Honeywell T6 Pro TH6320ZW2007

[scenic thorn]

I am having an issue where sometimes the mode does not change when I press the physical mode button on the thermostat. It shows Heating but Off and its supposed to show Heating and the target temperature and the fire icon is supposed to be orange. Here are the two screen shots. To get the second screen shot I went into the app to move it to the fire icon.

At this point, I am trying find someone that knows what Z-Wave commands it is supposed to send to the HA hub that would properly change the mode to the second image as the first image shows the that HA does not update properly. I am looking for someone that can run zwave js ui debug on their thermostat that works properly so I can compare to mine.

[ocean fossil]

For some context, it looks like the Thermostat Operating State report is sometimes either not sent by the device or not received.
I proposed this automation to work around it by polling the operating state when the fan state is updated by the device (this seems more reliable), but I'm not sure how to poll a specific value ID using HA automations.

[shell pagoda]

You'd have to use invoke_cc_api action, or use refresh_all_values: true option for refresh (not recommended) as the operating state is not the climate entity's primary value. Example in another of OP's discussions on this topic: https://community.home-assistant.io/t/honeywell-t6-not-updating/974795/28?u=freshcoast

[harsh pilot]

Having no issues here, took that video without touching the thermostat in probably 6 months

Hardware:

• ZWA-2 with v1.2 firmware
• Honeywell T6 with v1.3 firmware

software:

• Zwave JS UI App 11.11.0
• Zwave JS 15.20.1

• HA v 2026.3.3

[scenic thorn]

@harsh pilot can you try it with the app on the phone swiped closed to force quit it, then change the mode on the T6, open the closed HA app and see if the mode updated?

[harsh pilot]

the video is using the app on the phone

[scenic thorn]

I know but close it by swiping up to force close the app, press the button on the T6 to change the mode, open the app to see if the mode on the app matches the mode on the T6.

[harsh pilot]

I can guarantee that works without even using the T6. At that point, the connection between the app and HA will only reads the state machine, meaning the hardware has no bearing on state in the UI.

[scenic thorn]

Sometimes when I press the T6 Mode button it updates the mode correctly and sometimes it doesn’t. Most often it doesn’t update the mode the first time when the app has been closed on the iPhone. Once the app has been launched it works every time.

[harsh pilot]

are you sure you're not just being bitten by a caching issue? You do realize that the frontend is a webpage and you need to refesh it sometimes

like, if leave the app open and go to something else, you typically need to refresh the page when you come back by swiping down.

it should automatically attempt to load

anyways, I'm home now so I'll take video

[shell pagoda]

It's already been established in other support threads that HA is not involved in the problem

Actually literally in this thread too

[scenic thorn]

Nabu Casa suggests: A workaround that's helped other T6 users is setting up an automation that periodically calls zwave_js.refresh_value with refresh_all_values: true on your thermostat entity. That forces HA to poll the device for its current state rather than waiting for the T6 to report it.

[shell pagoda]

Correct, that's been proposed multiple times, including #1484649674009870506 message

[scenic thorn]

in that post, you say the refresh is not recommended?

[shell pagoda]

It's inefficient

but it would work

The Zniffer route is the only way to prove that the device is sending a command (or not) and Z-Wave JS (not HA) is not seeing it. I don't know what your timezone is but Al is in EU so any assistance there would probably have delays, in short you'll have to have some patience. You can also start a dedicated thread in the Z-Wave JS Discord if you want something more conversational than GitHub discussions.

[scenic thorn]

That is good idea. I need to get the Zniffer working but I am not following his instructions.

[scenic thorn]

When you say cache, is it using the Safari app on the iPhone for caching?

[scenic thorn]

I have searched for Z-wave JS here and cannot find it. Can you point me in the right direction?