diff --git a/custom_components/plum_ecomax/diagnostics.py b/custom_components/plum_ecomax/diagnostics.py
index aabf352..156ad8f 100644
--- a/custom_components/plum_ecomax/diagnostics.py
+++ b/custom_components/plum_ecomax/diagnostics.py
@@ -18,6 +18,9 @@ def _redact_device_data(device_data: dict[str, Any]) -> dict[str, Any]:
     if "product" in device_data:
         device_data["product"].uid = REDACTED
 
+    if "password" in device_data:
+        device_data["password"] = REDACTED
+
     return device_data
 
 
diff --git a/tests/test_diagnostics.py b/tests/test_diagnostics.py
index 9a506bd..5b7d975 100644
--- a/tests/test_diagnostics.py
+++ b/tests/test_diagnostics.py
@@ -23,6 +23,7 @@ async def test_diagnostics(hass: HomeAssistant, config_entry: ConfigEntry):
     mock_connection.device.data = {
         "test_data": "test_value",
         "product": mock_product_info,
+        "password": "0000",
     }
     hass.data.setdefault(DOMAIN, {})[config_entry.entry_id] = mock_connection
     result = await async_get_config_entry_diagnostics(hass, config_entry)
@@ -40,5 +41,9 @@ async def test_diagnostics(hass: HomeAssistant, config_entry: ConfigEntry):
             "capabilities": ["fuel_burned", "heating_temp"],
         },
     }
-    assert result["data"] == {"test_data": "test_value", "product": mock_product_info}
+    assert result["data"] == {
+        "test_data": "test_value",
+        "product": mock_product_info,
+        "password": REDACTED,
+    }
     assert mock_product_info.uid == REDACTED