95 Blazer heater problem

Well the problem is this first of all the temp doesn't climb above 120 on my temp gauge which I believe is a thermostat problem then it doesn't blow much air at all and its not very warm. Could this be a heater core problem??? I am not sure. But it blows about half as much as it should and its not very warm. Thanks for your help.

Try a new thermostat first, flush out the cooling system with new antifreeze and see what happens. The Blazers don't seem to blow a lot of air in any one place, but they heat well.

could be a heater core...problem...
Search this thread about heater problems...