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.
TIA,
Jon