Heat will not come into car

have heater core flushed take hose off motor or heatercore flush one hose at a time till water is clear

It could be that your heater blend door is not directing the air over the heater core so it can be heated as it is pushed in to the passenger compartment. So,have a shop check the operation of the blend door, this can be done with a scan tool, but not a parts store type.