I had a 5 ton Trane XLi16 (handler and compressor), electronic air filter and programmable thermostat installed in 11/2004. I have had nothing but problems since day 1. The coil has been replaced 3 times, most recently in 8/2007. Every time a leak was found and after contacting the owner directly did I get the problem rectified. The culprit? The system was never charged to specification.
Since the problem was fixed the system cooled just fine. My electric bills dropped as well. I recently had a preventive maintenance call and the tech said the coil was dirty. How can this be after just 5 months? When I asked him how often a coil should need to be cleaned he said after 1-2 years. Does this sound legit? I keep the electronic air cleaner clean so there is never any dust build up.
He also said there was mold forming where the electrical wiring is housed in the top part of the unit. He removed the top door so I could see. It looked more like mildew to me. How can this happen if the unit is supposedly a sealed unit and is maintained twice a year?
Any help or suggestions are greatly appreciated.