I’ve got a new R22 2-ton split system that was recently installed by another tech. That tech flushed out the lines with compressed air (apparently to “clean” the lines). This appears to have introduced a lot of water into the system. When I got to it the system was not cooling at all with the high side pressure at 350 PSI and the low at 25 PSI. When more freon was added the suction line temperature went up not down. It seems obvious to me that the flow is obstructed by ice on the orifice and that the system needs to be evacuated and vacuumed to remove the water.
Now my question is: do I need to replace the filter-dryer or can I just add another? The existing filter-dryer is in the condenser and seems hard to replace.