Home » Public Forums » GMCnet » [GMCnet] Dash AC/ Heater Controls
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160721 is a reply to message #160720] |
Fri, 17 February 2012 21:22   |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
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| nancy mercier wrote on Fri, 17 February 2012 19:54 |
OK I've got the dash half apart because the slider on the dash air will
only go half way. A lot of plastic in there. It seems to be "sticking" any
thing I can spray in there to loosen it up. I already tried silicone.
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The problem may be at the "crank" at the heater/AC box. Many times the cable will kink there and make it feel like the AC control is bad. Sometimes, the cable will kink right at the control head slider as well. If you have the back panel off, try slightly moving the lever and see if the cable is kinked or bound up. This is for the temp lever. If you have trouble with the mode lever, the problem will be a dry "wafer" in the vacuum control. That's a different issue we can walk you through.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160734 is a reply to message #160721] |
Fri, 17 February 2012 22:03 |
nancy mercier
Messages: 62
Registered: February 2012
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Thanks Bob, both are sticking, I will look tomorrow at the cable. Hope that
new airbag works out for you!
On Fri, Feb 17, 2012 at 8:22 PM, Bob de Kruyff <NEXT2POOL@aol.com> wrote:
>
>
> nancy mercier wrote on Fri, 17 February 2012 19:54
> > OK I've got the dash half apart because the slider on the dash air will
> > only go half way. A lot of plastic in there. It seems to be "sticking"
> any
> > thing I can spray in there to loosen it up. I already tried silicone.
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> The problem may be at the "crank" at the heater/AC box. Many times the
> cable will kink there and make it feel like the AC control is bad.
> Sometimes, the cable will kink right at the control head slider as well. If
> you have the back panel off, try slightly moving the lever and see if the
> cable is kinked or bound up. This is for the temp lever. If you have
> trouble with the mode lever, the problem will be a dry "wafer" in the
> vacuum control. That's a different issue we can walk you through.
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160744 is a reply to message #160734] |
Fri, 17 February 2012 23:21 |
Larry C
Messages: 1168
Registered: July 2004
Location: NE Illinois by the Illino...
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I had no heat from the time I bought the GMC. From all the talk of lousy AC/heat from the vents, I thought it was just normal.
One other thing that threw me off was that one of the original PO's had cut all the vacuum lines to the heater control so there was no vacuum operation. I assume there must have been a vacuum problem and this was how they tried to find it. I don't know...
One day I was putzing around and removed the cable from the crank for the baffle door in the heat/AC box and found the crank moved forward and back easily but the cable was seized. I then started the GMC and when she warmed up, low and behold, I had heat coming from the vents.
Further inspection found that the cable end at the control under the dash had disintegrated so the cable could not slide inside the casing. I ordered a cable from Jim B ( I could not get hold of Jim K for some reason ), and after I installed the new cable I could now turn on and off the heat by the control on the dash.
You may or may not have a similar problem but this is what fixed my lack of heat problem.
Gatsbys' CRUISER  08-18-04
74 GLACIER X, 260/455-APC-4 Bagg'r
Remflex Manifold gaskets
CampGrounds needed, Add yours to "PLACES" />
http://www.gmceast.com/travel
_
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160780 is a reply to message #160734] |
Sat, 18 February 2012 10:38 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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""Thanks Bob, both are sticking, I will look tomorrow at the cable. Hope that
new airbag works out for you!
""
Nancy! I didn't realize who I was talking to  Looks like you got on the net OK and look forward to seeing you again. Yes, the airbag is under the seat and waiting for duty (hopefully 20 years from now) !
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160782 is a reply to message #160720] |
Sat, 18 February 2012 10:43 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| nancy mercier wrote on Fri, 17 February 2012 19:54 |
OK I've got the dash half apart because the slider on the dash air will
only go half way. A lot of plastic in there. It seems to be "sticking" any
thing I can spray in there to loosen it up. I already tried silicone.
