How to Unlock Honeywell Thermostat? (For All Series)

Last updated on April 12th, 2024

Honeywell thermostats come with a lock feature so any random person cannot change the temperature. If you have naughty kids, you must be thankful for this particular feature. Offices where some prefer it cold while others prefer it a little warm always have that temperature debate going on. In such a case, you can just put a lock on your Honeywell thermostat.

Locking is fine. But to change the temperature, you must unlock the thermostat. But how to unlock the Honeywell thermostat? We are going to discuss that in detail.

But before we begin, you must know what series your thermostat belongs to.

Identify the Honeywell thermostat series

To successfully unlock the Honeywell thermostat, you must know what series it belongs to because different series have different procedures for unlocking them.

They don’t have their model number engraved on the front panel. So, you can’t figure out your series from there. But, if you find your user manual or open the app for your Wi-Fi thermostat, you could get the model number.

If you don’t have access to either, you have to check the model number engraved on the back of the panel.

  • Slide the switch from heating/cooling to off and then unmount the panel.
  • On the back of the panel, you will find a small sticker with a bunch of information.
  • Somewhere in that sticker is your model number. Note it down and put the panel back on.
  • Don’t forget to turn on the thermostat.

The table below will give you a better idea as to which model belongs to which series.

Honeywell thermostat seriesModels coming under the series
1000 SeriesTH1100DV, TH1110DV, TH1210DV
2000 SeriesTH2110DV, TH2210DV
3000 SeriesTH3110D, TH3210D
4000 SeriesTH4210D, TH4110D
5000 SeriesTH5110D, TH5220D, TH5320U
6000 SeriesTH6110D, TH6220D, TH6320U
8000 SeriesTH8110U, TH8320U, TH8321U
Round SeriesLyric Round
Honeywell thermostat models with different series

Now that you have the model number, you can tell which series your thermostat belongs to. Suppose your model number is RTH6500WF. Then, it belongs to the 6000 series. Or if it is RTH8500WF, then it belongs to the 8000 series of thermostats.

After successfully identifying the series, you can select the right process from below to unlock Honeywell thermostat.

Procedure to unlock the thermostat

If you want to change the thermostat settings or temperature, then you must unlock the device that you have locked. And for that, you need a password. The person who has set the lock has the password. Once you have the password, you can unlock Honeywell thermostat.

1. Honeywell 8000 series thermostat

Steps to unlock a Honeywell 8000 series thermostat
Steps to unlock a Honeywell 8000 series thermostat

To unlock Honeywell thermostats belonging to the 8000 series, follow the step-by-step procedure given below.

Step 1: Press and hold the ‘System’ and ‘Auto’ buttons simultaneously on the 8000 series thermostat.

Step 2: Then press and hold the blank key in the center until the display changes.

Step 3: Now, enter the pin 0670 on the screen.

Use the ‘+’ button to increase a number and the ‘-‘ button to decrease a number. On entering a correct number, press the ‘Select’ button, and you will be forwarded to the next digit. Likewise, enter all the four digits correctly.

Step 4: When all four digits are entered, press the ‘Done’ button.

Your 8000 series thermostat is now unlocked.

2. Honeywell Pro series thermostat

Steps to unlock a Honeywell Pro series thermostat
Steps to unlock a Honeywell Pro series thermostat

The procedure to unlock Honeywell thermostats from the Pro series is also very similar. This process is common for T4 Pro and T6 Pro thermostats.

Step 1: Locate the unlock button on the center of the device and press it.

Step 2: Now, enter the pin 1234 for the Pro series.

Use the ‘+’ button to increase a number and the ‘-‘ button to decrease a number. On entering a correct number, press the ‘Select’ button, and you will be forwarded to the next digit. Likewise, enter all the four digits correctly.

Step 3: When you have entered all four digits correctly, press the ‘Select’ button again.

Your Pro series thermostat should be unlocked.

What happens if you enter an incorrect password?

If you enter an incorrect password on your thermostat, the screen will show ‘––’ such two dashes on the screen. You can enter the correct password by repeating the entire procedure given above fa or particular series. If you enter an incorrect password multiple times, you can lock the system temporarily.

You won’t be allowed to enter the password for some time until the auto lock is lifted. You have to wait till the unlock option is available again to change the temperature on your thermostat.

Conclusion

Unlocking a Honeywell thermostat is simple if you know the pin. The pins are already set, as discussed above. So you can just look up the model number on the internet to get the correct pin. Entering the pin is a task as you have to repeatedly press the +/– buttons to get the desired number.

Overall, it is pretty straightforward. But not straightforward enough that a child will be able to unlock it and change the settings. It pretty world as an excellent child lock feature.

FAQs

What is the default code for the Honeywell thermostat?

The default code for Honeywell 8000 series thermostats is 0670, and for all other series, it is 1234.

Can I change the password of my Honeywell thermostat?

Only a few Honeywell thermostat models allow you to change the password. You can refer to the user manual to know if your thermostat model allows you to change the password.

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Siddhi Gurav

She is the editor and content writer at Smart Home Bulls. Siddhi merges her passion for language with SEO expertise. With 4 years of experience as a creative writer and a passion for smart home technology, she fits in perfectly at Smart Home Bulls. Her wide experience in content marketing has been an excellent addition to our team.

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