diff -r dd1eb3f7fbf4 -r 01b393df529a www/js/mon_fermenter.js
--- a/www/js/mon_fermenter.js	Sat Apr 27 12:18:54 2019 +0200
+++ b/www/js/mon_fermenter.js	Sat Apr 27 13:08:53 2019 +0200
@@ -370,7 +370,7 @@
 				$("#target_hi").jqxNumberInput({ readOnly: true, Width: 50, spinButtons: false });
 			}
 
-			if (record.online && record.door_address && (record.door_state == "0")) {
+			if (record.online && record.door_address && (record.door_state != "0")) {
 				$("#fermenter_doorled").html('<div class="LEDyellow_on"></div>Door');
 			} else {
 				$("#fermenter_doorled").html('<div class="LEDyellow_off"></div>Door');