diff --git a/src/EnergyPlus/Autosizing/WaterHeatingCoilUASizing.cc b/src/EnergyPlus/Autosizing/WaterHeatingCoilUASizing.cc
index a147dcbebad..8d05ae9e87c 100644
--- a/src/EnergyPlus/Autosizing/WaterHeatingCoilUASizing.cc
+++ b/src/EnergyPlus/Autosizing/WaterHeatingCoilUASizing.cc
@@ -82,7 +82,6 @@ Real64 WaterHeatingCoilUASizer::size(EnergyPlusData &state, Real64 _originalValu
                 };
                 General::SolveRoot(state, Acc, MaxIte, SolFla, this->autoSizedValue, f, UA0, UA1);
                 if (SolFla == -1) {
-                    errorsFound = true;
                     std::string msg = "Autosizing of heating coil UA failed for Coil:Heating:Water \"" + this->compName + "\"";
                     this->addErrorMessage(msg);
                     ShowSevereError(state, msg);
@@ -141,10 +140,7 @@ Real64 WaterHeatingCoilUASizer::size(EnergyPlusData &state, Real64 _originalValu
                         this->addErrorMessage(msg);
                         ShowContinueError(state, msg);
                     }
-                    this->dataErrorsFound = true;
                 } else if (SolFla == -2) {
-                    this->errorType = AutoSizingResultType::ErrorType1;
-                    errorsFound = true;
                     std::string msg = "Autosizing of heating coil UA failed for Coil:Heating:Water \"" + this->compName + "\"";
                     this->addErrorMessage(msg);
                     ShowSevereError(state, msg);
@@ -217,7 +213,7 @@ Real64 WaterHeatingCoilUASizer::size(EnergyPlusData &state, Real64 _originalValu
                         this->addErrorMessage(msg);
                         ShowContinueError(state, msg);
                     }
-                    this->dataErrorsFound = true;
+                    this->autoSizedValue = UA1;
                 }
             } else {
                 this->autoSizedValue = 1.0;
@@ -258,7 +254,6 @@ Real64 WaterHeatingCoilUASizer::size(EnergyPlusData &state, Real64 _originalValu
                 };
                 General::SolveRoot(state, Acc, MaxIte, SolFla, this->autoSizedValue, f, UA0, UA1);
                 if (SolFla == -1) {
-                    errorsFound = true;
                     std::string msg = "Autosizing of heating coil UA failed for Coil:Heating:Water \"" + this->compName + "\"";
                     this->addErrorMessage(msg);
                     ShowSevereError(state, msg);
@@ -301,7 +296,6 @@ Real64 WaterHeatingCoilUASizer::size(EnergyPlusData &state, Real64 _originalValu
                         this->addErrorMessage(msg);
                         ShowContinueError(state, msg);
                     }
-                    this->dataErrorsFound = true;
                 } else if (SolFla == -2) {
                     this->errorType = AutoSizingResultType::ErrorType1;
                     errorsFound = true;
@@ -361,7 +355,7 @@ Real64 WaterHeatingCoilUASizer::size(EnergyPlusData &state, Real64 _originalValu
                         this->addErrorMessage(msg);
                         ShowContinueError(state, msg);
                     }
-                    this->dataErrorsFound = true;
+                    this->autoSizedValue = UA1;
                 }
             } else {
                 this->autoSizedValue = 1.0;
diff --git a/src/EnergyPlus/SingleDuct.cc b/src/EnergyPlus/SingleDuct.cc
index 29ca2e3937d..e1c8f5bcbf6 100644
--- a/src/EnergyPlus/SingleDuct.cc
+++ b/src/EnergyPlus/SingleDuct.cc
@@ -3000,7 +3000,43 @@ void SingleDuctAirTerminal::SizeSys(EnergyPlusData &state)
                 }
             }
         }
-
+        if (state.dataSize->TermUnitFinalZoneSizing.size() > 0 && this->DamperHeatingAction == Action::ReverseWithLimits &&
+            TermUnitSizing(state.dataSize->CurTermUnitSizingNum).AirVolFlow <
+                state.dataSize->TermUnitFinalZoneSizing(state.dataSize->CurTermUnitSizingNum).DesHeatVolFlow) {
+            ShowMessage(state, format("SizeHVACSingleDuct: Potential issue with equipment sizing for {} = \"{}\".", this->sysType, this->SysName));
+            ShowContinueError(state,
+                              format("Terminal unit design air flow rate during Reheat of {:.5R} [m3/s]",
+                                     TermUnitSizing(state.dataSize->CurTermUnitSizingNum).AirVolFlow));
+            ShowContinueError(state,
+                              format("is less than the zone design heating air flow rate of {:.5R} [m3/s]",
+                                     state.dataSize->TermUnitFinalZoneSizing(state.dataSize->CurTermUnitSizingNum).DesHeatVolFlow));
