You have to bleed your cooling system with the heater on until all the air is purged out of it then it should heat up quickly.
SOURCE: 2003 Kia Sedona Ex. Squeaks when brakes
Most likely, there are metal peaces on the break pad, for when the pads get wore down to a certain point they rub the rotor to let you know its time for new breaks.
SOURCE: No heat. Fan blows cold air.
I think u may have an air temperature control blend door problem, the door is moved by a small electric motor, it is stuck in the cold position.
SOURCE: 2003 Kia Sedona charging system
This is typical. When cold starting/running, it takes more amps to run. It is using amps for higher idle to warm up engine, Altenator is spinning faster, and all sensors are being used at same time.
This is why mechanics say wait til normal operating temperature before any testing is done.
Once the engine hits normal temp, the computer readjust voltage amps, fuel pressure, air intake, timing and more.
SOURCE: my kia sedona van only heats up for a minute or
Check the metal part of the heater core lines at the firewall if you can get to them and see if one side is noticeable colder than the other. At least one of them should be hot or you have a bad thermostat. If both are hot than your hot/cold actuator inside is having a problem
SOURCE: KIA SEDONA HAS REAR HEAT BUT NOT FRONT HEAT
This could be a serious problem. Check your coolant level, then check the rear heater lines that supply coolant to the rear heater. They run under the van, over time they rust and leak. Because it is under and to the rear of the van it is hard to notice, i.e. coolant puddles and smell. But please note that this engine has aluminum cylinder heads and does not take kindly to being overheated.
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