Unlike RV roof A/C's these basement A/C's are no longer available and are serviceable. These are basically 2 A/C units in one package. The first stage compressor was so noisy that the RV owners were getting notices from the park from complaints. These units are very common in Winnebago and the now defunct Alpha diesel units. Here is a rundown of the replacement process. Again, apologies to professional A/C service techs, I am just trying my best. Thanks!