I've got a 03 tiburon 4 cyl and I love it but it doesn't have any heat! I put a new thermostat in it and still blows cold air can anybody ge me a few suggestions as to what my problem may be please!?! Thanks
You could have a clogged heater core, or a stuck blend door motor. First, get the car hot. Then put your hands on the heater hoses as close to the firewall as possible. If both hoses are the same temperature, then a clog is unlikely. The blend door motor would be the next thing to check. I dont remember which side its on off the top of my head.
Make sure your coolant is topped off and there isn't air stuck in the system. I had intermittent heat that turned out to be low coolant.
Can you hear the blend door moving when you turn the temperature dial? you can use the recalculation button or zone dial for reference as they use the same style blend door. If you can, get the car hot and see if you can feel a difference between the feed and return hose for the heater core.