USER MANUAL

Honeywell

Honeywell Programmable Thermostat
Model : T6 Pro

Other Honeywell Pro Thermostat Manuals:

Package Includes

  • T6 Pro Thermostat
  • UWP Mounting System
  • Honeywell Standard Installation Adapter (J-box adapter)
  • Honeywell Decorative Cover Plate –Small; size 4-49/64 in x 4-49/64 in x11/32 in (121 mm x 121 mm x 9 mm)
  • Screws and anchors
  • 2 AA Batteries
  • Installation Instructions and User Guide

Optional Cover Plate installation

NOTE: If Optional Cover Plate is not required, see “UWP Mounting System installation” on next page.

Use the Optional Cover Plate when:

  • Mounting the thermostat to an electrical junction box
  • Or when you need to cover paint gap from old thermostat.
  1. Separate the Junction Box Adapter from the Cover Plate. See Figure 1.
01

2. Mount the Junction Box Adapter to the wall or an electrical box using any of the eight screw holes. Insert and tighten mounting screws supplied with Cover Plate Kit. Do not overtighten. See Figure 2. Make sure the Adapter Plate is level.

3. Attach the UWP by hanging it on the top hook of the Junction Box Adapter and then snapping the bottom of the UWP in place. See Figure 3.

02-03

4. Snap the Cover Plate onto the Junction Box Adapter. See Figure 4.

04

UWP Mounting System installation

5. Before starting, turn the power off at the breaker box or switch. Open package to find the UWP. See Figure 5.

6. Position the UWP on wall. Level and mark hole positions. See Figure 6. Drill holes at marked positions, and then lightly tap supplied wall anchors into the wall using a hammer.
‒‒ Drill 7/32” holes for drywall.

05-06

7. Pull the door open and insert the wires through wiring hole of the UWP. See Figure 7.

8. Place the UWP over the wall anchors. Insert and tighten mounting screws supplied with the UWP. Do not overtighten. Tighten until the UWP no longer moves. Close the door. See Figure 8.

07-08

Power options

Power options

Insert R and C wires into designated terminals for primary AC power (C terminal is optional if batteries are installed, but it is recommended). Remove wires by depressing the terminal tabs.

Insert AA batteries

Insert AA batteries for primary or backup power.

Setting Slider Tabs

Set R Slider Tab.

  • Use built-in jumper (R Slider Tab) to differentiate between one or two transformer systems.
  • If there is only one R wire, and it is connected to the R, Rc, or RH terminal, set the slider to the up position (1 wire).
  • If there is one wire connected to the R terminal and one wire connected to the Rc terminal, set the slider to the down position (2 wires).
UWP Mounting System

NOTE: Slider Tabs for U terminals should be left in place for T6 Pro models.

Wiring terminal designations

Note: Not all terminals may be used, depending on the system type that is being wired. The most commonly used terminals are shaded.

Wiring terminal designations
Wiring terminal designations
  • Terminal can be jumped using Slider Tab. See “Setting Slider Tabs” above.
  • The THP9045A1023 Wire Saver Module is used on heat/cool systems when you only have four wires at the thermostat, and you need a fifth wire for a common wire. Use the K terminal in place of the Y and G terminals on conventional or heat pump systems to provide control of the fan and the compressor through a single wire—the unused wire then becomes your common wire. See THP9045 instructions for more information.

Wiring conventional systems: forced air and hydronics
Shaded areas below apply only to TH6320U/TH6220U or as otherwise noted.

1H/1C System (1 transformer)
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
Y Compressor contactor
C 24VAC common [3]
W Heat relay
G Fan relay

Heat-only System
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
C 24VAC common [3]
W Heat relay

Heat-only System (Series 20) [5]
R Series 20 valve terminal “R” [1]
Rc [R+Rc joined by Slider Tab] [2]
Y Series 20 valve terminal “W”
C 24VAC common [3]
W Series 20 valve terminal “B”

Heat-only System
(power open zone valve) [5]
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
W Valve
C 24VAC common [3]

1H/1C System (2 transformers)
R Power (heating transformer) [1]
Rc Power (cooling transformer) [1]
Y Compressor contactor
C 24VAC common [3, 4]
W Heat relay
G Fan relay

Heat-only System with Fan
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
C 24VAC common [3]
W Heat relay
G Fan relay

Cool-only System
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
Y Compressor contactor
C 24VAC common [3]
G Fan relay

2H/2C System (1 transformer) [6]
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
Y Compressor contactor (stage 1)
C 24VAC common [3]
W Heat relay (stage 1)
G Fan relay
W2 Heat relay (stage 2)
Y2 Compressor contactor (stage 2)

NOTES


Wire specifications: Use 18- to 22-gauge thermostat wire. Shielded cable is not required.

