Front heater core out but rear works

When i bought the van the guy told me the front heater core was out. I have no heat in the front of the van and when you turn the fan on nothing happens. No air, hot or cold blows out. The back works though, gets hot and the fan blows air out. Therefore I have no front heat or defroster. Is there a way to connect the back heater core hoses to where the front ones connect and blow the heat into the front instead of the rear?

No, there is no way to do that. You simply must fix what is wrong with the front heater core. If the core itself has failed, it simply must be replaced. Based on the safety aspects of clearing your windshield when it is filed, this is an essential component of the vehicle that must be repaired to drive safely. Start with testing it the find out what’s really wrong.