On 7/30/2010 7:00 AM, ransley wrote:
My central AC a 1996 Lennox 3 ton stopped blowing air yesterday, I
looked at the air handler coil and it was frozen, filter is new and a
4" so I let it thaw and ran it without the filter thinking added
airflow would help. In about 40 minutes it froze again. Airflow
unfrozen hasnt changed, its the same out the vents as always so I dont
think the blower is bad or any restrictions. When an old unit leaks
freon is that usualy the end of life of the compressor or air handler,
is it often possible or easy to find and fix a leak without spending
alot. I will call a tech today and I hope the leak is small enough
that it will last the year but a few days ago it was fine. Will I
damage anything running it low on freon for about 30 minute cycles
till it starts to freeze and let it thaw, a bit of cool air still
comes out.

It could be something as simple as leaking valve cores in the
Schrader service valves. I've seen leaks develop years later
because the valve cores were not tightened at the factory or
the installation tech didn't tighten the cores enough when
reinstalling them. Tiny leaks can be handled by a product I've
had good luck with manufactured by Cliplight called SUPER SEAL HVACR.
It's a stop leak for AC systems.

http://www.cliplight.com/hvacr/produ...27&upperCatID=

TDD