diff --git a/tests/test_dryer.py b/tests/test_dryer.py
index 35e4a04..7d98c78 100644
--- a/tests/test_dryer.py
+++ b/tests/test_dryer.py
@@ -1,5 +1,6 @@
 import json
 import unittest
+from unittest import mock
 
 from wideq.client import Client, DeviceInfo
 from wideq.dryer import (
@@ -48,6 +49,8 @@ class DryerStatusTest(unittest.TestCase):
 
     def test_properties(self):
         status = DryerStatus(self.dryer, POLL_DATA)
+        self.assertEqual(self.dryer, status.dryer)
+        self.assertEqual(POLL_DATA, status.data)
         self.assertEqual(DryerState.DRYING, status.state)
         self.assertEqual(DryerState.INITIAL, status.previous_state)
         self.assertEqual(DryLevel.NORMAL, status.dry_level)
@@ -61,3 +64,17 @@ class DryerStatusTest(unittest.TestCase):
         self.assertEqual('No Error', status.error)
         self.assertEqual(TempControl.MID_HIGH, status.temperature_control)
         self.assertEqual(TimeDry.OFF, status.time_dry)
+
+    @mock.patch('wideq.client.logging')
+    def test_properties_unknown_enum_value(self, mock_logging):
+        """
+        This should not raise an error for an invalid enum value and instead
+        use the `UNKNOWN` enum value.
+        """
+        data = dict(POLL_DATA, State='5000')
+        status = DryerStatus(self.dryer, data)
+        self.assertEqual(DryerState.UNKNOWN, status.state)
+        expected_call = mock.call(
+            'Value `%s` for key `%s` not in options: %s. Values from API: %s',
+            '5000', 'State', mock.ANY, mock.ANY)
+        self.assertEqual(expected_call, mock_logging.warning.call_args)
diff --git a/wideq/client.py b/wideq/client.py
index 987cbb9..3ab371c 100644
--- a/wideq/client.py
+++ b/wideq/client.py
@@ -3,6 +3,7 @@ SmartThinQ API for most use cases.
 """
 import json
 import enum
+import logging
 import requests
 import base64
 from collections import namedtuple
@@ -12,6 +13,8 @@ from . import core
 
 DEFAULT_COUNTRY = 'US'
 DEFAULT_LANGUAGE = 'en-US'
+#: Represents an unknown enum value.
+_UNKNOWN = 'Unknown'
 
 
 class Monitor(object):
@@ -350,6 +353,11 @@ class ModelInfo(object):
         """Look up the friendly enum name for an encoded value.
         """
         options = self.value(key).options
+        if value not in options:
+            logging.warning(
+                'Value `%s` for key `%s` not in options: %s. Values from API: '
+                '%s', value, key, options, self.data['Value'][key]['option'])
+            return _UNKNOWN
         return options[value]
 
     def reference_name(self, key: str, value: Any) -> str:
diff --git a/wideq/dryer.py b/wideq/dryer.py
index 191e8c0..2a19121 100644
--- a/wideq/dryer.py
+++ b/wideq/dryer.py
@@ -1,7 +1,7 @@
 import enum
 from typing import Optional
 
-from .client import Device
+from .client import Device, _UNKNOWN
 
 
 class DryerState(enum.Enum):
@@ -17,6 +17,7 @@ class DryerState(enum.Enum):
     RUNNING = '@WM_STATE_RUNNING_W'
     SMART_DIAGNOSIS = '@WM_STATE_SMART_DIAGNOSIS_W'
     WRINKLE_CARE = '@WM_STATE_WRINKLECARE_W'
+    UNKNOWN = _UNKNOWN
 
 
 class DryLevel(enum.Enum):
@@ -31,6 +32,7 @@ class DryLevel(enum.Enum):
     NORMAL = '@WM_DRY27_DRY_LEVEL_NORMAL_W'
     OFF = '-'
     VERY = '@WM_DRY27_DRY_LEVEL_VERY_W'
+    UNKNOWN = _UNKNOWN
 
 
 class DryerError(enum.Enum):
@@ -52,6 +54,7 @@ class DryerError(enum.Enum):
     ERROR_TE2 = '@WM_US_DRYER_ERROR_TE2_W'
     ERROR_TE5 = '@WM_US_DRYER_ERROR_TE5_W'
     ERROR_TE6 = '@WM_US_DRYER_ERROR_TE6_W'
+    UNKNOWN = _UNKNOWN
 
 
 class TempControl(enum.Enum):
@@ -63,6 +66,7 @@ class TempControl(enum.Enum):
     MEDIUM = '@WM_DRY27_TEMP_MEDIUM_W'
     MID_HIGH = '@WM_DRY27_TEMP_MID_HIGH_W'
     HIGH = '@WM_DRY27_TEMP_HIGH_W'
+    UNKNOWN = _UNKNOWN
 
 
 class TimeDry(enum.Enum):
@@ -74,6 +78,7 @@ class TimeDry(enum.Enum):
     FOURTY = '40'
     FIFTY = '50'
     SIXTY = '60'
+    UNKNOWN = _UNKNOWN
 
 
 class DryerDevice(Device):