96 Astro Van Heating

96 Astro Van Heating

Postby Astro-Hunter [OP] » December 5th 2010, 12:36am

My 96 Astro Van heater does not get hot. The air direction controls work fine. As the temp wasn't getting to the normal operating temp I had the thermostat changed. Now it gets to the normal range and I can tell when it opens and closes. So far so good. Here is the problem. Only one of the heater hoses gets hot. I figured it was a clogged heater core so I pulled the hoses and flushed the core. Well the water from the garden hose just zipped right on through the heater core. The only thing that came out was fresh coolant at first then lots of water. I don't know how to tell if the issue is with the diverter valve or the heater temp control on the dash. I would truly appreciate any help that anyone can offer. Thanks.
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Re: 96 Astro Van Heating

Postby chevymaherchevymaher is online! » December 5th 2010, 1:03am

There is a valve with a vacuum line running to it between the engine and heater core.Replacing it and the heat in these vans is still not worth a nickle. Take it out and splice lines together so it gets unrestricted flow and these things got heat like a 60s car it will run you out. you will be turning the heat down soonas the engine temp up more than five minutes.Mine was located directly in front of air box. On newer models they to the right of box downtoward the bottom.I been taking them off alot of vans once the owners see my heat in mine.
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Re: 96 Astro Van Heating

Postby Astro-Hunter [OP] » December 5th 2010, 2:42am

Thanks for the reply. I hadn't considered doing that. I'll look into it.
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Re: 96 Astro Van Heating

Postby Lumpy » November 28th 2011, 6:14am

chevymaher wrote:There is a valve with a vacuum line running to it between the engine and heater core...



Where is this mythical valve on an 89? I've searched from underhood, from wheel well, from under front,
from under behind wheel. I can visualize (I think) all the hose to the heater core. There doesn't seem
to be any valve anywhere.

Is it made of invisible plastic?


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Re: 96 Astro Van Heating

Postby Leeann_93 » November 29th 2011, 2:34am

I'm not sure the valve exists on an '89.
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Re: 96 Astro Van Heating

Postby chevymaherchevymaher is online! » November 29th 2011, 2:41am

Lumpy wrote:
chevymaher wrote:There is a valve with a vacuum line running to it between the engine and heater core...



Where is this mythical valve on an 89? I've searched from underhood, from wheel well, from under front,
from under behind wheel. I can visualize (I think) all the hose to the heater core. There doesn't seem
to be any valve anywhere.

Is it made of invisible plastic?


Lump

Must been removed or as leAnn said never had one.It is listed as being on there,said it was same as mine. :shrug: musta been that invisible stuff.
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