diff --git a/src/saic_ismart_client/ota_v3_0/data_model.py b/src/saic_ismart_client/ota_v3_0/data_model.py
index 6d06227..56ad6b6 100644
--- a/src/saic_ismart_client/ota_v3_0/data_model.py
+++ b/src/saic_ismart_client/ota_v3_0/data_model.py
@@ -154,6 +154,9 @@ def get_current(self) -> float:
     def get_voltage(self) -> float:
         return self.bmsPackVol * 0.25
 
+    def is_battery_heating(self) -> bool:
+        return self.bmsPTCHeatReqDspCmd == 1
+
     def get_power(self) -> float:
         return self.get_current() * self.get_voltage() / 1000.0
 
diff --git a/src/saic_ismart_client/saic_api.py b/src/saic_ismart_client/saic_api.py
index 510945d..9fedee2 100644
--- a/src/saic_ismart_client/saic_api.py
+++ b/src/saic_ismart_client/saic_api.py
@@ -567,7 +567,7 @@ def get_charging_status_with_retry(self, vin_info: VinInfo) -> MessageV30:
 
     def control_battery_heating(self, enable: bool, vin_info: VinInfo, event_id: str = None) -> MessageV30:
         chrg_heat_req = OtaChrgHeatReq()
-        chrg_heat_req.ptcHeatReq = bool_to_int(enable)
+        chrg_heat_req.ptcHeatReq = 1 if enable else 2
         chrg_heat_req_msg = MessageV30(MessageBodyV30(), chrg_heat_req)
         application_id = '516'
         application_data_protocol_version = 768