diff --git a/homeassistant/components/home_connect/select.py b/homeassistant/components/home_connect/select.py
index ef3e2ccbf82..527fd827399 100644
--- a/homeassistant/components/home_connect/select.py
+++ b/homeassistant/components/home_connect/select.py
@@ -413,6 +413,7 @@ class HomeConnectSelectEntity(HomeConnectEntity, SelectEntity):
     """Select setting class for Home Connect."""
 
     entity_description: HomeConnectSelectEntityDescription
+    _original_option_keys: set[str | None]
 
     def __init__(
         self,
@@ -421,6 +422,7 @@ class HomeConnectSelectEntity(HomeConnectEntity, SelectEntity):
         desc: HomeConnectSelectEntityDescription,
     ) -> None:
         """Initialize the entity."""
+        self._original_option_keys = set(desc.values_translation_key)
         super().__init__(
             coordinator,
             appliance,
@@ -471,10 +473,12 @@ class HomeConnectSelectEntity(HomeConnectEntity, SelectEntity):
                 )
 
         if setting and setting.constraints and setting.constraints.allowed_values:
+            self._original_option_keys = set(setting.constraints.allowed_values)
             self._attr_options = [
                 self.entity_description.values_translation_key[option]
-                for option in setting.constraints.allowed_values
-                if option in self.entity_description.values_translation_key
+                for option in self._original_option_keys
+                if option is not None
+                and option in self.entity_description.values_translation_key
             ]
 
 
@@ -491,7 +495,7 @@ class HomeConnectSelectOptionEntity(HomeConnectOptionEntity, SelectEntity):
         desc: HomeConnectSelectEntityDescription,
     ) -> None:
         """Initialize the entity."""
-        self._original_option_keys = set(desc.values_translation_key.keys())
+        self._original_option_keys = set(desc.values_translation_key)
         super().__init__(
             coordinator,
             appliance,
@@ -524,5 +528,5 @@ class HomeConnectSelectOptionEntity(HomeConnectOptionEntity, SelectEntity):
                 self.entity_description.values_translation_key[option]
                 for option in self._original_option_keys
                 if option is not None
+                and option in self.entity_description.values_translation_key
             ]
-            self.__dict__.pop("options", None)
diff --git a/tests/components/home_connect/test_select.py b/tests/components/home_connect/test_select.py
index 22ece365e6b..8ce91ed681c 100644
--- a/tests/components/home_connect/test_select.py
+++ b/tests/components/home_connect/test_select.py
@@ -521,9 +521,18 @@ async def test_select_functionality(
         (
             "select.hood_ambient_light_color",
             SettingKey.BSH_COMMON_AMBIENT_LIGHT_COLOR,
-            [f"BSH.Common.EnumType.AmbientLightColor.Color{i}" for i in range(50)],
+            [f"BSH.Common.EnumType.AmbientLightColor.Color{i}" for i in range(1, 50)],
             {str(i) for i in range(1, 50)},
         ),
+        (
+            "select.hood_ambient_light_color",
+            SettingKey.BSH_COMMON_AMBIENT_LIGHT_COLOR,
+            [
+                "A.Non.Documented.Option",
+                "BSH.Common.EnumType.AmbientLightColor.Color42",
+            ],
+            {"42"},
+        ),
     ],
 )
 async def test_fetch_allowed_values(
@@ -679,6 +688,17 @@ async def test_select_entity_error(
                 "laundry_care_washer_enum_type_temperature_ul_extra_hot",
             },
         ),
+        (
+            "select.washer_temperature",
+            OptionKey.LAUNDRY_CARE_WASHER_TEMPERATURE,
+            [
+                "A.Non.Documented.Option",
+                "LaundryCare.Washer.EnumType.Temperature.UlWarm",
+            ],
+            {
+                "laundry_care_washer_enum_type_temperature_ul_warm",
+            },
+        ),
     ],
 )
 async def test_options_functionality(