diff --git a/powerwall.sh b/powerwall.sh
index 527cbb39..77765d86 100755
--- a/powerwall.sh
+++ b/powerwall.sh
@@ -262,7 +262,7 @@ if [ ${action-x} ]; then
 			if [ "${2}" = "stop" ]; then
 				STOP_SERVICE ${3}
 			else
-				CHECKTEMP_SERVICE ${2}
+				CHECKTEMP_SERVICE ${3}
 			fi
 		;;
 		checkacv_service)