Well, if the air blowing out of the AC (into the room) is rising 25 degrees,
then you very obviously have installed the unit upside down. turn it right
side up, and it will start cooling.

Hint: I've found that a fan blowing TOWARDS the AC cools the room better
than a fan blowing away from the AC.

"Across the coil" means air coming into the unit, and air blowing out. If
the tech support guys say rise, then they mean the outdoor air. Measure
temperature of the air sucking in the side of the AC, and the temperature of
the hot air dumping out the back. Is the hot air noticably hotter than the
air coming in the side?

--

Christopher A. Young
Do good work.
It's longer in the short run
but shorter in the long run.
..
..


"Ranger001" wrote in message
ups.com...
Hi I bought a Frigidaire Window Air Conditioner (FAL124K1A1) in 2001 @
$400.00. At first it worked fine but then, last week it demised. It was
under warranty and was repaired. However since it came back it seems
not to cool effectivly & quickly like it use to. the tech says its ok
but I think different. My question what formula can I use to see if the
unit is working properly? What tools can/do I need/use? I wrote to
Frigidaire and they replied: ".....This is a 12,000 btu unit; it should
have a 20 - 25 temperature rise across the coil. Difference between the
incoming and out blowing air." What does this mean? What does "across
the coil" mean? Please advise, Thanks!