display is easy to read.
  • Displays both room temperature and temperature setting.
  • Built-in compressor protection.

This thermostat is ready to go

Your new thermostat is pre-programmed. Just set the time and day. Then check the settings below and change them if needed:

  1. Set time and day (required for proper operation)
  2. Select system setting: Preset to Off
  3. Select fan setting: Preset to Auto
  4. Program schedules: Preset to energy-saving levels (assumes you wake at 6 am, leave at 8 am, return at 6 pm, and sleep at 10 pm)
    ONE-TOUCH TEMP CONTROL: You can override the program schedule at any time, and manually adjust the temperature.

A quick reference to controls


Quick reference to display screen


Set the time and day


  1. Press the SET button, then press Honeywell-HomeTH4000-Programmable-Thermostat-FIG.4to set the clock time.
  2. Press the SET button, then pressHoneywell-HomeTH4000-Programmable-Thermostat-FIG.4to select the day of the week.
  3. Press RUN to save & exit.
    Note: If the display flashes Set Clock, the thermostat will follow your settings for the weekday “Wake” time period until you reset the time and day.

System switch


The SYSTEM switch can be set to control your heating or cooling system, depending on the season.

  • Cool: Cooling system control.
  • Off: All systems are off.
  • Heat: Heating system control.
  • Em Heat: Emergency & Auxiliary Heat control. Compressor is locked out. (Select models only.)

CAUTION: EQUIPMENT DAMAGE HAZARD. Do not operate cooling system when outdoor temperature is below 50°F (10°C).

Fan switch


Set the FAN switch to Auto or On.
In “Auto” mode (the most commonly used setting), the fan runs only when the heating or cooling system is on.
If set to “On,” the fan runs continuously.

Save money by setting program schedules

It’s easy to program your system for maximum energy savings. You can program four time periods each day, with different settings for weekdays and weekends.

  • Honeywell-HomeTH4000-Programmable-Thermostat-FIG.7Set to the time you awaken and the temperature you want during the morning, until you leave for the day.
  • Honeywell-HomeTH4000-Programmable-Thermostat-FIG.8Set to the time you leave home and the temperature you want while you are away (usually an energy-saving level).
  • Honeywell-HomeTH4000-Programmable-Thermostat-FIG.9Set to the time you return home and the temperature you want during the evening, until bedtime.
  • Honeywell-HomeTH4000-Programmable-Thermostat-FIG.10Set to the time you go to bed and the temperature you want overnight (usually an energy-saving level).

Energy Star® settings for maximum cost savings

This thermostat is pre-set to use Energy Star® program settings. We recommend these settings since they can reduce your heating/cooling expenses by as much as 33%. (See next page to adjust times and temperatures of each time period.)


To adjust program schedules


  1. Press SET until Set Schedule is displayed.
  2. Press Honeywell-HomeTH4000-Programmable-Thermostat-FIG.4to set your weekday Wake time (Mon-Fri), then press SET.
  3. PressHoneywell-HomeTH4000-Programmable-Thermostat-FIG.4to set the temperature for this time period, then press SET.
  4. Set time and temperature for the next time period (Leave). Repeat steps 2 and 3 for each weekday time period.
  5. Press SET to set weekend time periods (Sat-Sun), then press RUN to save & exit.
    Note: Make sure the thermostat is set to the system you want to program (Heat or Cool).
    Note: To cancel an unwanted time period (except Wake), press and hold s + HOLD for 4 seconds while in the Set Schedule mode.

Program schedule override (temporary)


PressHoneywell-HomeTH4000-Programmable-Thermostat-FIG.4to immediately adjust the temperature. This will temporarily override the temperature setting for the current time period.
The new temperature will be maintained only until the next programmed time period begins (see page 9). For example, if you want to turn up the heat early in the morning, it will automatically be lowered later, when you leave for the day.
To cancel the temporary setting at any time, press RUN.

Program schedule override (permanent)


Press HOLD to permanently adjust the temperature. This will override the temperature settings for all time periods.
The “Hold” feature turns off the program schedule and allows you to adjust the thermostat manually, as needed.
Whatever temperature you set will be maintained 24 hours a day, until you manually change it, or press RUN to cancel “Hold” and resume the program schedule.

