Cooling Problems

I just replaced my heater core. Took quiet some time before I got heat to blow and now its running hot. Fluid may be a lil low due to burping but I dont feel its to low. While I let it cool off I thought I would ask for a lil help. If by chance I swapped the hoses on the firewall would that cause it to over heat?

:banghead:

Exchanging the hoses at the firewall (heater core) shouldn't cause any loss of cooling. Having entrapped air in the cooling system, however, will cause overheating. Make sure the cooling system is filled, and that the air bleeders are opened to allow air to purge.