Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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Have honeywell TH8320 how do i take out of

Have honeywell TH8320 how do i take out of permanet hold? i know how unlock screen already

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Press the "cancel" button on the screen. Remember to program the settings for heat and cool or you will just have to go for the "hold" again. Good luck

Posted on Sep 06, 2009


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I need to hook up my heating system to a honeywell th8320 up 1003 thermostat. Where can I find a wiring diagram for this unit?

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I have a Honeywell Thermostat 32207445-001 and the screen is blank. The cover indicates it may be a security feature. How do I reset the unit?

Did you try turning off the power to the unit. Also is there a lock on the thermostat. Check manual maybe you need to hold certain buttons to unlock.

Feb 08, 2011 | Honeywell Electronic Programmable...

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My thermostat is not working. It might be locked. It's blinking with all of the information it holds flashing on the screen. The part number is: tstatccnhp01-c My heat is no longer working. Can you...

  1. 1 Unlock a partially locked screen by pressing any locked key, which will bring up the "Screen Locked" message. Next press an unlocked key, which will likely be the temperature up and down arrow keys. This will unlock the screen.
  2. 2 Press the "System" key from the home screen. Five blank touch keys, flanked by the "Done" and "Cancel" keys, will appear. Hold down the middle key for about five seconds. The Advanced Settings menu should come up.
  3. 3 Change the User Setup Number, found in the bottom left of the screen, by pressing the middle arrow keys up or down. Set the number to "0670," the universal unlock code.
  4. 4 Turn to the arrow keys on the right side of the screen. Press the keys up or down to change your options. Selecting the number "0" will unlock the screen, while choosing "1" will partially lock it. You can fully lock your screen again by selecting.

Read more: How to Unlock the Screen on a Honeywell Thermostat '

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Colman evcon ''B'' relay connection on new programmable t/stat

Hello The B wire now goes to the O termnal on new thermostat.

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My honewell th8320 is reading error 126 or 626

Look in the manual that came with the thermostat it will give you the problem for each code.

Nov 11, 2009 | Honeywell Electronic Programmable...

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Only fan turning on ? model th8320

If you have not changed the configuration of hte thermostat, it will still try to operate as a programmable model. You can configure this thermostat as a non programmable type. If you have the manual for this thermostat, the process is located on page 22, if not, you can get a copy of it on my company website:
The file is TH8320.pdf just either click and it will open or right click and select save target.

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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

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