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Posted by hvacrmedic on May 30, 2007, 1:21 pm
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> > > > > I have two central ac units for my house in central NJ. The
> > > > > downstairs unit as always worked fine, but not the upstairs unit which
> > > > > is approx a 100,000 btu unit. I decided to start looking in to it and
> > > > > noticed that the evap coils are not all cold with the upstairs unit.
> > > > > Maybe 1/2 to 3/4's of them are cold and sweating. The suction line
> > > > > doesn't sweat on this unit, but always sweats on the downstairs unit
> > > > > back to the condensor. So, what are the possible reasons so that when
> > > > > I have somone take a look, I have a bit more understanding/knowledge.
> > > > > Thanks, Ben
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> > > > Why do you need to understand it unless you're thinking you can fix it
> > > > yourself. Since you've had the cover off already, I'd say it's a safe
> > > > bet that you're just wanting a freebie. If you just have to know,
> > > > there are precisely two possible reasons for what you're seeing:
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> > > > 1) Undersaturated coil.
> > > > 2) Nothing wrong at all.
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> > > > There are a ton of specific reasons that #1 can occur, and keep in
> > > > mind that not all of those indicate a problem with the system itself.
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> > > > Which of those possibilities do you think we should pick right out of
> > > > our ass for you?
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> > > Wow....
> > > I never imagined what I thought would be a simple quesiton would
> > > invoke so much
> > > hostility. You asked:
> > > 'why do I need to understnd it unless you think you can fix it
> > > yourself. I'd say
> > > it's a safe bet that you're just wanting a freebie'
> > > I wanted to understand because I never thought this system worked
> > > correctly.
> > > It never cooled well. Was never able to keep up with cooling on hot
> > > days and taking a long time in the
> > > evening, after the sun went down, to bring the room to a comfortable
> > > temperature.
> > > So what if I did want what you call a 'freebie' ? Or, what if I just
> > > wanted to have a better understanding so that
> > > I wouldn't need to take the word of a disreputable repair person,
> > > which I have seen plenty of- Hide quoted text -
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> > > - Show quoted text -
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> > If you want to understand, then I suggest a local community college.
> > If you want it fixed, then I suggest you call a reputable service
> > company. If the guy is willing to give you a lesson in hvac while he's
> > there, then you're in luck on both counts. BTW, the previous post
> > wasn't hostile, it was sarcastic. If you don't understand why some of
> > use get cranked up every now and then, then its because you don't have
> > to deal every day with people who think that every problem with a unit
> > is written on some little list that we are given to memorize by our
> > bosses. Contrary to your opinion, one observation doesn't
> > automatically tell us what the problem is anymore than an MD can tell
> > you what's ailing you without performing a few tests. Patient calls
> > the doctor on the phone-- "Doc, I'm nauseated, can you help me
> > understand why that is without me coming in for a checkup"?- Hide quoted
text -
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> > - Show quoted text -
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> I think I could understand the difference.
> Mo Hoaner's response was Sarcastic. Fair enough....
> If I didn't supply enough information, my fault.
> Maybe a simple response like, you didn't supply enough info or what
> really needs to be done is a Service
> Tech, needs to hook up gauges to check the pressures to see if there
> within spec. Or, cut and past a dozen
> questions that you might ask all the time. So I guess what I see here
> is that all the coils not being cold, might or might not indicate a
> problem. Right now I'm leaning towards it being a problem and will
> have someone come out and take a look. All I was trying to do is to
> understand if my unit is working properly or if I should have someone
> come in to take a look or would that in itself be a waste of a hundred
> bucks.- Hide quoted text -
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> - Show quoted text -
In that case, yes you should have someone competent take a look at it.
If it isn't keep up with the load, then there's definitely a problem.
OTOH, there is nothing we can say that will help you understand,
because we don't know ourselves what the problem is. Fair enough?
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