[DML] Re: A/C Cycling

["content22207" <brobertson@xxxxxxxxxxxx>]

Actually "sophisticated valving" isn't new at all. They're known as
Thermal Expansion Valves. Every household refrigerator and central or
window A/C unit has had them for decades. Most car manufacturers other
than GM used them too. They yield much smoother and more precise freon
metering than a fixed orifice tube. One of my long term projects is to
convert my DeLo to such a system. I can feel my OEM cooling fans cycle
even at highway speeds!

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, "David Teitelbaum" <jtrealty@xxxx> wrote:
> Just because you have new seals doesn't mean they can't leak. Some
> venders supply seals that fit rather loosely. Wrapping some teflon
> tape around it before you reinstall the injector may help. If the
> supports are leaking I guess you could either put a bead of silicone
> around it or you could remove it and silicone it back in. The A/C
> should cycle, in fact it has to if it is properly set up. If it isn't
> cycling here are some of the things to check:
> Low pressure switch adjustment
> Overcharge of refrigerent
> Obstructed condensor or evaporator
> A problem with one or both cooling fans (wrong direction, loose fan,
> inoperative motor)
> Heater fan not rotating in the correct direction.
> There are other, harder to check things, these are among the most
> common causes. This A/C system does not have the more sophisticated
> valving that newer systems have to prevent the evaporator from going
> below atmospheric and frosting over. To prevent that it has to cycle.
> David Teitelbaum
> vin 10757
> 








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