replying to , OkieEngineer wrote:
You nailed it! Under-side coils are impossible to get very clean. And, as they
clog-up with dust, the condenser temps go up, which means the compressor
pressures go way up, shortening the compressor life. The old-style rear
condenser units are WAY more reliable. I've seen them run 40+ years.
It might be true that the fan-cooled coils are more efficient, but that
efficiency will be gone within a month in most households where the coils will
quickly get covered with dust.