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If the "mode" lever is sticking it may be due to the circular wafer that directs vacuum to different ports when you move the lever. It rotates and may be stuck from inactivity. I'd avoid taking it apart for now since they are fragile and prone to leaking. At this point, I'd keep applying a bit of WD40 to that circular plastic part and coax it a bit avery few days to see if it loosens up.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160784 is a reply to message #160720] |
Sat, 18 February 2012 10:48 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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| nancy mercier wrote on Fri, 17 February 2012 19:54 |
OK I've got the dash half apart because the slider on the dash air will
only go half way. A lot of plastic in there. It seems to be "sticking" any
thing I can spray in there to loosen it up. I already tried silicone.
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Nancy,
The cable mentioned by others is your most likely problem. There is also a plastic pin in the center of the whole mechanism that is very likely to break if you put an excessive amount of force on any of those levers. A replacement pin, made of aluminum, is available from Sirum's. Jim K. also stocks them. I broke mine one very cold morning and didn't have any control over the dash heat or AC until I finally took the control out, disassembled it, and replaced that pin. It was the kind of job that I put off because I was afraid to tackle it, but it turned out to be fairly straightforward and easy. It has worked well ever since. I'm still careful how much force I apply to those control levers. It should be a pretty easy fix, especially for a motorcycle mechanic like yourself.
Welcome to the Net!
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160795 is a reply to message #160784] |
Sat, 18 February 2012 12:04 |
idrob
Messages: 645
Registered: January 2005
Location: Central Idaho
Karma: 0
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| Carl S. wrote on Sat, 18 February 2012 08:48 |
| nancy mercier wrote on Fri, 17 February 2012 19:54 |
OK I've got the dash half apart because the slider on the dash air will
only go half way. A lot of plastic in there. It seems to be "sticking" any
thing I can spray in there to loosen it up. I already tried silicone.
|
Nancy,
The cable mentioned by others is your most likely problem. There is also a plastic pin in the center of the whole mechanism that is very likely to break if you put an excessive amount of force on any of those levers. A replacement pin, made of aluminum, is available from Sirum's. Jim K. also stocks them. I broke mine one very cold morning and didn't have any control over the dash heat or AC until I finally took the control out, disassembled it, and replaced that pin. It was the kind of job that I put off because I was afraid to tackle it, but it turned out to be fairly straightforward and easy. It has worked well ever since. I'm still careful how much force I apply to those control levers. It should be a pretty easy fix, especially for a motorcycle mechanic like yourself.
Welcome to the Net!
|
Along with what others have said (and I think the nylon pin may be your problem, and needs to be replaced, see above) there is a seldom seen, or found adjustment on the AC/Heat blend door cable. Here is a photo of where it is:
http://www.gmcmhphotos.com/photos/showphoto.php?photo=12014&cat=4048
It might help you or someone else.
Rob Allen
former owner of '76 x-PB
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160804 is a reply to message #160795] |
Sat, 18 February 2012 14:23 |
nancy mercier
Messages: 62
Registered: February 2012
Karma: 0
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Member |
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While I have the dash apart, I am going to replace the radio, I need
something that gives me an ipod connections, hopefully that fits in nearly
exact as the stock one. Anybody with a brand that fits? I was really
hoping not to have to use a conversion kit.
On Sat, Feb 18, 2012 at 11:04 AM, Rob Allen <profmail@wildblue.net> wrote:
>
>
> Carl S. wrote on Sat, 18 February 2012 08:48
> > nancy mercier wrote on Fri, 17 February 2012 19:54
> > > OK I've got the dash half apart because the slider on the dash air will
> > > only go half way. A lot of plastic in there. It seems to be
> "sticking" any
> > > thing I can spray in there to loosen it up. I already tried silicone.
> >
> >
> >
> > Nancy,
> >
> > The cable mentioned by others is your most likely problem. There is
> also a plastic pin in the center of the whole mechanism that is very likely
> to break if you put an excessive amount of force on any of those levers. A
> replacement pin, made of aluminum, is available from Sirum's. Jim K. also
> stocks them. I broke mine one very cold morning and didn't have any
> control over the dash heat or AC until I finally took the control out,
> disassembled it, and replaced that pin. It was the kind of job that I put
> off because I was afraid to tackle it, but it turned out to be fairly
> straightforward and easy. It has worked well ever since. I'm still
> careful how much force I apply to those control levers. It should be a
> pretty easy fix, especially for a motorcycle mechanic like yourself.
