diff --git a/src/pooldose/client.py b/src/pooldose/client.py
index 9911247..96806f0 100644
--- a/src/pooldose/client.py
+++ b/src/pooldose/client.py
@@ -10,7 +10,7 @@
 from getmac import get_mac_address
 
 
-from pooldose.constants import get_default_device_info
+from pooldose.constants import MODEL_ALIASES, get_default_device_info
 from pooldose.type_definitions import DeviceInfoDict, StructuredValuesDict, APIVersionResponse
 from pooldose.mappings.mapping_info import MappingInfo
 from pooldose.request_handler import RequestHandler
@@ -170,7 +170,8 @@ async def _load_device_info(self) -> RequestStatus:  # pylint: disable=too-many-
         model_id = self.device_info.get("MODEL_ID")
         fw_code = self.device_info.get("FW_CODE")
         if model_id and fw_code:
-            self._mapping_info = await MappingInfo.load(str(model_id), str(fw_code))
+            resolved_model = MODEL_ALIASES.get(str(model_id), str(model_id))
+            self._mapping_info = await MappingInfo.load(resolved_model, str(fw_code))
         else:
             _LOGGER.warning("Missing MODEL_ID or FW_CODE, cannot load mapping")
             self._mapping_info = MappingInfo(mapping=None, status=RequestStatus.NO_DATA)
@@ -262,9 +263,9 @@ async def instant_values(self) -> tuple[RequestStatus, InstantValues | None]:
             device_raw_data = raw_data.get("devicedata", {}).get(device_id, {})
             model_id = str(self.device_info.get("MODEL_ID", ""))
             fw_code = str(self.device_info.get("FW_CODE", ""))
-            if model_id == 'PDHC1H1HAR1V1' and fw_code == '539224':
-                #due to identifier issue in device firmware, use mapping prefix of PDPR1H1HAR1V0
-                model_id = 'PDPR1H1HAR1V0'
+            # Resolve model alias for devices that report a different
+            # PRODUCT_CODE than the model used in their data keys.
+            model_id = MODEL_ALIASES.get(model_id, model_id)
             prefix = f"{model_id}_FW{fw_code}_"
             return RequestStatus.SUCCESS, InstantValues(device_raw_data, mapping, prefix, device_id, self._request_handler)
         except (KeyError, TypeError, ValueError) as err:
diff --git a/src/pooldose/constants.py b/src/pooldose/constants.py
index 5f23f24..b28a4f1 100644
--- a/src/pooldose/constants.py
+++ b/src/pooldose/constants.py
@@ -2,6 +2,14 @@
 
