The inside heat white wire does not have any power coming from it.

Not knowing what you have, no one can help. Not to sound mean, but you know the old saying. You need to help me help you. Make, model and serial # will help.

More info about the system would be helpful (brand/model#/type/etc.). Does any part of the system function? If not, verify correct line voltage input & control transformer output. Try bypassing the circuit in question at the thermostat. If the thermostat is old, the selector switches may be worn & impeding voltage transmission.