> >
> > Welcome to the Net!
>
>
> Along with what others have said (and I think the nylon pin may be your
> problem, and needs to be replaced, see above) there is a seldom seen, or
> found adjustment on the AC/Heat blend door cable. Here is a photo of where
> it is:
>
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=12014&cat=4048
>
> It might help you or someone else.
>
> --
> Rob Allen
> former owner of '76 x-PB
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160809 is a reply to message #160804] |
Sat, 18 February 2012 16:55 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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So far, the Kenwood and Duals in DIN size fit... the holder they slide in is just the height to fit the cutout in the metal dash. Bend the two control tabs back enough to allow the mount to slide in, and bend the mount tabs up and down to hold it.
--johnny
'76 23' transmode norris
'76 palm beach.
________________________________
From: nancy mercier <mercier.nancy@gmail.com>
To: gmclist@temp.gmcnet.org
Sent: Saturday, February 18, 2012 3:23 PM
Subject: Re: [GMCnet] Dash AC/ Heater Controls
While I have the dash apart, I am going to replace the radio, I need
something that gives me an ipod connections, hopefully that fits in nearly
exact as the stock one. Anybody with a brand that fits? I was really
hoping not to have to use a conversion kit.
On Sat, Feb 18, 2012 at 11:04 AM, Rob Allen <profmail@wildblue.net> wrote:
>
>
> Carl S. wrote on Sat, 18 February 2012 08:48
> > nancy mercier wrote on Fri, 17 February 2012 19:54
> > > OK I've got the dash half apart because the slider on the dash air will
> > > only go half way. A lot of plastic in there. It seems to be
> "sticking" any
> > > thing I can spray in there to loosen it up. I already tried silicone.
> >
> >
> >
> > Nancy,
> >
> > The cable mentioned by others is your most likely problem. There is
> also a plastic pin in the center of the whole mechanism that is very likely
> to break if you put an excessive amount of force on any of those levers. A
> replacement pin, made of aluminum, is available from Sirum's. Jim K. also
> stocks them. I broke mine one very cold morning and didn't have any
> control over the dash heat or AC until I finally took the control out,
> disassembled it, and replaced that pin. It was the kind of job that I put
> off because I was afraid to tackle it, but it turned out to be fairly
> straightforward and easy. It has worked well ever since. I'm still
> careful how much force I apply to those control levers. It should be a
> pretty easy fix, especially for a motorcycle mechanic like yourself.
> >
> > Welcome to the Net!
>
>
> Along with what others have said (and I think the nylon pin may be your
> problem, and needs to be replaced, see above) there is a seldom seen, or
> found adjustment on the AC/Heat blend door cable. Here is a photo of where
> it is:
>
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=12014&cat=4048
>
> It might help you or someone else.
>
> --
> Rob Allen
> former owner of '76 x-PB
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160833 is a reply to message #160804] |
Sat, 18 February 2012 21:01 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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| nancy mercier wrote on Sat, 18 February 2012 14:23 |
While I have the dash apart, I am going to replace the radio, I need
something that gives me an ipod connections, hopefully that fits in nearly
exact as the stock one. Anybody with a brand that fits? I was really
hoping not to have to use a conversion kit.
|
Nancy - care must be taken when changing the radio not to get the wrong wire for the ground connection. Something about a gray wire and the dash light circuit. Sorry but ICRC what it is exactly but someone will respond.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160868 is a reply to message #160804] |
Sun, 19 February 2012 09:44 |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| nancy mercier wrote on Sat, 18 February 2012 15:23 |
While I have the dash apart, I am going to replace the radio, I need something that gives me an ipod connections, hopefully that fits in nearly exact as the stock one. Anybody with a brand that fits? I was really hoping not to have to use a conversion kit.
|
Nancy,
Except for some expensive retro-kits, everything out there is a DIN mount and will require some modification of the dash. As to what has iPod native connection, you will have to inquire on that one directly. Many, but not all can fit an extension cable that is iPod/iPhone compatible for both service and power, but Apple ties up so much with proprietary connections, that this has to be carefully investigated. Most every current DIN mount has or can add a 1/8 (3.5mm) stereo plug for input, but then you have to figure out how to get power there. Many also have USB, and Chinese cables for iThings are available.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160875 is a reply to message #160868] |
Sun, 19 February 2012 11:09 |
nancy mercier
Messages: 62
Registered: February 2012
Karma: 0
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Member |
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I've got the mode slide working now, it was the cable, just unscrewed and
loosened it. It slides like a dream now. Thanks all of you so much.
However the temperature slide is still stuck, any more suggestions?
On Sun, Feb 19, 2012 at 8:44 AM, Matt Colie <matt7323tze@gmail.com> wrote:
>
>
> nancy mercier wrote on Sat, 18 February 2012 15:23
> > While I have the dash apart, I am going to replace the radio, I need
> something that gives me an ipod connections, hopefully that fits in nearly
> exact as the stock one. Anybody with a brand that fits? I was really
> hoping not to have to use a conversion kit.
>
> Nancy,
> Except for some expensive retro-kits, everything out there is a DIN mount
> and will require some modification of the dash. As to what has iPod native
> connection, you will have to inquire on that one directly. Many, but not
> all can fit an extension cable that is iPod/iPhone compatible for both
> service and power, but Apple ties up so much with proprietary connections,
> that this has to be carefully investigated. Most every current DIN mount
> has or can add a 1/8 (3.5mm) stereo plug for input, but then you have to
> figure out how to get power there. Many also have USB, and Chinese cables
> for iThings are available.
>
> Matt
> --
> Matt & Mary Colie
> '73 Glacier 23 Chaumière (say show-me-air) Just about as stock as you will
> find
> SE Michigan - Twixt A2 and Detroit
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160883 is a reply to message #160875] |
Sun, 19 February 2012 12:14 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""I've got the mode slide working now, it was the cable, just unscrewed and
loosened it. It slides like a dream now. Thanks all of you so much.
However the temperature slide is still stuck, any more suggestions?
""
Nancy, try disconnecting the cable at the crank on the LH side of the heater box under the driver side hatch. Sometimes the temp door sticks and you can free it by moving it by hand. If it moves freely, then try moving the temp lever with the cable still disconnected under the hood. If it is still tight, the cable may be semi seized.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160924 is a reply to message #160883] |
Sun, 19 February 2012 20:26 |
nancy mercier
Messages: 62
Registered: February 2012
Karma: 0
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Member |
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The cable when disconnected, moves in and out when moving the dash
control. The crank moves freely when disconnected. When I reconnect, the
dash lever will not go all the way to the "cold" mode.
Also anyone have a parts number for the blower relay? The blower only
works sometimes, and usually on high. It goes on and off by itself.
On Sun, Feb 19, 2012 at 11:14 AM, Bob de Kruyff <NEXT2POOL@aol.com> wrote:
>
>
> ""I've got the mode slide working now, it was the cable, just unscrewed and
> loosened it. It slides like a dream now. Thanks all of you so much.
> However the temperature slide is still stuck, any more suggestions?
>
> ""
>
> Nancy, try disconnecting the cable at the crank on the LH side of the
> heater box under the driver side hatch. Sometimes the temp door sticks and
> you can free it by moving it by hand. If it moves freely, then try moving
> the temp lever with the cable still disconnected under the hood. If it is
> still tight, the cable may be semi seized.
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160925 is a reply to message #160924] |
Sun, 19 February 2012 20:48 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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That means the cable is misadjusted. At the control head you will see an adjustment sleeve that is plastic. You should be able to turn that by hand to move the cable to the correct position,
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Dash AC/ Heater Controls [message #160930 is a reply to message #160924] |
Sun, 19 February 2012 21:20 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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I`d check the ground wire on the blower motor first. They are famous for not being tight.
[quote title=nancy mercier wrote on Sun, 19 February 2012 21:26] The blower only
works sometimes, and usually on high. It goes on and off by itself.
C. Boyd
76 Crestmont
East Tennessee
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