diff --git a/.github/workflows/verify.yml b/.github/workflows/verify.yml
index 3cb21ec73..edc10bb31 100644
--- a/.github/workflows/verify.yml
+++ b/.github/workflows/verify.yml
@@ -102,7 +102,7 @@ jobs:
         if: failure()
         run: |
           . venv/bin/activate
-          ruff --fix plugwise/*py tests/*py
+          ruff check --fix plugwise/*py tests/*py
           git config --global user.name 'autoruff'
           git config --global user.email 'plugwise@users.noreply.github.com'
           git remote set-url origin https://x-access-token:${{ secrets.PAT_CT }}@github.com/$GITHUB_REPOSITORY
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 89ddfe092..533862cb9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## Ongoing
 
+- Combine set_temperature_offset() with set_number()
 - Fix typo in manual_fixtures.py script
 
 ## v0.37.3
diff --git a/plugwise/__init__.py b/plugwise/__init__.py
index 2f209ceed..cc886c27d 100644
--- a/plugwise/__init__.py
+++ b/plugwise/__init__.py
@@ -323,13 +323,14 @@ async def set_temperature(self, loc_id: str, items: dict[str, float]) -> None:
         """Set the given Temperature on the relevant Thermostat."""
         await self._smile_api.set_temperature(loc_id, items)
 
-    async def set_number_setpoint(self, key: str, _: str, temperature: float) -> None:
+    async def set_number(
+        self,
+        key: str,
+        temperature: float,
+        dev_id: str | None = None,
+    ) -> None:
         """Set the max. Boiler or DHW setpoint on the Central Heating boiler."""
-        await self._smile_api.set_number_setpoint(key, temperature)
-
-    async def set_temperature_offset(self, _: str, dev_id: str, offset: float) -> None:
-        """Set the Temperature offset for thermostats that support this feature."""
-        await self._smile_api.set_temperature_offset(dev_id, offset)
+        await self._smile_api.set_number(key, temperature, dev_id)
 
     async def set_switch_state(
         self, appl_id: str, members: list[str] | None, model: str, state: str
diff --git a/plugwise/legacy/smile.py b/plugwise/legacy/smile.py
index 42c35ad5a..d3277ed04 100644
--- a/plugwise/legacy/smile.py
+++ b/plugwise/legacy/smile.py
@@ -154,7 +154,12 @@ async def set_dhw_mode(self, mode: str) -> None:
     async def set_gateway_mode(self, mode: str) -> None:
         """Set-function placeholder for legacy devices."""
 
-    async def set_number_setpoint(self, key: str, temperature: float) -> None:
+    async def set_number(
+        self,
+        key: str,
+        temperature: float,
+        dev_id: str | None,
+    ) -> None:
         """Set-function placeholder for legacy devices."""
 
     async def set_preset(self, _: str, preset: str) -> None:
@@ -268,6 +273,3 @@ async def set_temperature(self, _: str, items: dict[str, float]) -> None:
         )
 
         await self._request(uri, method="put", data=data)
-
-    async def set_temperature_offset(self, dev_id: str, offset: float) -> None:
-        """Set-function placeholder for legacy devices."""
diff --git a/plugwise/smile.py b/plugwise/smile.py
index eb913fb5a..6437ba47e 100644
--- a/plugwise/smile.py
+++ b/plugwise/smile.py
@@ -182,8 +182,17 @@ async def set_gateway_mode(self, mode: str) -> None:
 
         await self._request(uri, method="put", data=data)
 
-    async def set_number_setpoint(self, key: str, temperature: float) -> None:
-        """Set the max. Boiler or DHW setpoint on the Central Heating boiler."""
+    async def set_number(
+        self,
+        key: str,
+        temperature: float,
+        dev_id: str | None,
+    ) -> None:
+        """Set the maximum boiler- or DHW-setpoint on the Central Heating boiler or the temperature-offset on a Thermostat."""
+        if dev_id is not None:
+            await self.set_offset(dev_id, temperature)
+            return
+
         temp = str(temperature)
         thermostat_id: str | None = None
         locator = f'appliance[@id="{self._heater_id}"]/actuator_functionalities/thermostat_functionality'
@@ -199,6 +208,19 @@ async def set_number_setpoint(self, key: str, temperature: float) -> None:
         data = f"<thermostat_functionality><setpoint>{temp}</setpoint></thermostat_functionality>"
         await self._request(uri, method="put", data=data)
 
