On Mon, 25 Jun 2007 19:31:53 -0700, wrote:

Hello all, I am hopng someone can help. My central air system works
fine for a few hours, but then after (approx 8 hours or so) it is no
longer blowing air out of the vents in the ceiling. The system is
running as it should, compressor fan outside is still spinning and it
sounds like it should be working, but no air is coming out, although
the vent does still seem cold, no air is coming out of it. The only
way to get it to work again is to turn the system off for about 2
hours, then when I turn it back on it is working normally. Could
something be freezing up?

Yes, I think, but that would be an effect of the inside fan not
blowing, not a cause of it. No amount of freezing would stop air from
coming out of the vents if the fan were running. (although don't
depend on me. You can and should verify this by going to the furance
and listening to tell if the fan is running or not.)

Has anyone heard or seen this before,

Not me, but...

anything I can look at?

Anything can happen, and there is always something to look at.

How about turning your thermostat fan co;ntrol to On instead of Auto,
and see if the fan runs then? If it does, then there's somewthing
wrong with the auto part. If it doesn't, there's something wrong with
the fan or the fan circuit.

How much are you willing to do in order to fix it?

If it's the auto part, you could scrape by by leaving the fan on On,
not auto, but I would hate that because I hate the noise of the fan,
and it wastes electricity imo.

Assuming it's the fan and not the auto, I guess a simple thing would
be, when the fan isn't working during that two hour period you
describe, especially the earliest part of it, since you don't know
exactly when it starts working again, to find the two wires from teh
control unit to the indoor fan and check for continuity through the
fan and the wires to it. You probably have to disconnect one of the
two wires to do this. Have we reached your limit or do you want more?

Thanks in advance...