[tuga]

Mark,

I cleaned my SCS basement AC units a few years back and it made a big difference. I removed the unit from the coach, opened the top of the metal housing and hosed out the inside being careful not to wet the fan motors, etc.

I also used an acid cleaner on the evaporator and condensor coils; this made them foam up and removed the dirt and grime from the fins. Then I hosed them down with low water pressure & no nozzle. Be sure to thoroughly rinse all of the acid cleaner from the evaporator and condensor coils and fins. That acid may eat thru the copper coils.

They have been working great ever since. Also, change the return air filter (located in the stairwell on my coach) as needed.