Question about 2003 Kia Sedona

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2003 kia sedona over heating and no heat

Temp gauge is reading hot however there isnt the typical steam coming from the engine when it says it is overheating.. and there is no heat coming from heater , blower works

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  • daltoncorp Dec 29, 2008

    where is the best place to find diagram of how to replace it?

  • nicoleachris Jan 16, 2009

    I have the same problem buts its not the thermostat... dont know what to do??

  • callen018 Feb 03, 2009

    Same problem here on a 2005 Kia Sedona. Temp was running hot, so I checked the engine coolant which was VERY low. Added some, seemed to be ok, but now I'm not getting any heat. Only feels luke warm when I'm driving. As soon as I stop, I get cold air. It's only like 10 degrees outside and my fan is kicking on to keep the engine cool...and temp gauge was just a little tiny bit over the mid way point where it's supposed to be, so it seems that it's still overheating. Looking for a fix...hoping it was thermostat, but according to you guys, it's not. Waiting now for brother in law to call, as he's a mechanic.

  • WhyKia Mar 05, 2009

    I have an '02 Sedona with the same issues. Heater has been blowing cold air for awhile, and now the temp guage just about went to the top. One earlier answer said to replace the thermostat, but another said that's not it? What's the right answer?



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Check your rear coolant lines, These lines always rust and start leaking coolant and thats why your engine over heats and you dont get any heat inside your car. This is a common problem with kia sedona that have rear A/C and Heater. There are two fixes to this problem. The first is to replace the rear heater coolant lines with the updated lines from kia. The second will be bypassing the rear coolant lines with a hose, however the rear heater will not work with this method.

removing the rear coolant lines is not that easy. The lines near the fire wall are really hard to remove. Its also much easier to replace the lines with the car on a hoist.
hope that helpfull

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Posted on Feb 02, 2010

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I would try replacing your thermostat. this should fix both problems

Posted on Dec 29, 2008

  • toney clark Dec 30, 2008

    your local auto parts store will have a haynes manual and those have pictures and step by step directions


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You have an air gap, keep filling the rad while the car is running you need to get the air out, fill up the rad and it will bubble and lower keep doing it until it stops, the its full

Posted on Jan 09, 2011

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06 Kia Sedona overheats when ac is on. If the ac is off the van will return to normal temps. Had the compressor just replaced and v-belt. Both fans appear to be running when ac is on.

Does the engine over heat or the gauge goes to hot. Really hot. Since the A/C is on , this puts an extra load on the engine. This is why the fans come on when the A/C is turned on. This is usually low speed fan mode. High speed doesn't come on untilll 220 to 230 degrees. Most vehicles. Cars don't over heat untill the gauge gets in the red, when it starts getting close is time to worry and stop. I guess the question to you would be, What does the temp gauge read?

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My kia van hardly has any heat but the temprature gage says normal whats going on

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Feb 19, 2011 | 2003 Kia Sedona

2 Answers

I'm having water problems in the motor. the temp gauge reads that it's running hot, but it's not. when we r driving the heat is not getting hot. when we stop driving the car it's got a hissing sound and...

water pump needs replacing. The temp sensor in the motor is reading way hot but since pump isn't truning not moving coolant around to heat air coming into vechile.

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Temp gauge will go to hot & come back to normal,is it thermostat?

try the thermostat first if its not that SELL IT lol the head gaskets can cause it to over heat so will cracked or warped heads if you drive it to long overheating ( if it is )
you can do alot of damage to the engine GET IT LOOKED AT this can some times be very costly to fix

Nov 10, 2009 | Kia Sedona Cars & Trucks

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2003 kia sedona over heating and no heat

OOPS ,big mistake ,did you turn engine over with a rachet first to make sure valves cleared pistons

Mar 29, 2009 | 2004 Kia Sedona

1 Answer

2003 kia sedona over heating and no heat

This Problem is Usually Caused by a Malfuntioning Thermostat. Change the Thermostat and let me know what you get. Please Rate My Solution, I Need all the Help That I can get! Thanks!

Jan 26, 2009 | 2004 Kia Sedona

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