Heater vent control

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Bret - 28 Oct 2006 02:37 GMT

Car: 1992 Dodge Dynasty, 3.3L, A604, 160,000 miles.

Just noticed today that no matter which button I push on the vent control,
heat only comes from the defroster outlet. I no longer hear the vacuum being
relieved like I used to when I changed the settings, nor do I hear the
vents opening / closing.

Does anyone know of a common point of failure that might cause this? It
could give me a starting point before I go and troubleshoot each portion in
trying to track down the cause.

Thanks!

Bret

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maxpower - 28 Oct 2006 03:33 GMT

> Car: 1992 Dodge Dynasty, 3.3L, A604, 160,000 miles.
>
> Just noticed today that no matter which button I push on the vent control,
> heat only comes from the defroster outlet. I no longer hear the vacuum being
> relieved like I used to when I changed the settings, nor do I hear the
> vents opening / closing.

> Does anyone know of a common point of failure that might cause this? It
> could give me a starting point before I go and troubleshoot each portion in
[quoted text clipped - 3 lines]
>
> Bret

Check the main vacuum connector at the brake booster or the check valve at
the booster. The default position is defrost mode whenever vacuum is lost.

Glenn Beasley
Chrysler tech

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Bret - 28 Oct 2006 04:04 GMT

>> Car: 1992 Dodge Dynasty, 3.3L, A604, 160,000 miles.
>>
[quoted text clipped - 19 lines]
> Glenn Beasley
> Chrysler tech

Thanks, that will be the first place I look.

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