I posted a few days ago concerning my AC problems and the advice I received
from my RV guy. With the continuing question s from others on their AC woes
maybe this may be of help.Basically I was told that my unit failed the
"Delta Test" and
should be replaced. The Delta Test is checking the discharge air temp and
mind was at about 60 degrees which would not keep the trailer cool during
our mid 90 degree days here in Houston. I was also told that they checked to
make sure the Evaporator was clean.
I received a lot of good advice especially from Jim Dunmyer.
----- Original Message -----
From: Jim Dunmyer <[EMAIL PROTECTED]>
Normally, the filter is in the front, the fan pulls the air
> through the coils and pushes it out a vent. So, if they're dirty, it'll
> be in the front where it's easy to see.
>
> This is NOT the case with the condenser, there's no filter there.
>
Jim, well today I was able to get up on the trailer and pull the top and
take a good look at the unit. Without a doubt I am the 1st person to look
inside this one since it came from the factory. Just like in other paces I
found throughout the trailer everything was caked in dirt. The condenser
coils on the fan side were virtually blocked except for a circle in front of
the fan. The evaporator coils were not as bad but by no means clean as I was
told.
I cleaned the condenser coils
with a low pressure water hose after covering the fan motor with a plastic
bag. It looked like the Red River running off my trailer. I also used and
air compressor to blow out the other coils and lightly brushed them as
well. I checked the birdcage blower and all of the blades were full of dirt.
Also, the Allen Set Screw was lose and although the blade could not come off
it did move up and down on the shaft. Its tight now. I put everything back
together except the top and started it up. The results are very good. Its in
the high 90s here today and after a couple of hours I am reading 78 degrees
in the trailer. That is 10 degrees cooler than this time yesterday.
I did not see any evidence of the air short circuiting the coils but I am
going to check further later today. Its hot on top of that trailer.
I am not an AC man, But I am impressed with this Armstrong unit. Twenty Five
years old, no service, no cleaning and its still going. Also I found out
this thing has a heating coil. I guess that is why the thermostat has a heat
setting. I will have to try it to see if it works, but I think I will wait
until fall.
Thanks Jim and everyone else for very good advice. I hope this helps others
with AC problems.
