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Posted by Noon-Air on May 24, 2008, 1:13 pm
> Hi all-
>
> I have a question concerning my old (1993)Trane 1400XL. As it's gotten
> hotter out it seems to be running longer, and not blowing quite as cool as
> I remember it being this time last year. It normally has a duct temp of
> 55-58, but it will now rise up to 61-63 during the peak of the day (about
> 95 outside). Being I was in the trade eons ago,and still having some of my
> equipment, I decided to hook my gauges to it and see where it was at. The
> high side was around 225, the low around 80, and the superheat fell right
> in the middle of the chart for the unit (10 degrees). Just as I went to
> remove the gauges I heard a buzzing that sounded like a relay. The moment
> the buzzing started the superheat reading fell to within 2 degrees which
> is obviously outside the acceptable range. After a few minutes the buzzing
> stops and the superheat reading goes back to normal. It seems to repeat
> this cycle every 5-10 min day or night. My question is- is this normal for
> this unit or may I have a problem?
>
> PS- Before you guys hammer me for being a DIY'er, I have no intentions of
> doing anything further myself. If this operation is not normal I will be
> calling Trane out next week.
Is it a TXV system??
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