Index: firmware/App/Controllers/AirTrap.c
===================================================================
diff -u -r7b9f88168b56fecff1a4e1ccdbd494c1a1b28fff -r2d8147c1c9419b59c34d0f4d7dc91d84c57f5391
--- firmware/App/Controllers/AirTrap.c	(.../AirTrap.c)	(revision 7b9f88168b56fecff1a4e1ccdbd494c1a1b28fff)
+++ firmware/App/Controllers/AirTrap.c	(.../AirTrap.c)	(revision 2d8147c1c9419b59c34d0f4d7dc91d84c57f5391)
@@ -198,7 +198,7 @@
     {
         if ( airTrapUpperLevelCtr > 0 )
         {
-            airTrapUpperLevelCtr--;
+            airTrapUpperLevelCtr = 0;
         }
     }