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[goingforstudying-ctrl](/goingforstudying-ctrl)wants to merge 3 commits into

[fix(smartthings): avoid race when turning on Samsung AC before setting mode](#top)#173465[goingforstudying-ctrl](/goingforstudying-ctrl) wants to merge 3 commits into

[fix(smartthings): avoid race when turning on Samsung AC before setting mode](#top)#173465

[goingforstudying-ctrl](/goingforstudying-ctrl)wants to merge 3 commits into

Conversation #

Breaking change #

Proposed change #

When turning a Samsung AC from OFF to COOL (or any mode), async_set_hvac_mode

gathers async_turn_on() and SET_AIR_CONDITIONER_MODE

together. Some AC units reject the mode command while still transitioning from OFF, causing a SmartThingsCommandError

with BAD_REQUEST.

The fix awaits turn_on

first, then sends the mode command sequentially. async_set_temperature

was also updated to avoid a double ON when both temp and mode change while the device is off.

Type of change #

• Dependency upgrade

- Bugfix (non-breaking change which fixes an issue)
- New integration (thank you!)

• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information #

- This PR fixes or closes issue: fixes
[[BUG] SmartThings climate show error when turn on #172410](https://github.com/home-assistant/core/issues/172410) - This PR is related to issue:
[SmartThings climate show error when turn on #124336](https://github.com/home-assistant/core/issues/124336) - Link to documentation pull request:

• Link to developer documentation pull request:

• Link to frontend pull request:

Checklist #

• I understand the code I am submitting and can explain how it works.
• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass - There is no commented out code in this PR.
• I have followed the

[development checklist](https://developers.home-assistant.io/docs/development_checklist/) - I have followed the
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ruff format homeassistant tests

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• Any generated code has been carefully reviewed for correctness and compliance with project standards.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for

[www.home-assistant.io](https://github.com/home-assistant/home-assistant.io)

If the code communicates with devices, web services, or third-party tools:

• The manifest filehas all fields filled out correctly.

Updated and included derived files by running:python3 -m script.hassfest

. - New or updated dependencies have been added to requirements_all.txt

.

Updated by running:python3 -m script.gen_requirements_all

. - For the updated dependencies a diff between library versions and ideally a link to the changelog/release notes is added to the PR description.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requestsin this repository.

previously requested changes

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| Hey there ## Code owner commandsCode owners of |

| Please take a look at the requested changes, and use the |

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Pull request overview #

Note

Copilot was unable to run its full agentic suite in this review.

This PR converts concurrent command execution (asyncio.gather

) to sequential await

calls in the SmartThings climate integration to fix issues where Samsung AC units reject mode commands sent concurrently with the power on command.

Changes:

• Replaced asyncio.gather

with sequentialawait

inasync_set_hvac_mode

to ensure the device is powered on before sending mode changes. - Replaced asyncio.gather

with sequentialawait

inasync_set_temperature

, restructuring the control flow with an early return for the OFF case.

homeassistant/components/smartthings/climate.py

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June 10, 2026 21:36

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Pull request overview #

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Pull request overview #

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| The check is failing because this PR is missing one of the required labels (breaking-change, bugfix, code-quality, dependency, deprecation, new-feature, new-integration). Since this is a bug fix for a race condition, could a maintainer please add the label? Thanks! |

| Hi maintainers, two quick items: Thanks! |

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June 13, 2026 04:33

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| Did you read my last comment? |

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June 13, 2026 17:20

| Hi |

| Hi maintainers — this PR fixes a bug ( |

| Hi Now, could you please add the |

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| Hi maintainers, the prek check requires a type label to be set. This PR is a bugfix (race condition fix for Samsung AC). Could someone please add the |

|

AI Contribution Form #

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|

AI Contribution Form #

The PR itself is a straightforward bugfix (race condition fix for Samsung AC |

| |

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