| [GMCnet] No hot air from the dash heater [message #147609] |
Sun, 23 October 2011 21:15  |
kincaid76royale
Messages: 71
Registered: February 2005
Karma: 0
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Hi All:We have a 1976 Royale RB w/455.
We replaced the leaking heater core and then couldn't get any cabin heat. There was no flow through the new heater core. - many tests etc. We had replaced the vacuum valve in the 5/8 line with a ball valve because, up-'till-then, our major problem was too much cabin heat even when trying to "Air Condition". At a suggestion from Alonzo at Jim K's we put a shut off valve in the hose to the water heater (heat exchanger Now we have hot water circulating through the heater core BUT still no hot air coming into the cabin. Is there a special combination of dash controls to enable this.
Thanks,
Jack Kincaid, Castro Valley, CA
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| Re: [GMCnet] No hot air from the dash heater [message #147614 is a reply to message #147609] |
Sun, 23 October 2011 21:25  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Jack,
Clarify "we replaced". Did you do it? Are you sure you (or the replacer)
didn't disconnect the temperature control cable at the driver's side of the
HVAC box?
Ken H.
On Sun, Oct 23, 2011 at 10:15 PM, Jack Kincaid Castro valley, CA <
kincaid76royale@comcast.net> wrote:
> Hi All:We have a 1976 Royale RB w/455.
>
> We replaced the leaking heater core and then couldn't get any cabin heat.
> There was no flow through the new heater core. - many tests etc. We had
> replaced the vacuum valve in the 5/8 line with a ball valve because,
> up-'till-then, our major problem was too much cabin heat even when trying to
> "Air Condition". At a suggestion from Alonzo at Jim K's we put a shut off
> valve in the hose to the water heater (heat exchanger Now we have hot water
> circulating through the heater core BUT still no hot air coming into the
> cabin. Is there a special combination of dash controls to enable this.
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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