diff --git a/homeassistant/components/plugwise/binary_sensor.py b/homeassistant/components/plugwise/binary_sensor.py
index c9053e8468e..ec1f2e5a2b4 100644
--- a/homeassistant/components/plugwise/binary_sensor.py
+++ b/homeassistant/components/plugwise/binary_sensor.py
@@ -36,6 +36,13 @@ BINARY_SENSORS: tuple[PlugwiseBinarySensorEntityDescription, ...] = (
         icon_off="mdi:water-pump-off",
         entity_category=EntityCategory.DIAGNOSTIC,
     ),
+    PlugwiseBinarySensorEntityDescription(
+        key="flame_state",
+        name="Flame State",
+        icon="mdi:fire",
+        icon_off="mdi:fire-off",
+        entity_category=EntityCategory.DIAGNOSTIC,
+    ),
     PlugwiseBinarySensorEntityDescription(
         key="slave_boiler_state",
         name="Secondary Boiler State",