[Chrysler300] 62 heater - reply

["John J. Hertog" <crossram@xxxxxxxxxxxxx>]

Hi Bill,

There is more than likely a problem in the vacuum system which controls all 
the various doors that need to open and shut , to direct air this way and 
that depeding on which function you select on the heater control switch.

The heater control switch, activated by the pushbuttons, has two separate 
sections : one is electrical and turns the blower on and varies the speed of 
the blower; the other section is mechanical, and works off engine vaccum . 
The vacuum source is at the rear of the intake manifold - right where the 
power brake vaccum line goes to.  There is a very small vac. line connected 
there - and it runs directly to the heater control switch.  from there, it 
is distributed to two or three dashpots that open and close various doors.

Sounds like your fresh air door, under the dash behind radio, is not working 
and is staying open... you will have to diagnose why.

John


----- Original Message ----- 
From: "Bill Leahy" <bleahy@xxxxxxxxxxx>
To: "David Zakarian" <arshog@xxxxxxxxxxxxxxxxxx>
Cc: "chrysler club" <chrysler300@xxxxxxxxxxxxxxx>
Sent: Sunday, November 13, 2005 2:25 PM
Subject: [Chrysler300] 62 heater


>
> my heater seems to work ok while the car is setting...but as soon as i
> get going a steady rush of cold air comes thru the heater vent.
>
> anyone know what is happening?
>
> thanks for any help.
>
> bill of kennewick, wa
>
>
>
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