My 1990 mazda 626 is reads hot . i changed my thermostat . i heater works...

[nicholas_garver2001]

...fine and my water pump is fine ,? My bottom hose is really cold even though the top hose is really hot . . and help would be really cool.
I already changed temp sending unit.. i wish it was that easy .
I squeezed the bottom hose with the cape off and fluid came out