05-10-2007, 12:54 AM
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#1
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HVAC control problems
First off this is my first post here and im searching for help...
my girlfriend has an 03 alero that i just finished installing a sound system into (kept the stock deck and added an amp and subs) and everything went well. i installed all the trim and wire harnesses and now the air will only blow hot-warm air on every selector, and the A/C, defrost and inside-outside air selectors do not work anymore....
Help me, she wont leave me alone!!
Last edited by lowlyfe95 : 05-10-2007 at 12:56 AM.
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05-10-2007, 02:30 AM
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#2
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Premier V.I.P. Member
Join Date: Jan 2006
Location: Pekin, IL.
Posts: 1,233
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wow ... i would say it could be the blower motor resistor although I dont remember it causing this kind of problem.
BTW I moved this topic to the correct area.
__________________
2008 Chevrolet Silverado 1500 LT1 Z71/4x4
2000 Oldsmobile Alero GLS - Sold
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05-10-2007, 11:21 AM
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#3
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GLS member
Join Date: Jul 2004
Location: Where you should be
Posts: 5,577
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Might check to see if you have a short or ground and blew a fuse.
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05-10-2007, 11:22 AM
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#4
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GLS member
Join Date: Jul 2004
Location: Where you should be
Posts: 5,577
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Quote:
Originally Posted by lowlyfe95
Help me, she wont leave me alone!!
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BTW...
Love this part  |
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05-10-2007, 09:52 PM
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#5
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GL Member
Join Date: Nov 2004
Location: Hamilton,Ontario
Posts: 331
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Loose connection on the HVAC and vacuum lines im assuming.
Also firstly id check a fuse for sure after installing the stereo might have grounded somthing out
Try unpluging the vacuum lines from the position selector to see if theres vacuum
Also the heat door might be stuck open thats caused by the whole HVAC control being screwd and youll have to get a new one
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05-11-2007, 09:45 PM
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#6
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GX Member
Join Date: Jan 2004
Location: New Orleans
Posts: 145
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I've had similar problems, but that was more due to me chaning the lights on the HVAC panel. If you didn't remove the HVAC unit from the bezel, then I dunno. I would say double check all the connections on the back end.
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05-11-2007, 09:56 PM
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#7
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GLS member
Join Date: Aug 2006
Location: Grand Forks, ND for school; Langdon, ND home
Posts: 2,632
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sounds like the vacuum line on the back of the temp. selector is messed up. as for the bottom 4 bottons not working, probably a simple didn't get wires pluged in tight or something like that.
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2001½ F150 XLT Crew Cab- true dual glasspacks with x-pipe, AEM intake, SCT X3 with VMP custom tunes, full stereo system, HID 55w heads and 35w fogs, 35% tint front and 20% rear, Lightning tail lights
04 F6 Sno Pro Team edition- MBRP race can, ODS clutch kit
01 YZ125- bored out to 144, PnP cylinder and head, Pro Circuit WORKS suspension, many other mods
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05-12-2007, 09:54 PM
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#8
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GLS member
Join Date: Nov 2003
Location: Eastern MA
Posts: 1,214
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Quote:
Originally Posted by lowlyfe95
First off this is my first post here and im searching for help...
my girlfriend has an 03 alero that i just finished installing a sound system into (kept the stock deck and added an amp and subs) and everything went well. i installed all the trim and wire harnesses and now the air will only blow hot-warm air on every selector, and the A/C, defrost and inside-outside air selectors do not work anymore....
Help me, she wont leave me alone!!
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imo
the heater control valve isn't shutting, wide open full coolant rushing to the heater core and the blower is probably pushing it through the vents.
The vacuum swith should be purely mechanical, so I'd check the 2 silicone lines that run into it, the rest of the electrical switches are as said, more than likely a blown fuse, there must have been a short that took place somewhere, either the battery was connected and one of the connectors was off and brushed on metal, or there is a loose contact on one of those connectors to the blower switch, ventilation switch, or blower selector
my 2 cents 
__________________
smirking is important
follow the titans
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05-14-2007, 01:08 PM
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#9
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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The temperature control is done electrically, the position and recirculation controls are done by vacuum. There's no heater control valve, but a blend door which has an actuator on it. There's no heater control valve, the heater core always has coolant running through it.
__________________
Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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09-22-2009, 12:38 AM
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#10
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GX Member
Join Date: Dec 2008
Location: Norwich CT
Posts: 48
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so how do i fix my control. my control for the blower motor. the only speed that works is the last one. so im driven around with it on full blast or nothing. not only that its cold in the morning and i got a cracked windshield so its a pain in the ass.
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09-22-2009, 12:44 AM
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#11
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GLS member
Join Date: Jun 2008
Location: FL
Posts: 3,723
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Either the blower resistor or the relay.
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