Question about 2003 Kia Sedona

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2003 kia sedona over heats but put a new thermostat in it the fans work okay

What else could it be didn't flush the antifreeze yet

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How many miles ? Water pump could be bad !

Posted on Apr 06, 2015

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  • Kia Master
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Make sure the cooling system has been bled of all air and is full. Air in the system can cause overheating.Make sure the radiator cap is functioning properly. Worse case scenario is a bad headgasket.

Posted on Apr 06, 2015

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Posted on Jan 02, 2017

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2004 pontiac grand am.fan's don't work so car over heats,so Disconnected sensor on thermostat,fan's turn on,put a new sensor in on thermostat,fans don't come on car over heats


Hey Donna,
First, remove the thermostat and flush the coolant system..install a new thermostat and refill with antifreeze.. this should cure your problem... do this and reply...........
the thermostat should be located where the top radiator hose meets the engine block......

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I need to replace, a ects in my 2003 KIA sedona where is that piece located


Sarah, The Engine Coolant Temperature Sensor on your Kia is located below rad hose driver side by exhaust manifold. May be a good time to flush coolant system when changing sensor.
Check the attached links,instruction and guides, Good luck
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2003 kia sedona is running hot when idle but does fine when moving and also the A/C has stopped working


this sounds like you thermostat maybe partally stuck, or you cooling fans are not comeing on, check all your fuses and be sure the fans kick on high speed when the car gets hot at idle not driving, if they do come on try rplacing the thermostat,

Jul 31, 2011 | 2003 Kia Sedona

2 Answers

Was driving in snowy conditions and all of sudden my van stopped. got it towed to the mechanic, he checked and found nothing wrong. He drove for tqo days and gave it to me. Then I drove for 3 weeks all...


Sounds like you have moisture getting into your ignition somewhere. Have your mechanic look at it again but have him water down engine compartment, little at a time.

Jan 02, 2011 | 2003 Kia Sedona

1 Answer

2005 kia sedona - no rear heat


Look on your dash on the ride side of your radio, there are 4 black squares, the botton three are usually blank, the top one says RR HTR, push that one in. If the heat does not work than join the club, mine has only blown warm heat in the last 2 years. I've had the rad flushed and all the rear lines replaced. moz-screenshot.jpg

Dec 12, 2009 | 2005 Kia Sedona

1 Answer

03 silverado overheats while sitting with A/C on. Fan is working and coolant is full. It only overheats when A/C is on.


That is common since the a/c condenser is in front of the radiator. It may just be time for you to service the cooling system. If you have the orange antifreeze in your system, there only good for 5 years or 150,000 miles and then it needs to be flushed out and replaced with new antifreeze. Make sure the new antifreeze has a 50/50 mix (antifreeze/water) to much antifreeze will gel up when heated causing poor heat transfer and to much water will boil over. Water has great heat transfer but boils at 100C' so antifreeze is added. Service the cooling system for now, don't worry about the thermostat till you change the antifreeze unless you want to replace it too.  Good luck and keep me posted.

Jun 26, 2009 | 2003 Chevrolet Silverado 1500

1 Answer

No heat


Check the heater hoses going into the firewall when hot they should both be warm one more so than the other. if they are cool you do not have coolant geting to the heater core thermostat is wrong or backwards. I asume you replaced the stat due to this problem so your hoses are probably hot. If there is a big differance the heater core may be plugged. flush it from the cooler of the two hoses with a garden hose out the side of the hotter hose. DO not do this while it is hot! If the hoses are close in temp you have a blend door control issue. It may be the actuator on the heater box or the controller on the dash. Good Luck

Mar 02, 2009 | 2004 Kia Sedona

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