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Old 04-23-2013, 01:57 AM   #1
Coreycarlile911
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Member#: 282614
Join Date: May 2011
Chapter/Region: NWIC
Location: Spokane Washington
Vehicle:
2006 Wrx sti
Black pearl

Default 06 sti blowing cold air

I've been searching for similar problem and can't really find someone with my same issue.

So at random my car with the heat set to 75 will start to blow out colder air. But if I change the temp to 85 it blows hot air. The water temp and oil temp are all right where they are supposed to be. It has happened bout twice this week the air outside is in the 50s. Its just like the temp for heat is off like 75 is 65 and 85 would be round 75. Its doesn't change at idle or when driving, its consistently blowing the colder air no matter how I drive it. The car has bout 123 k and had the gates timing belt with water pump kit installed bout 10 k ago and with new Subaru coolant. Anyone know what may be going on? I'm stumped so any help would be great!
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Old 04-23-2013, 02:21 AM   #2
jebjkey
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Location: Naples, ITALY
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2005 STi
2006 Evolution MR

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The temperature setting is not a setting for the temp of the air coming out of the vent, it is a temperature setting for what you want the air in the cabin to be. The HVAC system will control the temp of the air coming out of the vent in order to control cabin temperature to your setting.

Try adjusting the temperature buy a degree or two and see if the air warms up and then goes back to "cool" air to maintain temp.

The suction port for the cabin temp sensor is the round slit area below the HVAC controls. You can also take that panel off and clean the temp sensor, maybe it is really dirty and not giving accurate readings. You can see what I am talking about in this thread. http://forums.nasioc.com/forums/show....php?t=1902725
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Old 04-23-2013, 02:42 AM   #3
Coreycarlile911
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Join Date: May 2011
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Location: Spokane Washington
Vehicle:
2006 Wrx sti
Black pearl

Default

Quote:
Originally Posted by jebjkey View Post
The temperature setting is not a setting for the temp of the air coming out of the vent, it is a temperature setting for what you want the air in the cabin to be. The HVAC system will control the temp of the air coming out of the vent in order to control cabin temperature to your setting.

Try adjusting the temperature buy a degree or two and see if the air warms up and then goes back to "cool" air to maintain temp.

The suction port for the cabin temp sensor is the round slit area below the HVAC controls. You can also take that panel off and clean the temp sensor, maybe it is really dirty and not giving accurate readings. You can see what I am talking about in this thread. http://forums.nasioc.com/forums/show....php?t=1902725
Yea I get that the temp setting is not for the air coming out the vent. It just seems to be blowing a bit colder altogether than normal. I will trying cleaning that sensor tho. That very well could be the issue, my cars become pretty dusty after winter. I'll clean that up real quick and report back if it happens again.
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Old 04-23-2013, 03:07 AM   #4
Coreycarlile911
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Join Date: May 2011
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Location: Spokane Washington
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2006 Wrx sti
Black pearl

Default

Quote:
Originally Posted by jebjkey View Post
The temperature setting is not a setting for the temp of the air coming out of the vent, it is a temperature setting for what you want the air in the cabin to be. The HVAC system will control the temp of the air coming out of the vent in order to control cabin temperature to your setting.

Try adjusting the temperature buy a degree or two and see if the air warms up and then goes back to "cool" air to maintain temp.

The suction port for the cabin temp sensor is the round slit area below the HVAC controls. You can also take that panel off and clean the temp sensor, maybe it is really dirty and not giving accurate readings. You can see what I am talking about in this thread. http://forums.nasioc.com/forums/show....php?t=1902725
Ok I think that did it. I couldn't seem to get the actual sensor off or detach that hose, but I took a look in there from the front and it was pretty gumed up with dust. I just sprayed some maf sensor cleaner down in there and it was blowing hotter air than before with the car only a qtr way warmed up.

Thanks man I did not think that would be that easy. I was thinking way bigger problems lol.. Gotta love a quick fix!
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Old 04-23-2013, 03:22 AM   #5
jebjkey
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2005 STi
2006 Evolution MR

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No problem.
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Old 04-24-2013, 12:24 AM   #6
Coreycarlile911
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Vehicle:
2006 Wrx sti
Black pearl

Default

Quote:
Originally Posted by jebjkey View Post
No problem.
So any advice on getting that sensor all the way off so I can clean it properly. I drive for bit today and the air coming out the vents still seems to be bit cooler than normal. Last night I tryed pulling that black hose off and it wouldn't come loose. I also tryed pulling that plastic piece that the hose connects to off but it also wouldn't pop off. It looks as if that sensor should somehow come out but I cant seems to get it off without breaking anything. What ya think?
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Old 04-24-2013, 07:47 AM   #7
jebjkey
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2005 STi
2006 Evolution MR

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I am not sure about the hose being stuck. Even the first time I took my center panel off I was able to pull the black hose off [of course I bought my car used]. There is a lip to hold the hose on that you must pull it over, but I am not sure about any glue or something. I believe the temp sensor part comes off by freeing the click-lock [for lack of a better word/description] tab holding it in place. It has been awhile since I have pulled mine off so memory is a little fuzzy.

Try working the hose around some more and/or pulling harder?
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Old 04-25-2013, 12:41 AM   #8
Coreycarlile911
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Member#: 282614
Join Date: May 2011
Chapter/Region: NWIC
Location: Spokane Washington
Vehicle:
2006 Wrx sti
Black pearl

Default

Quote:
Originally Posted by jebjkey View Post
I am not sure about the hose being stuck. Even the first time I took my center panel off I was able to pull the black hose off [of course I bought my car used]. There is a lip to hold the hose on that you must pull it over, but I am not sure about any glue or something. I believe the temp sensor part comes off by freeing the click-lock [for lack of a better word/description] tab holding it in place. It has been awhile since I have pulled mine off so memory is a little fuzzy.

Try working the hose around some more and/or pulling harder?
Ok yea I was pulling on that hose pretty hard and seemed like it may have has some type of glue but I may just need to wiggle it off the lip and I saw that the click lock thing there but when I pressed the tab in it wouldn't come off. I'm gonna give it another shot with some tools and if cleaning that sensor all the way doesn't work I'll post again and see if there may be another issue. Is it possible that that sensor is bad or do they usually not fail?
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Old 04-25-2013, 08:55 AM   #9
MakeItRoar
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Obsidian Black Pearl

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You've gotta really be mean to that hose sometimes. I had one on an sti that came off when I pulled by the front trim gently, and one in my WRX that took a few tries and some profanity
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