Came home to a hot house today. A/C blower running but condenser unit
not. Smelled of burned electrical wire outside. Discovered in the
non-fused disconnect box remnants of a wasp nest and one of the two
wire to the unit completely severed from a small flash fire within the
box. 40 AMP breaker was not thrown.
Bought a new breaker and a new disconnect and inspected everything -
at condenser and main unit - before re-assembly. (After seeing the
schematic, other than the signal wires to the condenser, I see now
that the two are totally separate.)
It is all running now and appears to be cooling. (Unfortunately, unit
is older than 15 years, so I know I am living on borrowed time.)
Could it be that the wasp nest shorted the condesner's capacitors?
All fire evidence was on the load side of the wiring, not the supply
side. Am I OK to keep my DIY fix?
dannyhindes at yahoo dot com
Condensor and main unit???
What do you mean? Do you mean the outdoor condensor and the indoor evap
That you are indeed....seriously.
Nope..its running isnt it?
Probably not. Most times when we see this, its due to a compressor that is
about to go..however, it didnt throw your breaker....and while thats
actually more common than some would like to admit, its odd..
Now...I can tell you that I cant see it, I cant take amp readings, and so
I might suggest in the strongest sense of the word, that you get a good tech
out and let them go over the unit and check it out....I have seem MANY a
wasps nest in a disconnect, but being that they are made of paper, its a
rare thing that it shorts out anything...ever...
Ok..standard split system, I thought so, but in case someone else was
reading it helps to have the right parts, stated...
No big deal...
Ummm think RUN cap...not all units use a START cap..and even if it is, paper
wont short one like that...and if it had, since most all caps in the units
made in the last 30 years or so, have a constant supply off the contactor,
it would have done alot more than dischargethe cap..
Good idea, but it could be a sign of bigger problems, and your higher than
norm bill, MIGHT, and thats M I G H T be pointing to other issues..
Might, maybe, be covered in a sealant that we use. But, no...prob not a
cause. Thats powered from your 24VAC transformer in the unit in your
attic..not the unit outside..all that does is tell the condensor its time to
close the contactor..
Do...would like to know what he tells you and see how good he really was...
CBHvac (wish you'd use your real name):
You mentioned "running a long time": Yes, it had been running a long
time. We experienced many days of > 100 degrees up until this
occurred, and the electric bill last month was VERY HIGH.
I had a chat with my brother-in-law and he agreed that getting a good
installer is the key - Lennox or York. He said he could save me a
couple hundred with a Lennox family-member discount, but I don't know
that I am going to do it when the day comes. I think I am going to
start my search for the right company now.
I liked your pictures on your website. If I had taken some pictures
of it, I'd post my own experience with ducting off this same unit.
Long story short, one half of the downstairs of our 2-story house has
never heated or cooled well - and it all seemed like a flow problem.
Being that directly overhead was an addition done to the house before
we owned it, I was convinced that there were crushed flex ducting
under the floorboards up there.
I talked the wife into letting me pull up carpet and boards, and I
found that a total of five ducts ranging from 5" to 10" were all
crammed though a floorboard cutout of about 200 SQ inches.
Still haven't called a carpet guy out, though, to fix my peel-back. I
never seem to complete my projects' cosmetics.
Thanks for your help,
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