Even a high-quality split-system can cool poorly, leak, or fail early if installation is done with mistakes. In Glendale, where summer loads are high, small errors quickly turn into callbacks and costly repairs. Below are the most frequent problems we see with split AC installations—especially in drainage, refrigerant line routing (the “line set” or трасса), and vacuuming. 1) Drainage (condensate) mistakes. The drain line must have a continuous downward slope and a clear termination point. Common errors include back-pitched sections, “sags” that trap water, missing insulation on cold sections, or tying the drain into plumbing incorrectly. These issues cause dripping indoors, musty odors, algae growth, and even water damage. A proper trap (when required) and an accessible clean-out help prevent clogs. 2) Line set routing errors. Copper tubing should be sized correctly, protected from kinks, and supported so it doesn’t vibrate. Bad practices include excessive length, sharp bends, poor flare preparation, mixing incompatible fittings, or leaving lines exposed to sun without insulation/UV protection. Improper routing can create noise, restrict refrigerant flow, reduce efficiency, and increase the risk of leaks at joints. 3) Skipping vacuuming (evacuation). One of the most damaging shortcuts is charging the system without a deep vacuum. Air and moisture left inside lead to acid formation, compressor damage, icing, and unstable pressures. Proper evacuation with a vacuum pump and a micron gauge ensures the system is dry and tight before releasing refrigerant. If your AC shows water leaks, weak cooling, or unusual sounds after installation, it’s worth checking these three areas first. Correct installation is not only comfort—it’s reliability, efficiency, and a longer system life in Glendale conditions.
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