Cleaning split A/C condenser coils
I have a Trane XE 1000 outdoor unit, nameplate dated 6/91, with 3/8″ dia. Spine Fin coils. The entire outer surface of the coils is covered with lint-like debris. The unit works, i.e. the system makes cold air, but this obviously can’t be good for it’s efficiency. Since we bought the house at the beginning of the year and don’t know how it performs, I plan on having an HVAC contractor inspect, test, adjust, etc. before the hot weather comes (upstate New York). My question is how do you clean this type of coil without damaging the spines? I have air, water, vacuum, and elbow grease available. Or do I just pay the contractor to do it? What would he or she do? Any advice would be greatly appreciated.