diff --git a/homeassistant/components/lg_thinq/binary_sensor.py b/homeassistant/components/lg_thinq/binary_sensor.py
index aeade4d132a..61b600037a7 100644
--- a/homeassistant/components/lg_thinq/binary_sensor.py
+++ b/homeassistant/components/lg_thinq/binary_sensor.py
@@ -76,7 +76,8 @@ BINARY_SENSOR_DESC: dict[ThinQProperty, ThinQBinarySensorEntityDescription] = {
     ),
     ThinQProperty.WATER_HEATER_OPERATION_MODE: ThinQBinarySensorEntityDescription(
         key=ThinQProperty.WATER_HEATER_OPERATION_MODE,
-        translation_key="operation_mode",
+        device_class=BinarySensorDeviceClass.POWER,
+        translation_key=ThinQProperty.WATER_HEATER_OPERATION_MODE,
         on_key="power_on",
     ),
     ThinQProperty.ONE_TOUCH_FILTER: ThinQBinarySensorEntityDescription(
diff --git a/homeassistant/components/lg_thinq/icons.json b/homeassistant/components/lg_thinq/icons.json
index db33106da79..787b50167c1 100644
--- a/homeassistant/components/lg_thinq/icons.json
+++ b/homeassistant/components/lg_thinq/icons.json
@@ -80,6 +80,9 @@
       },
       "one_touch_filter": {
         "default": "mdi:air-filter"
+      },
+      "water_heater_operation_mode": {
+        "default": "mdi:power"
       }
     },
     "climate": {
diff --git a/homeassistant/components/lg_thinq/strings.json b/homeassistant/components/lg_thinq/strings.json
index 359ac40e1f1..a930860aa35 100644
--- a/homeassistant/components/lg_thinq/strings.json
+++ b/homeassistant/components/lg_thinq/strings.json
@@ -105,6 +105,12 @@
       },
       "one_touch_filter": {
         "name": "Fresh air filter"
+      },
+      "water_heater_operation_mode": {
+        "name": "[%key:component::binary_sensor::entity_component::power::name%]",
+        "state": {
+          "off": "[%key:common::state::standby%]"
+        }
       }
     },
     "climate": {
@@ -264,10 +270,10 @@
         "name": "{location} schedule turn-on"
       },
       "relative_hour_to_start_wm": {
-        "name": "Delay starts in"
+        "name": "Delayed start"
       },
       "relative_hour_to_start_wm_for_location": {
-        "name": "{location} delay starts in"
+        "name": "{location} delayed start"
       },
       "relative_hour_to_stop": {
         "name": "Schedule turn-off"
@@ -276,10 +282,10 @@
         "name": "{location} schedule turn-off"
       },
       "relative_hour_to_stop_wm": {
-        "name": "Delay ends in"
+        "name": "Delayed end"
       },
       "relative_hour_to_stop_wm_for_location": {
-        "name": "{location} delay ends in"
+        "name": "{location} delayed end"
       },
       "sleep_timer_relative_hour_to_stop": {
         "name": "Sleep timer"
@@ -927,6 +933,7 @@
         "state": {
           "cancel": "[%key:component::lg_thinq::entity::sensor::current_state::state::cancel%]",
           "power_off": "Power off",
+          "power_on": "Power on",
           "preheating": "Preheating",
           "start": "[%key:common::action::start%]",
           "stop": "[%key:common::action::stop%]",
@@ -938,6 +945,7 @@
         "state": {
           "cancel": "[%key:component::lg_thinq::entity::sensor::current_state::state::cancel%]",
           "power_off": "[%key:component::lg_thinq::entity::select::operation_mode::state::power_off%]",
+          "power_on": "[%key:component::lg_thinq::entity::select::operation_mode::state::power_on%]",
           "preheating": "[%key:component::lg_thinq::entity::select::operation_mode::state::preheating%]",
           "start": "[%key:common::action::start%]",
           "stop": "[%key:common::action::stop%]",