Add defrosting as HVACAction in ClimateEntity (#121448)

homeassistant/components/climate/const.py

@@ -97,6 +97,7 @@ class HVACAction(StrEnum):
     """HVAC action for climate devices."""
 
     COOLING = "cooling"
+    DEFROSTING = "defrosting"
     DRYING = "drying"
     FAN = "fan"
     HEATING = "heating"

homeassistant/components/climate/icons.json

@@ -21,6 +21,7 @@
           "default": "mdi:circle-medium",
           "state": {
             "cooling": "mdi:snowflake",
+            "defrosting": "mdi:snowflake-melt",
             "drying": "mdi:water-percent",
             "fan": "mdi:fan",
             "heating": "mdi:fire",

homeassistant/components/climate/strings.json

@@ -69,13 +69,14 @@
         "hvac_action": {
           "name": "Current action",
           "state": {
-            "off": "[%key:common::state::off%]",
-            "preheating": "Preheating",
-            "heating": "Heating",
             "cooling": "Cooling",
+            "defrosting": "Defrosting",
             "drying": "Drying",
+            "fan": "Fan",
+            "heating": "Heating",
             "idle": "[%key:common::state::idle%]",
-            "fan": "Fan"
+            "off": "[%key:common::state::off%]",
+            "preheating": "Preheating"
           }
         },
         "hvac_modes": {

tests/components/mqtt/test_climate.py

@@ -1017,7 +1017,16 @@ async def test_handle_action_received(
 
     # Cycle through valid modes
     # Redefine actions according to https://developers.home-assistant.io/docs/core/entity/climate/#hvac-action
-    actions = ["off", "preheating", "heating", "cooling", "drying", "idle", "fan"]
+    actions = [
+        "off",
+        "preheating",
+        "defrosting",
+        "heating",
+        "cooling",
+        "drying",
+        "idle",
+        "fan",
+    ]
     assert all(elem in actions for elem in HVACAction)
     for action in actions:
         async_fire_mqtt_message(hass, "action", action)