  1. Power supply. Provide disconnect means and overload protection as required.
  2. Move R-Slider Tab on UWP to the R setting. For more information, see “Setting Slider Tabs” on page 3
  3. Optional 24VAC common connection.
  4. Common connection must come from cooling transformer.
  5. In ISU set Heat system type to Radiant Heat. Set number of cool stages to 0.
  6. In Installer Setup, set system type to 2Heat/2Cool Conventional

Wiring heat pump systems
Shaded areas below apply only to TH6320U/TH6220U or as otherwise noted.

1H/1C Heat Pump System
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
Y Compressor contactor
C 24VAC common [3]
O/B Changeover valve [7]
G Fan relay

2H/1C Heat Pump System [8]
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
Y Compressor contactor
C 24VAC common [3]
O/B Changeover valve [7]
G Fan relay
Aux Auxiliary heat
E Emergency heat relay
L Heat pump fault input

2H/2C Heat Pump System [9]
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
Y Compressor contactor (stage 1)
C 24VAC common [3]
O/B Changeover valve [7]
G Fan relay
Y2 Compressor contactor (stage 2)
L Heat pump fault input

3H/2C Heat Pump System
(TH6320U only) [10]
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
Y Compressor contactor (stage 1)
C 24VAC common [3]
O/B Changeover valve [7]
G Fan relay
Aux Auxiliary heat
E Emergency heat relay
Y2 Compressor contactor (stage 2)
L Heat pump fault input

Dual Fuel System
R Power [1]
Rc [R+Rc joined by Slider Tab] [2]
Y Compressor contactor (stage 1)
C 24VAC common [3]
O/B Changeover valve [7]
G Fan relay
Aux Auxiliary heat
E Emergency heat relay
Y2 Compressor contactor (stage 2 – if needed)
L Heat pump fault input
S Outdoor sensor
S Outdoor sensor

NOTES
Wire specifications: Use 18- to 22-gauge thermostat wire. Shielded cable is not required.

  1. Power supply. Provide disconnect means and overload protection as required.
  2. Move R-Slider Tab on UWP to the R setting. For more information, see “Setting Slider Tabs” on page 3
  3. Optional 24VAC common connection.
  4. In Installer Setup, set system type to 2Heat/2Cool Conventional.
  5. In Installer Setup, set changeover valve to O (for cool changeover) or B (for heat changeover).
  6. In ISU set Heat system type to Heat pump. 1 compressor and 1 stage of backup heat.
  7. In ISU set Heat system type to Heat pump. 2 compressors and 0 stage of backup heat.
  8. In ISU set Heat system type to Heat pump. 2 compressors and 1 stage of backup heat.

Thermostat mounting

Thermostat mounting
  1. Push excess wire back into the wall opening.
  2. Close the UWP door. It should remain closed without bulging.
  3. Align the UWP with the thermostat, and push gently until the thermostat snaps in place.
  4. Turn the power on at the breaker box or switch.

System operation settings

System operation settings
  1. Press the Mode button to cycle to the next available System mode.
  2. Cycle through the modes until the required System mode is displayed and leave it to activate.

NOTE: Available System modes vary by model and system settings.

System modes:
‒‒ Auto
‒‒ Heat
‒‒ Cool
‒‒ Em Heat
‒‒ Off

Fan operation settings

Fan operation settings
  1. Press the Fan button to cycle to the next available Fan mode.
  2. Cycle through the modes until the required Fan mode is displayed and leave it to activate.

NOTE: Available Fan modes vary with system settings.

Fan modes:
‒‒ Auto: Fan runs only when the heating or cooling system is on.
‒‒ On: Fan is always on.
‒‒ Circ: Fan runs randomly about 33% of the time.

Installer setup (ISU)

Installer setup (ISU)
  1. Press and hold CENTER and + buttons for approximately 3 seconds to enter advanced menu.
  2. Press Select to enter ISU.
  3. Press Select to cycle through menu setup options.
  4. Press + or – to change values or select from available options.
  5. Press Select and confirm your settings or press Back to ignore changes and return to ISU menu screen to continue editing another setup option.
  6. To finish setup process and save your setting, press Home and return to Home screen.

NOTE: A complete list of all setup (ISU) parameters and options starts below and continues through page 10.

Advanced setup options (ISU)


NOTE: Depending on system settings, not all options may be available.

Advanced setup options ISU
Advanced setup options

Installer system test


To perform a System Test:

Installer system test
  1. Press and hold CENTER and + buttons for approximately 3 seconds to enter advanced menu.
  2. Use + to go to TEST. Press Select to enter System Test.
  3. Use + to change between Heat, Cool, Fan, Em Heat, or Ver (thermostat version information). Press Select.
  4. Press + to turn stages on one at a time, and press to turn them off.
  5. Use the Home button to exit the System Test.

