06-07-2011, 11:21 PM
I am trouble-shooting a HMC024 dual zone mini-split system which uses R22. One of the indoor units seems to be working fine for the last six years. The second unit has a little bit longer line set and all of a sudden it stopped putting out cool air. The fan works fine, but the temperature differential is minimal. Wondering what the most likely cause of this problem would be. Inside units are clean with new filters. Appreciate any help.