Add a warning message for out of bound mixture tempertures

src/tespy/connections/connection.py

@@ -37,6 +37,7 @@
 from tespy.tools.fluid_properties.functions import dT_mix_ph_dfluid
 from tespy.tools.fluid_properties.functions import p_sat_T
 from tespy.tools.fluid_properties.helpers import get_number_of_fluids
+from tespy.tools.fluid_properties.helpers import get_mixture_temperature_range
 from tespy.tools.global_vars import ERR
 from tespy.tools.global_vars import fluid_property_data as fpd
 from tespy.tools.helpers import TESPyConnectionError
@@ -917,7 +918,14 @@ def calc_results(self):
                 )
                 logger.error(msg)
                 _converged = False
-
+            else:
+                _, Tmax = get_mixture_temperature_range(self.fluid_data)
+                if self.T.val_SI > Tmax:
+                    msg = (
+                        "The temperature value of the mixture is above the "
+                        "upper temperature limit of a mixture component. "
+                        "The resulting temperature might not be erroneous."
+                    )
         else:
             try:
                 if not self.x.is_set: