It is very rare but the impeller has been known to come loose. First take the heater hose loose right under the therm. & see if there is air in there. If coolant comes out try what Bruce says. About 1 out of 10 new therms. arn't any good.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne Super In the Gallery Forum
