diff --git a/homeassistant/components/lcn/binary_sensor.py b/homeassistant/components/lcn/binary_sensor.py
index 415668f5924..56a5ea6e646 100644
--- a/homeassistant/components/lcn/binary_sensor.py
+++ b/homeassistant/components/lcn/binary_sensor.py
@@ -2,10 +2,10 @@
 import pypck
 
 from homeassistant.components.binary_sensor import BinarySensorEntity
-from homeassistant.const import CONF_ADDRESS
+from homeassistant.const import CONF_ADDRESS, CONF_SOURCE
 
 from . import LcnEntity
-from .const import BINSENSOR_PORTS, CONF_CONNECTIONS, CONF_SOURCE, DATA_LCN, SETPOINTS
+from .const import BINSENSOR_PORTS, CONF_CONNECTIONS, DATA_LCN, SETPOINTS
 from .helpers import get_connection
 
 
diff --git a/homeassistant/components/lcn/climate.py b/homeassistant/components/lcn/climate.py
index ece3994f651..e3269a51cd6 100644
--- a/homeassistant/components/lcn/climate.py
+++ b/homeassistant/components/lcn/climate.py
@@ -3,7 +3,12 @@
 import pypck
 
 from homeassistant.components.climate import ClimateEntity, const
-from homeassistant.const import ATTR_TEMPERATURE, CONF_ADDRESS, CONF_UNIT_OF_MEASUREMENT
+from homeassistant.const import (
+    ATTR_TEMPERATURE,
+    CONF_ADDRESS,
+    CONF_SOURCE,
+    CONF_UNIT_OF_MEASUREMENT,
+)
 
 from . import LcnEntity
 from .const import (
@@ -12,7 +17,6 @@ from .const import (
     CONF_MAX_TEMP,
     CONF_MIN_TEMP,
     CONF_SETPOINT,
-    CONF_SOURCE,
     DATA_LCN,
 )
 from .helpers import get_connection
diff --git a/homeassistant/components/lcn/const.py b/homeassistant/components/lcn/const.py
index 821a7102154..3dcac6fb55f 100644
--- a/homeassistant/components/lcn/const.py
+++ b/homeassistant/components/lcn/const.py
@@ -25,7 +25,6 @@ CONF_LOCKABLE = "lockable"
 CONF_VARIABLE = "variable"
 CONF_VALUE = "value"
 CONF_RELVARREF = "value_reference"
-CONF_SOURCE = "source"
 CONF_SETPOINT = "setpoint"
 CONF_LED = "led"
 CONF_KEYS = "keys"
@@ -40,7 +39,6 @@ CONF_MAX_TEMP = "max_temp"
 CONF_MIN_TEMP = "min_temp"
 CONF_SCENES = "scenes"
 CONF_REGISTER = "register"
-CONF_SCENE = "scene"
 CONF_OUTPUTS = "outputs"
 CONF_REVERSE_TIME = "reverse_time"
 
diff --git a/homeassistant/components/lcn/light.py b/homeassistant/components/lcn/light.py
index 5242ed1cc59..8a76056ff46 100644
--- a/homeassistant/components/lcn/light.py
+++ b/homeassistant/components/lcn/light.py
@@ -166,7 +166,6 @@ class LcnRelayLight(LcnEntity, LightEntity):
 
     async def async_turn_on(self, **kwargs):
         """Turn the entity on."""
-
         states = [pypck.lcn_defs.RelayStateModifier.NOCHANGE] * 8
         states[self.output.value] = pypck.lcn_defs.RelayStateModifier.ON
         if not await self.device_connection.control_relays(states):
@@ -176,7 +175,6 @@ class LcnRelayLight(LcnEntity, LightEntity):
 
     async def async_turn_off(self, **kwargs):
         """Turn the entity off."""
-
         states = [pypck.lcn_defs.RelayStateModifier.NOCHANGE] * 8
         states[self.output.value] = pypck.lcn_defs.RelayStateModifier.OFF
         if not await self.device_connection.control_relays(states):
diff --git a/homeassistant/components/lcn/scene.py b/homeassistant/components/lcn/scene.py
index ed211473e29..1c359607fb2 100644
--- a/homeassistant/components/lcn/scene.py
+++ b/homeassistant/components/lcn/scene.py
@@ -4,14 +4,13 @@ from typing import Any
 import pypck
 
 from homeassistant.components.scene import Scene
-from homeassistant.const import CONF_ADDRESS
+from homeassistant.const import CONF_ADDRESS, CONF_SCENE
 
 from . import LcnEntity
 from .const import (
     CONF_CONNECTIONS,
     CONF_OUTPUTS,
     CONF_REGISTER,
-    CONF_SCENE,
     CONF_TRANSITION,
     DATA_LCN,
     OUTPUT_PORTS,
diff --git a/homeassistant/components/lcn/schemas.py b/homeassistant/components/lcn/schemas.py
index 1cc51f400da..5244bac3b6b 100644
--- a/homeassistant/components/lcn/schemas.py
+++ b/homeassistant/components/lcn/schemas.py
@@ -11,7 +11,9 @@ from homeassistant.const import (
     CONF_NAME,
     CONF_PASSWORD,
     CONF_PORT,
+    CONF_SCENE,
     CONF_SENSORS,
+    CONF_SOURCE,
     CONF_SWITCHES,
     CONF_UNIT_OF_MEASUREMENT,
     CONF_USERNAME,
@@ -32,11 +34,9 @@ from .const import (
     CONF_OUTPUTS,
     CONF_REGISTER,
     CONF_REVERSE_TIME,
-    CONF_SCENE,
     CONF_SCENES,
     CONF_SETPOINT,
     CONF_SK_NUM_TRIES,
-    CONF_SOURCE,
     CONF_TRANSITION,
     DIM_MODES,
     DOMAIN,
diff --git a/homeassistant/components/lcn/sensor.py b/homeassistant/components/lcn/sensor.py
index 4d4be5e1259..11932dccea8 100644
--- a/homeassistant/components/lcn/sensor.py
+++ b/homeassistant/components/lcn/sensor.py
@@ -1,12 +1,11 @@
 """Support for LCN sensors."""
 import pypck
 
-from homeassistant.const import CONF_ADDRESS, CONF_UNIT_OF_MEASUREMENT
+from homeassistant.const import CONF_ADDRESS, CONF_SOURCE, CONF_UNIT_OF_MEASUREMENT
 
 from . import LcnEntity
 from .const import (
     CONF_CONNECTIONS,
-    CONF_SOURCE,
     DATA_LCN,
     LED_PORTS,
     S0_INPUTS,
diff --git a/homeassistant/components/lcn/switch.py b/homeassistant/components/lcn/switch.py
index 6f9cc25db99..5fe624b04bf 100644
--- a/homeassistant/components/lcn/switch.py
+++ b/homeassistant/components/lcn/switch.py
@@ -117,7 +117,6 @@ class LcnRelaySwitch(LcnEntity, SwitchEntity):
 
     async def async_turn_off(self, **kwargs):
         """Turn the entity off."""
-
         states = [pypck.lcn_defs.RelayStateModifier.NOCHANGE] * 8
         states[self.output.value] = pypck.lcn_defs.RelayStateModifier.OFF
         if not await self.device_connection.control_relays(states):