1996 Lumina - heat/air blower problem

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ll - 02 Feb 2007 17:02 GMT

I have a 1996 3.1L and it's having problems with the heat/air blower.
When I dial it to blow through the front vents (that face the driver),
it will blow through the defrost vents for about 10 minutes and then
will (off and on) switch over to the driver vents.
There also seems to be quite a load on the engine (I had a new
compressor put in about 2 yrs ago, and that's about the same time that
this began. Any ideas about what might be causing this?

Thanks
Lou

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« Paul » - 03 Feb 2007 00:40 GMT

> I have a 1996 3.1L and it's having problems with the heat/air blower.
> When I dial it to blow through the front vents (that face the driver),
[quoted text clipped - 6 lines]
> Thanks
> Lou

Sounds like a really bad vacuum leak, somewhere.

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Comboverfish - 03 Feb 2007 05:56 GMT

> I have a 1996 3.1L and it's having problems with the heat/air blower.
> When I dial it to blow through the front vents (that face the driver),
[quoted text clipped - 6 lines]
> Thanks
> Lou

I only have a general suggestion, but look at the firewall area near
the heater hoses and A/C lines for a vacuum tee. Also look on the
intake manifold and near/around the vacuum brake booster Check any
such vacuum tees and lines you see for cracks and deterioration.
Follow any vacuum lines that appear to go either to the fenderwell
area and disappear, or to a plastic vacuum storage tank mounted in the
engine compartment. If you find such a storage tank, check it for
cracks also.

Toyota MDT in MO

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ll - 14 Feb 2007 21:18 GMT

Thanks guys for the suggestions - I'll be sure to check these areas.

-Lou

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