Derek Cole explains why AC units fail on the first 90-degree day: the heat forces them to run continuously at full capacity, exposing hidden problems like dirty coils, low refrigerant, weak capacitors, and clogged drain lines that don't show up during mild weather.
Have you ever noticed your air conditioner seems to work fine all during the fall, during the winter, during the spring, but then that first 90-degree day comes and suddenly it quits? Well, it happens all the time, and there's a good reason for it happening. See, the first 90-degree day is a real stress test for your air conditioning system. During the spring, your system only runs for short periods of time. It doesn't have to work very hard. If there's a dirty coil or low refrigerant, a weak capacitor, or a clogged drain line, the system may still appear to be working even though it's starting to fail.
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