+            ShowContinueError(state,
+                              format("For reference the zone design cooling air flow rate is {:.5R} [m3/s]",
+                                     state.dataSize->TermUnitFinalZoneSizing(state.dataSize->CurTermUnitSizingNum).DesCoolVolFlow));
+            ShowContinueError(state,
+                              format("For reference the zone design minimum cooling air flow rate is {:.5R} [m3/s]",
+                                     state.dataSize->TermUnitFinalZoneSizing(state.dataSize->CurTermUnitSizingNum).DesCoolVolFlowMin));
+            int zoneNum = state.dataSize->TermUnitFinalZoneSizing(state.dataSize->CurTermUnitSizingNum).ZoneNum;
+            if (zoneNum > 0) {
+                int SizingInputNum =
+                    Util::FindItemInList(state.dataHeatBal->Zone(zoneNum).Name, state.dataSize->ZoneSizingInput, &ZoneSizingInputData::ZoneName);
+                if (SizingInputNum == 0) {
+                    SizingInputNum = 1;
+                }
+                if (state.dataSize->ZoneSizingInput.size() > 0 && state.dataSize->ZoneSizingInput(SizingInputNum).DesHeatMaxAirFlowFrac < 1.0) {
+                    ShowContinueError(state,
+                                      format("Sizing:Zone Heating Maximum Air Flow Fraction = {:.5R}",
+                                             state.dataSize->ZoneSizingInput(SizingInputNum).DesHeatMaxAirFlowFrac));
+                    ShowContinueError(state,
+                                      format("Sizing:Zone Heating Maximum Air Flow per Zone Floor Area = {:.5R} [m3/s/m2]",
+                                             state.dataSize->ZoneSizingInput(SizingInputNum).DesHeatMaxAirFlowPerArea));
+                    ShowContinueError(state,
+                                      format("For reference the zone design maximum heating air flow rate is {:.5R} [m3/s]",
+                                             state.dataSize->TermUnitFinalZoneSizing(state.dataSize->CurTermUnitSizingNum).DesHeatVolFlowMax));
+                }
+            }
+            ShowContinueError(state, "Verify that the values entered are intended and are consistent with other components.");
+        }
         if (TermUnitSizing(state.dataSize->CurTermUnitSizingNum).AirVolFlow > SmallAirVolFlow) {
             if (this->DamperHeatingAction == Action::ReverseWithLimits) {
                 TermUnitSizing(state.dataSize->CurTermUnitSizingNum).ReheatAirFlowMult =
diff --git a/tst/EnergyPlus/unit/Autosizing/WaterHeatingCoilUASizing.unit.cc b/tst/EnergyPlus/unit/Autosizing/WaterHeatingCoilUASizing.unit.cc
index 8c3c7b63206..4b76f1281e5 100644
--- a/tst/EnergyPlus/unit/Autosizing/WaterHeatingCoilUASizing.unit.cc
+++ b/tst/EnergyPlus/unit/Autosizing/WaterHeatingCoilUASizing.unit.cc
@@ -176,12 +176,12 @@ TEST_F(AutoSizingFixture, WaterHeatingCoilUASizingGauntlet)
     state->dataSize->ZoneSizingInput(1).ZoneNum = 1;
     sizer.initializeWithinEP(*this->state, HVAC::cAllCoilTypes(HVAC::Coil_HeatingWater), "MyWaterCoil", printFlag, routineName);
     sizedValue = sizer.size(*state, inputValue, errorsFound);
-    EXPECT_TRUE(errorsFound);
-    EXPECT_TRUE(state->dataSize->DataErrorsFound);
-    EXPECT_TRUE(sizer.dataErrorsFound);
-    EXPECT_ENUM_EQ(AutoSizingResultType::ErrorType1, sizer.errorType);
+    EXPECT_FALSE(errorsFound);
+    EXPECT_FALSE(state->dataSize->DataErrorsFound);
+    EXPECT_FALSE(sizer.dataErrorsFound);
+    EXPECT_ENUM_EQ(AutoSizingResultType::NoError, sizer.errorType);
     EXPECT_TRUE(sizer.wasAutoSized);
-    EXPECT_NEAR(3.0, sizedValue, 0.01); // 0.1% of 3000 W capacity
+    EXPECT_NEAR(3000.0, sizedValue, 0.01); // 100% of 3000 W capacity
     state->dataWaterCoils->WaterCoil(1).InletAirTemp = 21.0;
     state->dataSize->DataErrorsFound = false;
     sizer.dataErrorsFound = false;
@@ -272,9 +272,9 @@ TEST_F(AutoSizingFixture, WaterHeatingCoilUASizingGauntlet)
     EXPECT_ENUM_EQ(AutoSizingResultType::ErrorType1, sizer.errorType);
     EXPECT_TRUE(sizer.wasAutoSized);
     EXPECT_TRUE(errorsFound);
-    EXPECT_TRUE(state->dataSize->DataErrorsFound);
-    EXPECT_TRUE(sizer.dataErrorsFound);
-    EXPECT_NEAR(3.0, sizedValue, 0.01); // 0.1% of 3000 W capacity
+    EXPECT_FALSE(state->dataSize->DataErrorsFound);
+    EXPECT_FALSE(sizer.dataErrorsFound);
+    EXPECT_NEAR(3000.0, sizedValue, 0.01); // 100% of 3000 W capacity
     state->dataWaterCoils->WaterCoil(1).InletAirTemp = 21.0;
     state->dataSize->DataErrorsFound = false;
     sizer.dataErrorsFound = false;