My heater core is new and my blower motor works but I still get no heat ...what's my problem?

check coolant level,must be full,check it when cold..where is the temperature hand at on the gauge when the vehicle is at normal operating temperature?

The thermostat reads at 175° and both lines on heater core get hot

175 really will not get you hot air. If you have 175, the thermostat should still be closed, allowing the engine to get to proper operating temperature. I do not know the proper thermostat temperature in that vehicle, but I would definitely think it should be more than 175. What was the original heater core replacement reason? Did you purge air pockets from the cooling system after this work? Use extra caution with cooling systems -- you could easily get burned by hot coolant. Good luck!

Internal HVAC baffling problem - seek *hands-on* help from qualified personnel.