Here in FL, my centeral A/C condensor coils freeze up after running
for an hour or so.I haad a repair man check it and found the freeon
was Ok, but said the Evaporator coil was dirty and should be cleaned.
He also said the system didn't have enough return duct area. The
house is at least 25 years old and the current a/c unit is 9.5 years
old. It was working fine with the duct work it has, up until this
The repair man cleaned the coils and I still have the same problem.
Not sure if I want to let him start installing a new duct.
He is coming back this morning .
A near ten-year-old system may not have enough evaporator _fins_ remaining
to be effective any more. That, and the swaging between fins and coil is
probably so corroded that there's poor thermal conductivity fin-to-coil.
If your return was undersized to begin with but everything else was healthy,
it might work OK. But, enter corrosion of the evap, some crud that cannot
effectively be washed out, some reduction of the size and number of fins by
un-judicious use of corrosive "Coil-Brite" type cleaners, a tired, crudded
up indoor fan, ducting so linted up inside that it's like a fur blanket,
the inevitable leaks in ducting, etc...and.... you're ready for a new
I don't know where you live, but if you have sulfurous water in your home or
even nearby, the H2S gas makes the corrosion problem even worse.
Maybe its not what you wanted hear, but nothing lasts forever. On the
bright side, you'll probably enjoy the energy savings you'll get from a
decent new system. Don't just throw it in, though. Let the tech repair all
your ducting, fix leaks, replace flex duct; it can be hard and crispy, and
on the verge of failing, and the new flex has over twice the R-value of the
old material. It won't be cheap, but it's really worth it.
The outdoor condenser coils are freezing up, - or is it the indoor
evaporator coil freezing up.
Is this a Heat Pump?
Many years ago, I found a strainer in several old GE condensers that had
The techs, not knowing how to troubleshoot, would go out and overcharge
them loading the condenser full of liquid.
The condenser coils were aluminum however, there was copper on both
sides of the strainer.
I immediately diagnosed the problem, and back then, blew the overcharge
and removed the plugged strainers.
Removed all dryers, purged the system, installed new filter-dryers,
evacuated the systems and recharged them.
They performed to specs.
He may be correct concerning the Return Air duct, which should improve
Do some reading/learning & examine the ductwork for leaks and proper sizing.
WISDOM PRINCIPLE DIRECTED EMPOWERMENT COMMUNICATIONS -
THE REAL POLITICAL ISSUES and WISDOM BASED PEOPLE EMPOWERMENT
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.