Replace the resister, if that doesn't work replace the blower motor.
one of two things , #1, low on antifreeze or #2 , heater core plugged up.
it has a dead raccoon stuck in it
i net remove and intalation mi heater core kia sedona 2003
MY WIFE HAS A 99 KIA SEPHIA. SHE HAS HAD NOTHING BUT BAD LUCK OUT OF IT. ANYWAY THE HEATER MOTOR IS LOCATED UNDER THE DASH,RIGHT BELOW THE GLOVE BOX. I HAVE TO BEAT ON HERS WITH A RUBBER MALLET TO GET IT TO WORK.
First guess would be a bad ignition switch.
kia sportage heater core at autozone is $ 93.99
you can try radiator leak stopper, but i would just replace heater core .,eally cannot be repaired.
You may need to replace your Thermostat or your Heater Core.
== == The heater fan is electrically driven, so the fault will be either a loose wire connection, or the heater fan switch needs to be replaced. Have a licensed mechanic test the wiring and the switch function to find the fault and then repair it.
heater core
Did you chech the fuse?
yes