 from pooldose.type_definitions import DeviceInfoDict
 
+# Model alias mapping: PRODUCT_CODE reported by device → model ID used in data keys/mappings.
+# Some devices report a different PRODUCT_CODE than the model ID actually used
+# in their data keys and mapping files.
+MODEL_ALIASES: dict[str, str] = {
+    "PDHC1H1HAR1V1": "PDPR1H1HAR1V0",
+    "PDPR1H1HAW102": "PDPR1H1HAW100",
+}
+
 # Default device info structure
 DEFAULT_DEVICE_INFO: DeviceInfoDict = {
     "NAME": None,           # Device name
diff --git a/tests/conftest.py b/tests/conftest.py
index 10dacf7..f9c37ec 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -242,3 +242,73 @@ def complete_client_setup(  # pylint: disable=redefined-outer-name
         "raw_data": mock_raw_data,
         "structured_data": mock_structured_data
     }
+
+
+@pytest.fixture
+def mock_debug_config_aliased_model():
+    """Create mock debug config with a PRODUCT_CODE that requires alias resolution.
+
+    This simulates a device that reports PDPR1H1HAW102 as its PRODUCT_CODE,
+    but uses PDPR1H1HAW100 in its actual data keys and mapping files.
+    """
+    return {
+        "GATEWAY": {
+            "DID": "TEST456",
+            "NAME": "Aliased Device",
+            "FW_REL": "1.7"
+        },
+        "DEVICES": [{
+            "DID": "TEST456_DEVICE",
+            "NAME": "POOLDOSE pH+ORP CF Group Wi-Fi",
+            "PRODUCT_CODE": "PDPR1H1HAW102",
+            "FW_REL": "1.7",
+            "FW_CODE": "539187"
+        }]
+    }
+
+
+@pytest.fixture
+def mock_device_info_aliased():
+    """Create mock device information for an aliased model."""
+    return {
+        "NAME": "Aliased Device",
+        "SERIAL_NUMBER": "TEST456",
+        "DEVICE_ID": "TEST456_DEVICE",
+        "MODEL": "POOLDOSE pH+ORP CF Group Wi-Fi",
+        "MODEL_ID": "PDPR1H1HAW102",
+        "OWNERID": "Owner1",
+        "GROUPNAME": "GroupA",
+        "FW_VERSION": "1.7",
+        "SW_VERSION": "3.00",
+        "API_VERSION": "v1/",
+        "FW_CODE": "539187",
+        "MAC": None,
+        "IP": "192.168.3.158",
+        "WIFI_SSID": "IoT Wi-Fi",
+        "WIFI_KEY": None,
+        "AP_SSID": None,
+        "AP_KEY": None
+    }
+
+
+@pytest.fixture
+def mock_raw_data_aliased():
+    """Create mock raw data using PDPR1H1HAW100 keys (the resolved alias model)."""
+    return {
+        "devicedata": {
+            "TEST456_DEVICE": {
+                "PDPR1H1HAW100_FW539187_w_1eommf39k": {
+                    "current": 17.5,
+                    "magnitude": ["°C"]
+                },
+                "PDPR1H1HAW100_FW539187_w_1ekeigkin": {
+                    "current": 7.3,
+                    "magnitude": ["pH"]
+                },
+                "PDPR1H1HAW100_FW539187_w_1eklenb23": {
+                    "current": 728,
+                    "magnitude": ["mV"]
+                }
+            }
+        }
+    }
diff --git a/tests/test_client.py b/tests/test_client.py
index 05b4b13..e1de868 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -270,3 +270,82 @@ def test_is_connected_property(self):
         # pylint: disable=protected-access
         client._connected = True
         assert client.is_connected is True
+
+
+class TestModelAliases:
+    """Test MODEL_ALIASES resolution for devices that report a different PRODUCT_CODE."""
+
+    @pytest.mark.asyncio
+    async def test_connect_resolves_model_alias(
+        self, mock_request_handler, mock_debug_config_aliased_model, mock_mapping_info
+    ):
+        """Test that connect() resolves PDPR1H1HAW102 to PDPR1H1HAW100 for mapping loading."""
+        client = PooldoseClient(host="192.168.3.158")
+
+        mock_request_handler.get_debug_config.return_value = (
+            RequestStatus.SUCCESS, mock_debug_config_aliased_model
+        )
+        mock_request_handler.get_wifi_station.return_value = (
+            RequestStatus.SUCCESS, {"IP": "192.168.3.158", "SSID": "IoT Wi-Fi"}
+        )
+        mock_request_handler.get_access_point.return_value = (RequestStatus.SUCCESS, {})
+        mock_request_handler.get_network_info.return_value = (RequestStatus.SUCCESS, {})
+
+        with patch('pooldose.client.RequestHandler', return_value=mock_request_handler):
+            with patch(
+                'pooldose.mappings.mapping_info.MappingInfo.load',
+                return_value=mock_mapping_info
+            ) as mock_load:
+                status = await client.connect()
+
+        assert status == RequestStatus.SUCCESS
+        # Verify MappingInfo.load was called with the resolved alias model ID
+        mock_load.assert_called_once_with("PDPR1H1HAW100", "539187")
+        # The original MODEL_ID should still reflect what the device reported
+        assert client.device_info["MODEL_ID"] == "PDPR1H1HAW102"
+
+    @pytest.mark.asyncio
+    async def test_instant_values_uses_resolved_prefix(
+        self, mock_request_handler, mock_device_info_aliased,
+        mock_mapping_info, mock_raw_data_aliased
+    ):
+        """Test that instant_values() uses the resolved model alias for the data prefix."""
+        client = PooldoseClient(host="192.168.3.158")
+        # pylint: disable=protected-access
+        client._request_handler = mock_request_handler
+        client.device_info.update(mock_device_info_aliased)
+        client._mapping_info = mock_mapping_info
+
+        mock_request_handler.get_values_raw.return_value = (
+            RequestStatus.SUCCESS, mock_raw_data_aliased
+        )
+
+        status, instant_values = await client.instant_values()
+
+        assert status == RequestStatus.SUCCESS
+        assert isinstance(instant_values, InstantValues)
+
+    @pytest.mark.asyncio
+    async def test_existing_alias_pdhc1h1har1v1(
+        self, mock_request_handler, mock_mapping_info
+    ):
+        """Test that the existing PDHC1H1HAR1V1 alias still works via MODEL_ALIASES."""
+        client = PooldoseClient(host="192.168.1.100")
+        # pylint: disable=protected-access
+        client._request_handler = mock_request_handler
+        client.device_info.update({
+            "DEVICE_ID": "TEST_DEVICE",
+            "MODEL_ID": "PDHC1H1HAR1V1",
+            "FW_CODE": "539224",
+        })
+        client._mapping_info = mock_mapping_info
+
+        mock_request_handler.get_values_raw.return_value = (
+            RequestStatus.SUCCESS,
+            {"devicedata": {"TEST_DEVICE": {}}}
+        )
+
+        status, instant_values = await client.instant_values()
+
+        assert status == RequestStatus.SUCCESS
+        assert isinstance(instant_values, InstantValues)