System test System status
Shaded areas below apply only to TH6320U/TH6220U or as otherwise noted.

Default security code

The default security code for the Honeywell Pro Series thermostat is 1234

Heat

0 All Off
1 Heat Stage 1 on
2 Heat Stage 2 also on
3 Heat Stage 3 also on

 

Cool
0 All Off
1 Cool Stage 1 on
2 Cool Stage 2 also on

Em Heat
0 All Off
1 Em Heat on

Fan
0 Fan Off
1 Fan On

Specifications

 

Temperature Ranges
Heat: 40 °F to 90 °F (4.5 °C to 32.0 °C)
Cool: 50 °F to 99 °F (10.0 °C to 37.0 °C)
Working Ambient Temperature
32 °F to 120 °F (0 C° to 48.9 °C)
Operating Ambient Temperature
37 °F to 102 °F (2.8 °C to 38.9 °C)
Shipping Temperature
-20 °F to 120 °F (-28.9 °C to 48.9 °C)
Operating Relative Humidity
5% to 90% (non-condensing)
Physical Dimensions in inches (mm) (H x W x D)
4-1/16” H x 4-1/16” W x 1-5/32” D
103.5 mm H x 103.5 mm W x 29 mm D

Electrical Ratings

Electrical Ratings

CAUTION: ELECTRICAL HAZARD
Can cause electrical shock or equipment damage. Disconnect power before
beginning installation.

CAUTION: EQUIPMENT DAMAGE HAZARD
Compressor protection is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly.

CAUTION: MERCURY NOTICE
If this product is replacing a control that contains mercury in a sealed tube, do not place the old control in the trash. Contact your local waste management authority for instructions regarding recycling and proper disposal.

Pull to remove the thermostat from the UWP

Pull to remove the thermostat

Customer assistance

For assistance with this product, please visit
customer.honeywell.com.
Or call Honeywell Customer Care toll-free at
1-800-468-1502.

Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
customer.honeywell.com
® U.S. Registered Trademark.
© 2016 Honeywell International Inc.
33-00181EFS—01 M.S. 06-16
Printed in U.S.A.
Printed in U.S.A.

Questions about your Manual? Post in the comments!

Join the Conversation

77 Comments

  1. 2 things.

    1. The Auto system mode doesn’t show up. How can I get it there?

    2. I’m inadvertently switching from permanent hold to temporary hold but I can’t figure out how.

  2. Thermostat not working. No power. Screen is blank. Was working a few days ago. Circuit breakers not tripped.

      1. See the 4 numbers in the back, get those and add 1234 and it should unlock it. For ex: 1111+1234=2345

    1. EM Heat refers to ‘Emergency Heat’ – it engages the built-in electric heater when the more efficient ‘heat-pump’ is not working or it is too cold to efficiently use the heat-pump. Under non-EM-heat conditions, your heater runs the air conditioner in reverse to provide efficient, low-cost heat. When the temperature is below 25 to 30 degrees outside, you may need to use the EM heat option.

  3. Good evening, some of the screen options are missing how can I get it back?

    Also how can I turn on the heat?

  4. What do you it mean when you see a warning sign on your thermostat, Honeywell pro series

  5. I thought programmable thermostat would allow setting daily temperature ranges for different time ranges during the day, but honeywell home pro series doesn’t offer that???

    1. It does, you have to use the advance setup potion in your manual and change the schedule setting to 7 day programmable.

  6. Heat doesn’t send out hot air unless the water is running? Not sure what the issue could be. Sometimes “Heat On” blinks and shits down, sometimes it just stays solid And sends out cold air.

    1. You may want to try EM-Heat mode. If there is a failure with your heat-pump system, EM heat mode will work to provide heat via electric direct heating — though this can be more expensive to run all season.

      1. I tried that and it didn’t work. I tried 1111. That didn’t work either. HELP!

      2. Hi Greg, I am also unable to unlock, I see no screen to enter 1234 to unlock. How do I enter these numbers. Your help is appreciated, Joanne

  7. How do you open to replace batteries?? Also, had a power outage for 3.5 hours does that require resetting anything?

    1. From my manual: “When the low battery warning appears, press gently to loosen the thermostat and then carefully pull it from the wall mount. Insert fresh alkaline AA batteries and reinstall thermostat” I just did this. Pull unit from wall mount. Batteries are in the pulled off unit. Replace and push back on. What is not mentioned is then you need to run through the SELECT cycles. No need to change them, just run through them. It’ll go into “SAVE” and you should be done. Hope this helps.

    2. I have same question Jim. How do I open to change batteries. Did you get answer-don’t want to break something.

    1. This is my question too. Why is it running all the time? There must be a way for it to establish the temperature and then turn itself off.

