Heater blows all the time

2007 HYUNDAI ENTOURAGE
89,756 MILES
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PETER BOVI
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Heater blows all the time, doesn't matter what the setting is on (even in off position) blows hot even when you set it to cold.(front & rear are doing the same)no response when pressing a/c button either.seems to be blowing at high speed though

No matter what the selector is on (defrost,floor,vent ect. even off position)The heater is blowing (seems like high speed) Even if you turn the temp setting to cold still blows hot. The rear heater is doing the same.It's seems like the system is in some kinda bypass mode.spoke to local dealer & cold Hyundai Teck line, said to try transistor (which I have ordered)I feel this isn't the problem though.This transistor seems to be for fan speed I believe. When I unplug it the fan in front stops but the rear keeps blowing & can't change rear temp.Any help I will appreciate.
Feb 4, 2012 at 4:20 PM
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RASMATAZ
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Check if the blower relay is sticking also the blower switch
Feb 4, 2012 at 4:29 PM
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PETER BOVI
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It's not the relay cause I swapped the front blower relay with the rear blower relay. Also don't think it's the fan switch cause front & rear are separate switches. Note: Front & rear heaters are doing the same.I'm thinking it's the main heater control unit.Is there a way to test it with out throwing parts at it! Thanks !!
Feb 5, 2012 at 1:05 AM
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RIVERMIKERAT
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You can try swapping a used module from the junkyard.
Feb 6, 2012 at 6:26 AM
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PETER BOVI
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Just wanted to let everyone know it was my Heater control unit. Thanks!!
Feb 16, 2012 at 3:17 AM
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RIVERMIKERAT
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Happy to be of help! Tell ALL of yor friends about us!


Closing thread.
Feb 16, 2012 at 4:36 AM