Index: firmware/App/Modes/ModeHeatDisinfect.c
===================================================================
diff -u -ra1ba8f7e866ace5c42e0e1107eeb9414639180e3 -r89106884a4ac89a648cfb1175e8c8322cfde1f5b
--- firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision a1ba8f7e866ace5c42e0e1107eeb9414639180e3)
+++ firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision 89106884a4ac89a648cfb1175e8c8322cfde1f5b)
@@ -94,7 +94,7 @@
 #define HEAT_DISINFECT_TARGET_RO_FLOW_TRANSFER_LPM 0.8F                                                        ///< Heat disinfect target RO flow rate in L/min when transferring between reservoirs.
 #define HEAT_DISINFECT_MAX_RO_PRESSURE_PSI         30                                                          ///< Heat disinfect maximum RO pressure in psi.
 #define HEAT_DISINFECT_START_TEMP_TIMEOUT_MS       ( 4 * MIN_PER_HOUR * SEC_PER_MIN * MS_PER_SECOND )          ///< Heat disinfect reaching to minimum temperature timeout in milliseconds.
-#define RSRVRS_TARGET_VOL_OUT_TIMEOUT_MS           ( 5 * MS_PER_SECOND )                                       ///< Reservoirs 1 & 2 maximum volume out of range timeout during heat disinfect.
+#define RSRVRS_TARGET_VOL_OUT_TIMEOUT_MS           ( 10 * MS_PER_SECOND )                                      ///< Reservoirs 1 & 2 maximum volume out of range timeout during heat disinfect.
 #define RSRVRS_MAX_TARGET_VOL_CHANGE_ML            150.0F                                                      ///< Reservoirs 1 & 2 maximum allowed volume change when full during heat disinfect.
 #define POST_HEAT_DISINFECT_WAIT_TIME_MS           ( 3 * SEC_PER_MIN * MS_PER_SECOND )                         ///< Heat disinfect final wait time before flushing the system in milliseconds.
 #define HEAT_DISINFECT_MAX_TEMP_GRADIENT_C         15.0F                                                       ///< Heat disinfect maximum allowed temperature gradient in between hottest and coldest sensors.