  8. Kind of new to the heat pump and the thermostat.
    Which is the best most energy-efficient way for the
    fan to be used.Auto or circulation?

  9. My Honeywell ProSeries digital thermostat reads “Temporary Hold”; what is this and how do I get rid of it?

    1. Temporary Hold indicates the thermostat is temporarily holding the custom set temperature. After a period, it will return to the scheduled temperature.

  10. This is a brand new Coleman furnace with the Honeywell Home Pro Series thermostat. For some reason, the furnace is constantly running all the time. We set it to a set temperature and it will not stick. The furnace will run for about five minutes, stop for about 90 seconds, and then kick back on. This happens ALL DAY LONG.
    Is there a mode that I’m missing where it will just stay as is? I’m concerned something is wrong. The heat works fine; the furnace just won’t stop.

  11. Ours is set at 70. Our heat pump runs 8 mins ON then shuts OFF for 12 min and this cycle runs 24hrs a day and the thermostat doesn’t change from 70.

  12. I have two Honeywell thermostats in the house (one upstairs and one downstairs). The upstairs heat is working, but the downstairs heat won’t kick on when it should. Any recommendations for how to troubleshoot?

  13. There should be a button below the word ‘fan’ on the display, press it and it should toggle the selections..Fan Auto, Fan On and Fan Circ’…choose Fan Auto…this way the fan only comes on whenever the system calls for heat or a/c…’Fan On’ means the fan will run continuously.

  14. Do any of these questions ever get answered??
    Why does the system run when on Fan Auto and the room temperature is cooler than the thermostat setting? I have never had a thermostat operate this way.

  15. Can someone tell me if it is necessary to connect the transformer or just with the batteries it closes in contact?
    alguien me podra decir si es necesario conectar el trafo o solo con las pilas cierra en contacto?

  16. How can I turn off the air, it makes full ice

    Como puedo apagar el aire hace full hielo

  17. I have a triangle with an “!” In the middle of it on the screen and a low batter signal. Changed batteries and it stayed. Any idea what to do next? Honeywell pro series with 3 buttons on the front.

  18. Heat is not coming on temperature shows 19 I set it up to 23 but the heat didn’t come on i have Honeywell proseries thermostat please help thank you

  19. I have a brand new (just built our home and moved in 4 mths ago) Honeywell Pro Series No numbers like Pro 6 or 4, Just Pro Series). Went to turn on the AC, as it’s getting hot in TX now and it has a PIN number on it. We have no idea what it is nor how to take it off. We’ve read ALL of the directions on google on how to bypass the PIN numbers and none have worked. Last nite it was 86 in our bedroom. Its supposed to be hotter tonite. U have no support phone number. Can u please tell me how to either turn off the pin number, bypass it, or start fresh? Can u give me ur support phone number so you can walk me thru it? Again, the thermostat has no numbers (as in 6 or 4, its just plain Pro Series), so please don’t give us the directions on that thermostat)

  20. If I performed a factory reset on my t6 and now my air will not turn on on AUTO, I have to set it on ON to get cool air. What can I do to fix that?

  21. Above “Fan On or Fan Auto”, a triangle with exclamation point has appeared. I have only had this thermometer 8 months. Must be an error, but what dies it mean?

  22. How do I unlock?
    If I look in the back of the cover the 4 numbers are 1951
    If I add 1234 the number is 3185

    then what I do??
    How should I enter this number and where??/

    Thanks

  23. I have a Pro Series. It’s locked. No idea what the pin # is. I tried 1111 and 1234 as previous suggestions. I cannot take the cover off to find any info there. Can anyone help?

  24. I have the Honeywell Pro Series and the Fan is on Auto but continue to run all day please help to set this thermostat Please. What do I need to to correct this problem?

  25. Is there some way to calibrate the temperature sensor? The display (and corresponding actions) reads 3-4 degrees higher than the other thermometers I use for comparison.

  26. Somehow our thermostat is locked and asking for a pin number. I’ve tried all the ones suggested above and no joy. If I take the batteries out will that allow me to reset? (My husband has Alzheimer’s and I’m afraid that he’s tried to change the temperature and inadvertently set a pin which he, of course, doesn’t remember.)

    1. Update: I read Nazir Memon’s comment above and decided to try the same. The only 4 digit number on the back was 1925, I added 1234 to it, got 3159, put the thermostat box back on the wall, touched the screen, it asked for the pin, I entered the 3159 and we’re back in business!

  27. Why does ac work from 10 at night to 10 in the morning. ac seems to cut off half time each day. Is it programmed that way?

  28. I have a ! Inside a triangle beside my temperature setting, is that normal?
    Thank you

  29. I thought fan only meant the ac is not runing only the fan. Mine says fan only. Is this correct?

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