I've had a Mitsubishi Electric MS-A12WA that has worked well for the past 5 years unless it freezes or the filter gets too dirty. Then it starts dripping inside and near/on computers! I typically start to hear ice chips inside the unit and it spits out ice/snow when this happens. Then I turn it off and I get close to a gallon of water that drips out of the unit.
There is a drain to the outside, but the installer said that it either fills up with dirt or when it's very cold the drain line freezes.
They are recommending replacing the unit with one that has logic that adjusts the fan and refrigerant when it's freezing outside, and increasing the drain pipe size plus wrapping it with heat tape.
The size of this unit is perfect. It keeps the office easily at 70 degrees. It's 90 degrees in here if/when I turn it off.
However, it I am going to replace the entire thing, I want to make sure I get something that will work as well as it can, with as minimal maintenance as possible, and with the least likely ability to drip inside.
Are there any self-cleaning A/C units that will run even when it's 0 degrees outside? What unit would you recommend I replace it with?