Index: firmware/App/Controllers/AirPump.c
===================================================================
diff -u -rff6e2f4897feba45015772dce12a4c7ca9923b55 -r02f3bf10bc1da8a886b2f3292e5e9dc2efe4ace3
--- firmware/App/Controllers/AirPump.c	(.../AirPump.c)	(revision ff6e2f4897feba45015772dce12a4c7ca9923b55)
+++ firmware/App/Controllers/AirPump.c	(.../AirPump.c)	(revision 02f3bf10bc1da8a886b2f3292e5e9dc2efe4ace3)
@@ -33,6 +33,7 @@
 
 #define AIR_PUMP_DATA_PUB_INTERVAL          ( MS_PER_SECOND / TASK_GENERAL_INTERVAL )           ///< Air pump data publish interval.
 #define DATA_PUBLISH_COUNTER_START_COUNT    13                                                  ///< Air pump data publish start counter.
+#define AIR_PUMP_STALL_PERSISTENCE          ( 150 / TASK_GENERAL_INTERVAL )                     ///< Stall duration before alarm (150 ms)
 
 #pragma pack(push, 1)
 /// Payload record structure for air pump test set command message payload.
@@ -228,11 +229,11 @@
     if ( ( currentAirPumpPowerLevel > 0 ) && ( currentAirPumpRPM == 0 ) )
     {
         // We are commanding air pump to run but zero measured pump speed indicates it is not running
-        if ( airPumpStallCounter < 3 )
+        if ( airPumpStallCounter < AIR_PUMP_STALL_PERSISTENCE )
         {
             airPumpStallCounter++;
         }
-        if ( airPumpStallCounter >= 3 )
+        if ( airPumpStallCounter >= AIR_PUMP_STALL_PERSISTENCE )
         {
             SET_ALARM_WITH_2_U32_DATA( ALARM_ID_TD_AIR_PUMP_STALL, currentAirPumpPowerLevel, currentAirPumpRPM );
         }