diff --git a/pyhon/appliances/wh.py b/pyhon/appliances/wh.py
index 7e92ca8..08033d4 100644
--- a/pyhon/appliances/wh.py
+++ b/pyhon/appliances/wh.py
@@ -7,7 +7,7 @@ from pyhon.parameter.base import HonParameter
 class Appliance(ApplianceBase):
     def attributes(self, data: Dict[str, Any]) -> Dict[str, Any]:
         data = super().attributes(data)
-        parameter = data["parameters"]["onOffStatus"]
+        parameter = data.get("parameters", {}).get("onOffStatus")
         is_class = isinstance(parameter, HonParameter)
         data["active"] = parameter.value == 1 if is_class else parameter == 1
         return data