diff --git a/CHANGELOG.md b/CHANGELOG.md
index df83c6e16..5e7f78b49 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@
 
 - Change representation of no-thermostat-schedule-defined to a single `off` option via PR [#899](https://github.com/plugwise/python-plugwise/pull/899)
 
+## v1.14.2
+
+- Implement common typing in functions that are interacting.
+
 ## v1.14.1
 
 - Improve manual fixtures script, reorder set_schedule_state() arguments for better compatibility with set_dhw_mode(), via PR[#897](https://github.com/plugwise/python-plugwise/pull/897)
diff --git a/plugwise/__init__.py b/plugwise/__init__.py
index 3fff9be68..f91308726 100644
--- a/plugwise/__init__.py
+++ b/plugwise/__init__.py
@@ -358,7 +358,7 @@ async def set_select(
         key: str,
         loc_id: str,
         option: str,
-        state: str | None = None,
+        state: int | str | None = None,
     ) -> None:
         """Set the selected option for the applicable Select."""
         try:
@@ -372,7 +372,7 @@ async def set_schedule_state(
         self,
         loc_id: str,
         name: str | None = None,
-        state: str | None = None,
+        state: int | str | None = None,
     ) -> None:
         """Activate/deactivate the Schedule, with the given name, on the relevant Thermostat."""
         try:
@@ -462,11 +462,7 @@ async def set_regulation_mode(self, mode: str) -> None:
             ) from exc  # pragma no cover
 
     async def set_dhw_mode(
-        self,
-        key: str,
-        location: str,
-        mode: str,
-        length: int,
+        self, key: str, location: str, mode: str, length: int | str | None = None
     ) -> None:
         """Set the domestic hot water heating regulation mode."""
         try:  # pragma no cover
@@ -474,7 +470,7 @@ async def set_dhw_mode(
                 key,
                 location,
                 mode,
-                length,
+                length=length,
             )  # pragma: no cover
         except ConnectionFailedError as exc:  # pragma no cover
             raise ConnectionFailedError(
diff --git a/plugwise/legacy/smile.py b/plugwise/legacy/smile.py
index 6b4399b54..4c5fbf7b7 100644
--- a/plugwise/legacy/smile.py
+++ b/plugwise/legacy/smile.py
@@ -136,7 +136,7 @@ async def set_dhw_mode(
         key: str,
         location: str,
         mode: str,
-        length: int,
+        length: int | str | None,
     ) -> None:
         """Set-function placeholder for legacy devices."""
 
@@ -178,7 +178,7 @@ async def set_select(
         _: str,
         loc_id: str,
         option: str,
-        state: str | None = None,
+        state: int | str | None = None,
     ) -> None:
         """Set the thermostat schedule option."""
         # schedule name corresponds to select option
@@ -188,7 +188,7 @@ async def set_schedule_state(
         self,
         _: str,
         name: str | None = None,
-        state: str | None = None,
+        state: int | str | None = None,
     ) -> None:
         """Activate/deactivate the Schedule.
 
diff --git a/plugwise/smile.py b/plugwise/smile.py
index 02508701a..e7a13aca7 100644
--- a/plugwise/smile.py
+++ b/plugwise/smile.py
@@ -236,7 +236,7 @@ async def set_select(
         key: str,
         appl_or_loc_id: str,
         option: str,
-        state: str | None = None,
+        state: int | str | None = None,
     ) -> None:
         """Set a dhw/gateway/regulation mode or the thermostat schedule option."""
         match key:
@@ -257,7 +257,7 @@ async def set_select(
                 await self.set_zone_profile(appl_or_loc_id, option)
 
     async def set_dhw_mode(
-        self, key: str, appl_id: str, mode: str, length: int
+        self, key: str, appl_id: str, mode: str, length: int | str | None = None
     ) -> None:
         """Set the domestic hot water mode.
 
@@ -265,8 +265,13 @@ async def set_dhw_mode(
         - 2 modes, comfort and off, representing the dhw comfort mode on and off switch states,
         - and the 5 modes available on the Loria.
         """
-        if self._dhw_allowed_modes and mode not in self._dhw_allowed_modes:
-            raise PlugwiseError("Plugwise: invalid dhw mode.")
+        if (
+            self._dhw_allowed_modes
+            and mode not in self._dhw_allowed_modes
+            or length is None
+            or not isinstance(length, int)
+        ):
+            raise PlugwiseError("Plugwise: invalid dhw mode or invalid dhw modes list.")
 
         match length:
             case 2:
@@ -346,7 +351,7 @@ async def set_zone_profile(self, loc_id: str, profile: str) -> None:
         await self.call_request(uri, method="post", data=data)
 
     async def set_schedule_state(
-        self, loc_id: str, name: str | None = None, state: str | None = None
+        self, loc_id: str, name: str | None = None, state: int | str | None = None
     ) -> None:
         """Activate/deactivate the Schedule, with the given name, on the relevant Thermostat.
 
diff --git a/pyproject.toml b/pyproject.toml
index a1092e395..722cab0ab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name            = "plugwise"
-version         = "1.14.1"
+version         = "1.14.2"
 license         = "MIT"
 description     = "Plugwise Smile (Adam/Anna/P1) and Stretch module for Python 3."
 readme          = "README.md"