I have seen metal baseboards but it looks like a huge pain to install and 1x6 finger joint pine is rather inexpensive from a lumber yard (not home depot).

Also, it could be dirty coils not allowing the water to drain down the coils properly to the drain pan/pipe. 

While they are they, have them vacuum the coils (if it is an older fridge with the coils on the back) and under the fridge ... and then remind the tenant they should be doing this 2-4 times per year.Alternatively, have them compile their service wish list and make a single visit to attend to it all.

It could be almost anything ranging from a weak breaker, a short, high amp pull from the compressor due to dirty condenser coils, high amp pull from the compressor because it is going bad, absence of a 3 or 5 minute relay so the unit cycles to early, etc.

@Jean BolgerI could use bright yellow paper and metallic pen to write out my contact info.

Anybody watching will see lack of opportunity.Across the street, metal thieves took the steel metal frame holding up the Coldwell Banker For Sale sign.

Those self-education activities and numerous blogs, technical charting books, ETFs, index funds, 24/5 futures, fx, metals, commodities, energies, cyclical methods, moon phases, sun spots studies, etc made me feel like I am some sort of small authority so out of hobby started working on market charts to make those theories put to work in real life just for fun.

I recommend replacing it with a standard coil-top if you can afford it.

In Pittsburgh I pay $2,000 for new AC/coil. 

I think metal looks the best these days and is the simplest to put on.