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How do I unlock honeywell t6 pro series? It is locked in a scheduled program that we are unsure where it came from and do not know how to get it back to the manual operation. HELP!

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A manual is what you need to unlock and reprogram the schedule. Keep off the set up steps for the thermostat, only the scheduling and security steps.

Posted on Sep 12, 2019

  • J Rosado Sep 12, 2019

    Take note of current settings before changing to a new setting, to revert, back step.



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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: wiring diagram to connect programmable Thermo to Heat Pump

I don't know if this will be helpful or not, but I just installed a new Honeywell and the Honeywell customer service guy helped me get the wires done correctly. The number is 800-468-1502.

Posted on Jan 05, 2009

  • 3 Answers

SOURCE: How to lock a Honeywell TB7220U Thermostat

With directions go to system. Then hold down 2 blanks on either side of middle for 30seconds this shows you Advanced settings . Read through and find the proper settings

Posted on Jul 04, 2009

  • 767 Answers

SOURCE: how can I remove the set program on my honeywell

Just set the temperature you want and then press hold and this will keep the temperature you want.

Posted on Mar 01, 2010

  • 742 Answers

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Posted on Jun 18, 2010

  • 48 Answers

SOURCE: White digital Honeywell Theromastat that is stuck

What model is it? example pro 5000, 6000, 8000 ext.

Posted on Feb 26, 2011

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Heat pump with Honeywell T6 Pro thermostat. It's programmed for 69 during day and 65 at night. But the Adaptive Intelligent Recovery causes the house to heat up about 90 minutes too early. Options

For the T6 Pro model, I found the installation manual; search for 33-00181.pdf. I pressed Menu and + for 3 seconds to get into Advanced Mode; then Select to enter ISU ("Installer Setup"); then Select several times to get to option 425 (Adaptive Intelligent Recovery). I then pressed "-" to make the setting zero (OFF); then pressed HOME to save the setting.

Dec 08, 2017 | Honeywell Heating & Cooling

1 Answer

I have my new Honeywell Pro series thermostat running on the "schedule" I set. But now I want to leave town and set it on PERMANENT HOLD at a lower temp. I cannot find a HOLD button anywhere.

you must enter the installer setup by pressing the center button and the + button simultaneously for three seconds. press select on ISU. Option 120 is the programming selector. 0 is no programming meaning you would be OFF your schedule. Take note of what it is now, you will have to do the same thing over again and change it back when you return. You can find all this info in the manual, best wishes.

If you need further help, reach me via phone at

Dec 01, 2017 | Honeywell Heating & Cooling

1 Answer

T6 pro Honeywell how two Heat and one cool

first you must be wired W AND W2 for heat and Y for cooling. then in your configuration you must setup for the like. That's what that manual is for!!!

If you need further help, reach me via phone at

Oct 08, 2017 | Honeywell Heating & Cooling

1 Answer

I have the Honeywell th6210u2001 t6 pro programmable thermostat. When I hit menu I get time, date, f/c, lock, but no prob to st up the program. What am I doing wrong.

You are not reading the manual. Even professionals have to read the manual. You likely are not in programming mode in the first place.

If you need further help, reach me via phone at

Jul 16, 2017 | Honeywell Heating & Cooling

1 Answer

My Honeywell T6 thermostat is locked and I cant unlock it?

Honeywell Customer Care toll-free at 1-800-468-1502. I read the owner/installation manual and there is no explanation. Try Honeywell direct. Have the model number when you call, located on the back of your t-stat. Hope this helps!

Jul 03, 2017 | Honeywell Heating & Cooling

1 Answer

Lost the Schedule Function How do i get it back? This is for the thermous stat TH8110U1003 Also need a copy of the User Guide How do I get one?

Well here is where you can get the manual for your Honeywell thermostat in PDF format

You should be able to press "cancel" or "sched" to bring back the schedule function. It will display "following schedule" on the right side of the display when the schedule is on. If you press "sched" then "edit" you can make changes to the programming schedule.

May 14, 2010 | Heating & Cooling

1 Answer

Permanent hold message on thermostat

press run program.... from there, set the schedule for maximum efficiency. permanent hold only shows up after the hold button has been pressed 2-3 times. If this does not fix the issue, there is a master reset button on the thermostat that will set all settings back to factory default.

Btw, I’m available to help over the phone in case u need at

May 16, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell VisionPro TH8000 touch screen will not allow changes to the schedule. Screen is unlocked and not in cleaning mode

In the set up mode are you sure the lock was not turned on. The set up mode has a different book for the installer. Do you have the book if not check with Honeywell or let me know.

Sep 27, 2008 | Heating & Cooling

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