On 6/12/2010 8:54 PM, Tony Hwang wrote:
Hi,
After days of lousy wet weather sun came out today and got hot.
a/c just kicked in this afternoon. Air cleaner is cleaned, filter
is replaced. All looks, sounds alright. Measured temp. between cold air
coming out and warm air returing at the upstairs registers. ~17 deg. F
Is it Okay? Or need to call for service?
TIA,

When was your system last cleaned by an HVAC company tech?
If the condenser fins are clogged or dirty, the AC will be
less efficient.

TDD