Integration setup failing with: No module named 'aio_panasonic_comfort_cloud'

[Msprg]

Checklist

• I have verified that the account and device works in the Comfort Cloud App.
• This issue only contains 1 issue (if you have multiple issues, open one issue for each issue).
• This issue is not a duplicate issue of currently previous issues..

What version of Home Assistant Core?

core-2026.3.2

Describe the issue

Looks like since the march hass core update, the integration wasn't being set up properly anymore for me. See the error log.

Error/Debug Logs

Logger: homeassistant.setup
Source: setup.py:343
First occurred: 13:02:31 (1 occurrence)
Last logged: 13:02:31

Setup failed for custom integration 'panasonic_cc': Unable to import component: No module named 'aio_panasonic_comfort_cloud'
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/setup.py", line 343, in _async_setup_component
    component = await integration.async_get_component()
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1043, in async_get_component
    self._component_future.result()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1023, in async_get_component
    comp = await self.hass.async_add_import_executor_job(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        self._get_component, True
        ^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/local/lib/python3.14/concurrent/futures/thread.py", line 86, in run
    result = ctx.run(self.task)
  File "/usr/local/lib/python3.14/concurrent/futures/thread.py", line 73, in run
    return fn(*args, **kwargs)
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1083, in _get_component
    ComponentProtocol, importlib.import_module(self.pkg_path)
                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/util/loop.py", line 201, in protected_loop_func
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.14/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1398, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1371, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1342, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 938, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 759, in exec_module
  File "<frozen importlib._bootstrap>", line 491, in _call_with_frames_removed
  File "/config/custom_components/panasonic_cc/__init__.py", line 16, in <module>
    from aio_panasonic_comfort_cloud import ApiClient
ModuleNotFoundError: No module named 'aio_panasonic_comfort_cloud'

[Msprg]

For anyone else experiencing this issue, you can try applying the following patch that fixed the issue for me:

Expand to see the patch file contents

--- a/custom_components/panasonic_cc/__init__.py
+++ b/custom_components/panasonic_cc/__init__.py
@@ -13,6 +13,11 @@
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 from homeassistant.loader import async_get_integration
+
+from .deps import ensure_dependencies
+
+ensure_dependencies()
+
 from aio_panasonic_comfort_cloud import ApiClient
 from aioaquarea import Client as AquareaApiClient, AquareaEnvironment
 
--- a/custom_components/panasonic_cc/deps.py
+++ b/custom_components/panasonic_cc/deps.py
@@ -0,0 +1,100 @@
+"""Dependency bootstrap for Panasonic Comfort Cloud."""
+
+from __future__ import annotations
+
+import importlib
+import logging
+import subprocess
+import sys
+from pathlib import Path
+from threading import Lock
+
+_LOGGER = logging.getLogger(__name__)
+
+_DEPS_DIR = Path("/config/deps")
+_REQUIREMENTS = (
+    "aio-panasonic-comfort-cloud==2025.5.1",
+    "aioaquarea==0.7.2",
+)
+_MODULES = (
+    "aio_panasonic_comfort_cloud",
+    "aioaquarea",
+)
+_LOCK = Lock()
+_READY = False
+
+
+def _add_deps_path() -> None:
+    """Add the shared Home Assistant deps directory to sys.path."""
+    deps_path = str(_DEPS_DIR)
+    if deps_path not in sys.path:
+        sys.path.insert(0, deps_path)
+
+
+def _missing_modules() -> list[str]:
+    """Return the external modules that are still missing."""
+    missing: list[str] = []
+    for module_name in _MODULES:
+        try:
+            importlib.import_module(module_name)
+        except ModuleNotFoundError:
+            missing.append(module_name)
+    return missing
+
+
+def ensure_dependencies() -> None:
+    """Install external dependencies when Home Assistant does not."""
+    global _READY
+
+    if _READY:
+        return
+
+    with _LOCK:
+        if _READY:
+            return
+
+        _DEPS_DIR.mkdir(parents=True, exist_ok=True)
+        _add_deps_path()
+
+        missing = _missing_modules()
+        if not missing:
+            _READY = True
+            return
+
+        _LOGGER.warning(
+            "Missing Panasonic Comfort Cloud dependencies %s. "
+            "Attempting local install into %s.",
+            ", ".join(missing),
+            _DEPS_DIR,
+        )
+        result = subprocess.run(
+            [
+                sys.executable,
+                "-m",
+                "pip",
+                "install",
+                "--no-cache-dir",
+                "--target",
+                str(_DEPS_DIR),
+                *_REQUIREMENTS,
+            ],
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+        if result.returncode != 0:
+            raise ModuleNotFoundError(
+                "Unable to install Panasonic Comfort Cloud dependencies. "
+                f"stdout: {result.stdout[-1000:]}, stderr: {result.stderr[-1000:]}"
+            )
+
+        _add_deps_path()
+        missing = _missing_modules()
+        if missing:
+            raise ModuleNotFoundError(
+                "Panasonic Comfort Cloud dependencies are still missing after install: "
+                + ", ".join(missing)
+            )
+
+        _READY = True
+

git apply ./panasonic_cc-deps.patch

Remember to restart your home assistant afterwards.