[DeTomaso] Heater fan speeds

[Curt Hall]

I know slim and none about this stuff but...
In stead of a low/high speed heater switch rocker, could you hook up some kind of rheostat like on a light dimmer switch? Then you could dial just the fan speed you want.
 
Curt

--- On Mon, 5/4/09, Dave Londry <davel at emspace.com> wrote:

From: Dave Londry <davel at emspace.com>
Subject: Re: [DeTomaso] Heater fan speeds
To: "Charles Engles" <cengles at cox.net>, "DeTomaso Forum" <detomaso at realbig.com>
Date: Monday, May 4, 2009, 8:18 PM

Thanks Charles.
Sounds like whenever you run low speed fan, you get a heater too.
That'd be OK in winter I guess, but with the AC on, low fan sounds like 
a dumb idea.
When I do my wiring ripout I'll see if I can adapt a switching regulator 
for the fan.
That would get rid of the resistor and give a variable-speed fan control.
dave

Charles Engles wrote:
> Dear Dave,
>
>
>                Mike wrote:
> '
>
>> Can anyone tell me what the resistor value was and where it was
located?
>> If I can't sort out the original connection I think I should be
able to
>> switch the same R value into the full-speed line
>> and have it work the same as the original.
>>
>
> I don't know about its characteristics, but it's physical location
is on
> the heater box itself.
> $$$$$$$   Yes, IIRC you need to remove the glove box for best access.  
> The Stock resistor looks like it came out of 1917 rather than 1971.  
> It is about 4 or 5 inches long and about 3/4" diameter on a ceramic 
> base which also holds the heat shield over it.
>
> I remember Chuck Engles had some issues with his; it broke down and 
> caused
> so much resistance that it caught fire!
> $$$$$$$      Ummm, no it did not catch fire, but it did glow red hot 
> and release lots of smoke.  It suddenly became obvious why it came 
> with a formidable heat shield.
>
> If you're going to go through the trouble of sorting out the heater
fan,
> you might as well replace the whole unit with a modern one.   This
> incorporates the resistor inside the motor assembly itself, and it 
> wires up directly to
> the switch.   Typical units are three-speed, so you get to choose 
> which two
> of the three speeds you use.
> $$$$$$$$    I finally got a replacement that worked, but the 
> electrical wizards on the Forum have found at least two or three 
> modern replacements that have to be way better than the funky stock 
> resistor.
>
>
>
>                      Another incident of being electrically 
> challenged, Chuck Engles (not on fire yet)
>
>
>

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