diff --git a/src/ems-esp.cpp b/src/ems-esp.cpp
index 0f2749bd4..db8924930 100644
--- a/src/ems-esp.cpp
+++ b/src/ems-esp.cpp
@@ -601,13 +601,13 @@ void publishValues(bool force) {
         rootBoiler["outdoorTemp"] = (double)EMS_Boiler.extTemp / 10;
     if (abs(EMS_Boiler.wWCurTmp) < EMS_VALUE_SHORT_NOTSET)
         rootBoiler["wWCurTmp"] = (double)EMS_Boiler.wWCurTmp / 10;
-    if (abs(EMS_Boiler.wWCurFlow) < EMS_VALUE_SHORT_NOTSET)
+    if (abs(EMS_Boiler.wWCurFlow) != EMS_VALUE_INT_NOTSET)
         rootBoiler["wWCurFlow"] = (double)EMS_Boiler.wWCurFlow / 10;
     if (abs(EMS_Boiler.curFlowTemp) < EMS_VALUE_SHORT_NOTSET)
         rootBoiler["curFlowTemp"] = (double)EMS_Boiler.curFlowTemp / 10;
     if (abs(EMS_Boiler.retTemp) < EMS_VALUE_SHORT_NOTSET)
         rootBoiler["retTemp"] = (double)EMS_Boiler.retTemp / 10;
-    if (abs(EMS_Boiler.sysPress) < EMS_VALUE_SHORT_NOTSET)
+    if (abs(EMS_Boiler.sysPress) != EMS_VALUE_INT_NOTSET)
         rootBoiler["sysPress"] = (double)EMS_Boiler.sysPress / 10;
     if (abs(EMS_Boiler.boilTemp) < EMS_VALUE_SHORT_NOTSET)
         rootBoiler["boilTemp"] = (double)EMS_Boiler.boilTemp / 10;
diff --git a/src/test_data.h b/src/test_data.h
index 053664a57..62e191d28 100644
--- a/src/test_data.h
+++ b/src/test_data.h
@@ -44,7 +44,8 @@ static const char * TEST_DATA[] = {
     "30 00 FF 00 02 62 00 E7 01 AE 80 00 80 00 80 00 80 00 80 00 80 00 80 00 80 00 80 00 80 00",    // test 39 - SM100
     "30 00 FF 00 02 62 00 E4",                                                                      // test 40 - SM100
     "10 48 F7 00 FF 01 A5 DF FF F7 7F 1F",                                                          // test 41 - gateway
-    "30 00 FF 09 02 64 1E"                                                                          // test 42 - SM100
+    "30 00 FF 09 02 64 1E",                                                                         // test 42 - SM100
+    "08 00 18 00 05 03 30 00 00 00 00 04 40 80 00 02 17 80 00 00 00 FF 30 48 00 CB 00 00 00"        // test 43 - sys pressure
 
 };