"DesignGuy" wrote in message

Tech came out and said the evaporator coil was corroded and was causing
the
leak. The slow degradation of cooling power (versus sudden loss) was
indicatory of a bad evaporator coil, plus he visually observed corrosion.

Surface corrosion does not necessarily mean a leak. Did he use a leak
detector? Did he pinpoint the actual leak? Was it a joint or the tubing?


Cost (parts, labor, installation) was $825. This seems high but wanted to
check to see if in fact it is.

Not that high for a job done right

Also, was told two things can cause corrosion of coil:

1) Running a/c at low outside temperatures.

2) Dirty filters. I change them pretty regularly, every 45 to 60 days.
Again, don't know what first owner of the home did.

Never hear dof all of that. Corrosion is a chemical reaction. Icing may
cause some moisture to helpt it along, but I have my doubt.

I'd get a different tech out for an oinion.