diff --git a/powerwall.sh b/powerwall.sh
index 601e2467..8ae0306c 100755
--- a/powerwall.sh
+++ b/powerwall.sh
@@ -245,7 +245,7 @@ CHECKTEMP_SERVICE(){
 				fi
 				if [ "${SENSORS_CHECK}" != "" ]; then
 					for SENSOR in "${SENSORS_CHECK[@]}"; do
-						[ "${last_temp[${SENSOR//-/}]}" == "" ] && last_temp[${SENSOR//-/}]=0
+						last_temp[${SENSOR//-/}]=0
 						if [ "${PW_THRESHOLDS[${SENSORa}]}" != "" ]; then
 							echo ${PW_THRESHOLDS[${SENSORa}]} | cut -d',' -f 1 | read temp_warn
 							echo ${PW_THRESHOLDS[${SENSORa}]} | cut -d',' -f 2 | read temp_crit