Note: Make sure the thermostat is set to the system you want to control (heat or cool).

Adaptive Intelligent RecoveryTM (AIR)

Adaptive Intelligent Recovery eliminates guesswork when setting your schedule.
It allows the thermostat to “learn” how long your furnace and air conditioner take to reach the temperature you want.
Just set your program schedule to the time you want the house to reach your desired temperature. The thermostat then turns on the heating or cooling at just the right time to reach your scheduled temperature at your scheduled time.
For example: Set the Wake time to 6 am and the temperature to 70°. The heat will come on before 6 am, so the temperature is 70° by the time you wake at 6.

Built-in compressor protection


This feature helps prevent damage to the compressor in your air conditioning or heat pump system.
Damage can occur if the compressor is restarted too soon after shutdown. This feature forces the compressor to wait for a few minutes before restarting.
During the wait time, the display will flash the message Cool On (or Heat On if you have a heat pump). When the safe wait time has elapsed, the message stops flashing and the compressor turns on.

Battery replacement


Batteries are optional (for backup power) if your thermostat was wired to run on AC power when installed.
Install fresh batteries when the REPLACE BATT warning begins flashing. The warning flashes about two months before the batteries are depleted.
Replace batteries once a year, or before leaving home for more than a month. If batteries are inserted within one minute, the time and day will not have to be reset. All other settings are permanently stored in memory, and do not require battery power.

In case of difficulty

If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.

Display is blank

  • Check circuit breaker and reset if necessary.
  • Make sure power switch at heating & cooling system is on.
  • Make sure furnace door is closed securely.
  • Make sure fresh AA alkaline batteries are correctly installed (see page 16).

Heating or cooling system does not respond

  • Set system switch to Heat (see page 7). Make sure the temperature is set higher than the Inside temperature.
  • Set system switch to Cool (see page 7). Make sure the temperature is set lower than the Inside temperature.
  • Wait 5 minutes for the system to respond.

Temperature settings do not change
Make sure heating and cooling temperatures are set to acceptable ranges:

  • Heat: 40° to 90°F (4.5° to 32°C).
  • Cool: 50° to 99°F (10° to 37°C).
    “Cool On” or “Heat On” is flashing
  • Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor (see page 15).

“Heat On” is not displayed

  • Set the System switch to Heat, and set the temperature level above the current room temperature (see page 7).

“Cool On” is not displayed

  • Set the System switch to Cool, and set the temperature level below the current room temperature (see page 7).

To restore Energy Star® default settings
Follow these steps to restore Energy Star default settings (see page 10):

  • Press SET 3 times to display “Set Schedule.”
  • Press and hold SET and RUN at the same time for 4 seconds.
  • Press RUN.

Customer Assistance


For assistance with this product, please visit
Or call Honeywell Customer Care toll-free at 1-800-468-1502.
To save time, please note your model number and date code before calling.
Accessories/replacement parts
To order, please call Honeywell Customer Care toll-free at 1-800-468-1502.
Cover plate assembly*….Part No. 50002883-001
*Use to cover marks left by old thermostats.

5-year limited warranty

Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of five (5) years from the date of purchase by the consumer. If at any time during the warranty period the product is determined to be defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option).
If the product is defective,

  • return it, with a bill of sale or other dated proof of purchase, to the place from which you purchased it; or
  • call Honeywell Customer Care at 1-800-468-1502. Customer Care will make the determination whether the product should be returned to the following address:

Honeywell Return Goods, Dock 4 MN10-3860, 1885 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 Honeywell that the defect or 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 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.
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 Honeywell Customer Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-1502. In Canada, write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V4Z9.

Automation and Control Solutions

Honeywell International Inc.
1985 Douglas Drive North Golden Valley, MN 55422

Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers.

® U.S. Registered Trademark.
© 2009 Honeywell International Inc.
69-1760EFS—01 M.S. 05-09

Honeywell Limited-Honeywell Limitée 35 Dynamic Drive
Toronto, Ontario M1V 4Z9


Download Manual:Honeywell HomeTH4000 Programmable Thermostat Product Guide Operating Manual


Honeywell HomeTH4000 Programmable Thermostat Product Guide Operating Manual





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