Actually, landlords in gov't housing especially, are responsible for providing heat and AC equipment, but that doesn't make them do anything properly. Likewise, if you buy a new unit you should still do what I recommend below, regarding the filter.
If you are sure it is the A/C get someone mechanically-minded to clean it thoroughly by pulling the unit out, unscrewing the air box, and thoroighly cleaning it's interior with bleach-based cleaner. A degreaser, such as Mean Green or Purple Power should be used with a spray bottle in the aluminum fins and squirrel-cage inter fan, and rinsed out with pressurized water or a detachable shower head in the tub. An old hair brush to clean it with, and acomb can be used to put the necessary gaps back in the aluminum fins. A blow-dryer can be used to speed up the drying process after dumping the rinsewater out of the ac unit. Lot's of water remains in the aluminum fins and it WILL make a mess to be mopped up.
Once the unit is replaced, simply measure the square intake area(the entire front, excluding the outflow section) and purchase a couple high-end dust and allergenic 1"" thick filters from the hardware store.
Duct tape the filter to the front panel covering the intake fins, or cut it small enough to fit inside the plastic facing in the space between it and the aluminum fins. You may even have to remove the outer cardboard edge in order to cut the material with scissors or tin snips.
Spraying a good antiseptic 99% allergenic killer directly onto the filter, such as a Lysol or Clorox air cleaner should kill all the allergenics that attach themselves to the filter.
Believe me, you will be surprised how quickly the filter is fouled in the course of weeks.
A/C units are surprisingly disgusting on the inside of the air box after only a year or two, and what gets cleaned out of them may make you want to puke when you see it.
P.S. Tell him to clean it in the bathtub in order to rinse it out thoroughly.
Post Edited (JackLegofAllTrades) : 7/25/2014 11:36:33 AM (GMT-6)