diff --git a/tasmota/tasmota_xdrv_driver/xdrv_44_miel_hvac.ino b/tasmota/tasmota_xdrv_driver/xdrv_44_miel_hvac.ino
index fe414bd12..17de2e460 100644
--- a/tasmota/tasmota_xdrv_driver/xdrv_44_miel_hvac.ino
+++ b/tasmota/tasmota_xdrv_driver/xdrv_44_miel_hvac.ino
@@ -184,8 +184,9 @@ struct miel_hvac_data_stage
 #define MIEL_HVAC_STAGE_OPERATION_NORMAL 0x00
 #define MIEL_HVAC_STAGE_OPERATION_UNKNOWN 0x01
 #define MIEL_HVAC_STAGE_OPERATION_DEFROST 0x02
-#define MIEL_HVAC_STAGE_OPERATION_STANDBY 0x03
+#define MIEL_HVAC_STAGE_OPERATION_UNKNOWN1 0x03
 #define MIEL_HVAC_STAGE_OPERATION_PREHEAT 0x04
+#define MIEL_HVAC_STAGE_OPERATION_STANDBY 0x08
 	uint8_t fan;
 #define MIEL_HVAC_STAGE_FAN_OFF 0x00
 #define MIEL_HVAC_STAGE_FAN_1 0x01