Re: [A/S] AC repair needed

Anne,
It is not a matter of anyone changing the voltage. Voltage is a factor of load and wiring. The more people that are connected to a power source, the greater the load. The higher the load, the more the voltage is affected. If the wiring is old or undersized or too many people are trying to use the power, the voltage will sag. The drop can be momentary, ongoing or just an occasional occurrence. There is NOTHING you can do to avoid brown out situations but an autoformer will isolate you from them down to about 90 volts, at which time, not even the autoformer can help.

Once a compressor begins to stall (say momentary low voltage just as it tried to start), it will invariably wind down to a complete stop (that is that groaning sound you heard). An iced up evaporator will reduce the air flow out of the unit, but it will NOT cause the compressor to overload or stall. Another factor that occasionally will cause the compressor to stall is if it attempts to restart too soon after cycling off. It takes about 3 minutes for the pressure differential in the cooling system to equalize so if the compressor attempts to restart in that time period, the high pressure still working against the compressor will prevent it from being able to spin up and it will stall. Your AC does NOT have any electronics on it, so it does not have the auto-lockout feature to preventing the compressor from restarting too soon. If your evaporator was iced up and the AC cycled off, then attempted to restart too soon, that would explain both symptoms. But still, you really need to be on the watch for low voltage as it will screw up an AC faster than just about any other condition.

David T
On Jun 18, 2012, at 9:20 AM, Anne Pearse Hocker wrote:

> Well, I turned the unit off for several hours and after reading David's email,I just tried it again. Seems to be working fine. Not much in the way of humidity right here and I don't have an "auto" switch on the AC, just low, med and high. I did have it on high yesterday and did not change it at night ( never have) so I am wondering if it was park power, and why they would change it late at night? Anyway, we are cooling down and I will keep my meeting short in town to come back and check on everyone. I am also running a couple of small fans inside just in case.
>
> I almost stayed at Hart resort but didn't want to fool with the sales pitch.....wish I had done that now.
>
> Thanks, everyone! I will check on that meter too. I have a kill-a-watt but it was reading 119v last night. Right now it is reading 116.7 with AC and fans running....
>
> I am thinking that a list of reputable RV repair facilities or mobile units across the country would be a huge help. A kind of Angie's List for RV folks based on experience and moderated reviews, but no ads...
>
> Anne
>
> Sent from my iPad which has an erratic spellcheck, so bear with me.
>
> On Jun 18, 2012, at 7:56 AM, Hunter Hampton <airstreamingypsy@gmail.com> wrote:
>
> > On 6/18/2012 8:45 AM, Steve Pfiffner wrote:
> > > I don't know about the groans but the "putting out a very feeble bit of
> > >> > cool air" is very often just a frozen evaporator in high humidity
> > >> > conditions, turn it to fan only for ten minutes and see if your airflow
> > >> > returns.
> > >> >
> > > Steve
> > >
> > >
> > >
> > I was thinking that too.... Anne, when you run the a/c at night do you
> > have it on auto or low or high? I used to run mine on auto and it would
> > do that..... Dave suggested I run it on low and it hasn't done it since.
> >
> > Hunter
> >
> > [Non-text portions of this message have been removed]
> >
> >
>
> [Non-text portions of this message have been removed]
>
>



[Non-text portions of this message have been removed]



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