You need to remove the whole dash assembely out of the vehicle. I know it sounds like alot of work. But this job can be done in one day with just simple hand tools. Remove The dash trim pieces around radio and under dash. Unbold steering wheel support brackets and let steering wheel rest on floor. unbolt dash unit from Metal structure. roll dash back onto both front seats and let sit. Remove Evap an heater core boxes as one unit remembering to loosen heater core hoses from outside under hood from box before removal. remove heater core box from evap box.reverse procedure for installation of new one
You may need to replace your Thermostat or your Heater Core.
replace it. I have not had to replace one recently but 29.00 to 50.00 for heater core . Not including labor.
you can try radiator leak stopper, but i would just replace heater core .,eally cannot be repaired.
replace heater core under dash passenger side
i net remove and intalation mi heater core kia sedona 2003
kia sportage heater core at autozone is $ 93.99
I think it is your heater core gone bad
Replace the resister, if that doesn't work replace the blower motor.
Probably a leaking heater core.
heater core sits below the front dash in the center there should be a panel below the front dash where the center counsel connects on the passenger side take that off and you should see the pipe going to the heater core
one of two things , #1, low on antifreeze or #2 , heater core plugged up.