Starting to get warm in Atlanta, so I tested my 22-year-old Carrier SX
A/C system. Performance is low. At 80 degrees outside, it can't cool
the house lower than 74.
I checked the charge level:
(Condenser inlet air temp, across chart to suction pressure line, then
down to suction line temperature. ) It's within 2 degrees of target
using a Fluke dual thermocouple thermometer.
(Suction line temp measured just before it enters the
Temperature drop across the evaporator (if it matters) is 67.0 inlet,
51.2 outlet,. with a 75 degree outdoor temp.
Temp difference across the condenser is about 17 deg.
Never had any issues with it in the past 22 years.. Any thoughts on
what else it might be?
(If call a servicer, they'll probably just try to sell me a whole new
system instead of fixing the old one..)
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