[DeTomaso] front condensor question

[Boyd Casey]

My point was that with the radiator fans running when I would turn on the
ac switch the compressor would go on ( the fans would already be running.
If it's hot enough for AC I would assume that both radiator fans would be
on. Of my two radiator fans one is controlled by an thermostat switch and
the other by a lower thermostat switch ( upper and lower on the radiator) I
guess I could install an over ride switch that would insure that the fan
behind the condenser would turn on when the ac was turned on regardless of
the thermostat switches.


On Tue, Aug 5, 2014 at 6:54 PM, Scott Bell <scott at saccrestorations.net>
wrote:

> You need the fans running with the AC on because when the car is stopped,
> the pressure in the AC system will continue to build
> because there is no cooling happening without the fans running. This will
> cause the system to go into an overpressure situation
> causing the trinary switch to shut off the compressor or a hose to blow if
> there isn't a safety pressure switch installed in the
> system.
>
> -----Original Message-----
> From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of Mike Drew
> via DeTomaso
> Sent: Tuesday, August 05, 2014 3:29 PM
> To: boyd411 at gmail.com; jderyke at aol.com
> Cc: detomaso at poca.com
> Subject: Re: [DeTomaso] front condensor question
>
>
> In a message dated 8/5/14 12 01 28, boyd411 at gmail.com writes:
>
>
> > If both radiator fans run and AC switch is limited to controlling the
> > compressor won't that work? Sometimes my car needs both sucker fans to
> >
> > maintain correct engine operating temp. If the one fan is controlled by
> > the
> > compressor switch wouldn't that limit sufficent radiator cooling to times
> > when AC was also turned on?
> >
>
> >>>You would definitely want the fans to be triggered by the radiator
> thermoswitches OR by the A/C.   Most conventional cars with front-mounted
> A/C
> turn on the radiator fans the moment the A/C system is engaged regardless
> of
> engine temp.
>
> Without anything scientific to back up this suggestion, I would think it
> would be advantageous to have the A/C system turn both fans on at the same
> time; however having the radiator turn the fans on sequentially saves wear
> and
> tear on the #2 fan, perhaps?
>
> Mike
>
>
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-------------- next part --------------
   My point was that with the radiator fans running when I would turn on
   the ac switch the compressor would go on ( the fans would already be
   running. If it's hot enough for AC I would assume that both radiator
   fans would be on. Of my two radiator fans one is controlled by an
   thermostat switch and the other by a lower thermostat switch ( upper
   and lower on the radiator) I guess I could install an over ride switch
   that would insure that the fan behind the condenser would turn on when
   the ac was turned on regardless of the thermostat switches.

   On Tue, Aug 5, 2014 at 6:54 PM, Scott Bell
   <[1]scott at saccrestorations.net> wrote:

     You need the fans running with the AC on because when the car is
     stopped, the pressure in the AC system will continue to build
     because there is no cooling happening without the fans running. This
     will cause the system to go into an overpressure situation
     causing the trinary switch to shut off the compressor or a hose to
     blow if there isn't a safety pressure switch installed in the
     system.

   -----Original Message-----
   From: DeTomaso [mailto:[2]detomaso-bounces at poca.com] On Behalf Of Mike
   Drew via DeTomaso
   Sent: Tuesday, August 05, 2014 3:29 PM
   To: [3]boyd411 at gmail.com; [4]jderyke at aol.com
   Cc: [5]detomaso at poca.com
   Subject: Re: [DeTomaso] front condensor question

   In a message dated 8/5/14 12 01 28, [6]boyd411 at gmail.com writes:
   > If both radiator fans run and AC switch is limited to controlling the
   > compressor won't that work? Sometimes my car needs both sucker fans
   to
   >
   > maintain correct engine operating temp. If the one fan is controlled
   by
   > the
   > compressor switch wouldn't that limit sufficent radiator cooling to
   times
   > when AC was also turned on?
   >
   >>>You would definitely want the fans to be triggered by the radiator
   thermoswitches OR by the A/C. A  Most conventional cars with
   front-mounted A/C
   turn on the radiator fans the moment the A/C system is engaged
   regardless of
   engine temp.
   Without anything scientific to back up this suggestion, I would think
   it
   would be advantageous to have the A/C system turn both fans on at the
   same
   time; however having the radiator turn the fans on sequentially saves
   wear and
   tear on the #2 fan, perhaps?
   Mike

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References

   1. mailto:scott at saccrestorations.net
   2. mailto:detomaso-bounces at poca.com
   3. mailto:boyd411 at gmail.com
   4. mailto:jderyke at aol.com
   5. mailto:detomaso at poca.com
   6. mailto:boyd411 at gmail.com
   7. mailto:DeTomaso at poca.com
   8. http://poca.com/mailman/listinfo/detomaso_poca.com