+    async def set_offset(self, dev_id: str, offset: float) -> None:
+        """Set the Temperature offset for thermostats that support this feature."""
+        if dev_id not in self.therms_with_offset_func:
+            raise PlugwiseError(
+                "Plugwise: this device does not have temperature-offset capability."
+            )
+
+        value = str(offset)
+        uri = f"{APPLIANCES};id={dev_id}/offset;type=temperature_offset"
+        data = f"<offset_functionality><offset>{value}</offset></offset_functionality>"
+
+        await self._request(uri, method="put", data=data)
+
     async def set_preset(self, loc_id: str, preset: str) -> None:
         """Set the given Preset on the relevant Thermostat - from LOCATIONS."""
         if (presets := self._presets(loc_id)) is None:
@@ -410,16 +432,3 @@ async def set_temperature(self, loc_id: str, items: dict[str, float]) -> None:
         )
 
         await self._request(uri, method="put", data=data)
-
-    async def set_temperature_offset(self, dev_id: str, offset: float) -> None:
-        """Set the Temperature offset for thermostats that support this feature."""
-        if dev_id not in self.therms_with_offset_func:
-            raise PlugwiseError(
-                "Plugwise: this device does not have temperature-offset capability."
-            )
-
-        value = str(offset)
-        uri = f"{APPLIANCES};id={dev_id}/offset;type=temperature_offset"
-        data = f"<offset_functionality><offset>{value}</offset></offset_functionality>"
-
-        await self._request(uri, method="put", data=data)
diff --git a/scripts/tests_and_coverage.sh b/scripts/tests_and_coverage.sh
index 135b8bc49..3b9eca688 100755
--- a/scripts/tests_and_coverage.sh
+++ b/scripts/tests_and_coverage.sh
@@ -36,7 +36,7 @@ fi
 if [ -z "${GITHUB_ACTIONS}" ] || [ "$1" == "linting" ] ; then
     # Black first to ensure nothings roughing up ruff
     echo "... ruff-ing ..."
-    ruff plugwise/ tests/
+    ruff check plugwise/ tests/
 
     echo "... pylint-ing ..." 
     pylint plugwise/ tests/
diff --git a/tests/test_init.py b/tests/test_init.py
index a7c7d8f14..94e489248 100644
--- a/tests/test_init.py
+++ b/tests/test_init.py
@@ -873,11 +873,10 @@ async def tinker_regulation_mode(smile):
     async def tinker_max_boiler_temp(smile):
         """Change max boiler temp setpoint to test functionality."""
         new_temp = 60.0
-        dev_id = None
         _LOGGER.info("- Adjusting temperature to %s", new_temp)
         for test in ["maximum_boiler_temperature", "bogus_temperature"]:
             try:
-                await smile.set_number_setpoint(test, dev_id, new_temp)
+                await smile.set_number(test, new_temp)
                 _LOGGER.info("  + tinker_max_boiler_temp worked as intended")
             except pw_exceptions.PlugwiseError:
                 _LOGGER.info("  + tinker_max_boiler_temp failed as intended")
@@ -888,7 +887,7 @@ async def tinker_temp_offset(smile, dev_id):
         new_offset = 1.0
         _LOGGER.info("- Adjusting temperature offset to %s", new_offset)
         try:
-            await smile.set_temperature_offset("dummy", dev_id, new_offset)
+            await smile.set_number("dummy", new_offset, dev_id=dev_id)
             _LOGGER.info("  + tinker_temp_offset worked as intended")
             return True
         except pw_exceptions.PlugwiseError: