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#1 |
Registered User
Join Date: Sep 2007
Location: south shore KY
Posts: 43
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a/c question
my a/c doesnt blow very hard. I have a new blower motor in it. It wont keep you cool. You can feel cool air coming out but not very hard when its on hi. anyone have any ideas on how to speed it up a little?
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1972 C-10 short bed, 2wd, 350(ls1 coming soon) 1969 camaro ss, 496 stoker, 4sp 2009 crew cab,duramax 2500hd 4x4, lifted (sold) 2008 Daytona Charger, Hemi Orange, 07 C6 Z06 2005 suburban, 2002 grand prix gt 2005 grizzly, 2004 R1 |
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#2 |
Old Skool Club
![]() Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: a/c question
Probably not a speed issue, unless it won't run on high speed. There's a relay for the top speed. Yours may be bad. If so, it's not unusual.
If it runs on high speed, you may have an issue with the cables that operate the door, or a leaking plenum (the S-shaped piece). The doors that bring in outside air may not be sealing off. There's a piece of linkage on the passenger side of the firewall, right at the top of the firewall. You should check it, too. The valve that controls the hot water to the heater, may not be closing off. If it is an OEM type, there may be a problem with the vacuum that controls it, or the AC controller, OR you may just want to replace it with a manual valve that you can shut off. Heated water in the cab will give your cooled air a big obstacle to overcome.
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Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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#3 |
Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,143
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Re: a/c question
Is the motor speeding up with each click of the switch?
Posted via Mobile Device
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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#4 |
Registered User
Join Date: Sep 2007
Location: south shore KY
Posts: 43
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Re: a/c question
the fan does change speed on every setting. i did notice that it blows a little bit out every outlet (floor, defroster, a/c vents). I know there is a problem there with the box but i would think it should still cool the cab. I will check those things. I dont know much about these systems though. It is a factory system, most of the parts in it are new.
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1972 C-10 short bed, 2wd, 350(ls1 coming soon) 1969 camaro ss, 496 stoker, 4sp 2009 crew cab,duramax 2500hd 4x4, lifted (sold) 2008 Daytona Charger, Hemi Orange, 07 C6 Z06 2005 suburban, 2002 grand prix gt 2005 grizzly, 2004 R1 |
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#5 |
Moderator
![]() Join Date: May 2007
Location: Southern Cal
Posts: 20,004
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Re: a/c question
The recirculating vent door (on the passenger kick panel, inside the cab) should be open when the A/C is on. If it is closed, that will rob your air volume big time. As Chevloray pointed out, the fresh air door (pass side cowl, under the hood) should be closed.
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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#6 |
Registered User
Join Date: Sep 2007
Location: south shore KY
Posts: 43
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Re: a/c question
ok, the door on the passenger kick panel is working. it doesnt look like the parts on the passenger cowl under the hood doesnt seem to be working. I tried everything and that linkeage that goes through the firewall never moves. could that be my problem maybe?
__________________
1972 C-10 short bed, 2wd, 350(ls1 coming soon) 1969 camaro ss, 496 stoker, 4sp 2009 crew cab,duramax 2500hd 4x4, lifted (sold) 2008 Daytona Charger, Hemi Orange, 07 C6 Z06 2005 suburban, 2002 grand prix gt 2005 grizzly, 2004 R1 |
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