Refrigerant does not get used up during normal AC operation. If cooling fades gradually, a leak is usually the reason rather than a system that simply needs a refill.
The Common Pattern
Cooling may weaken over weeks, fade after ten or fifteen minutes, or perform worse in slow traffic. A chemical smell, hissing near fittings, or oily residue can also point toward a leak.
Proper Repair
Leak detection may use UV dye, an electronic detector, or pressure testing. The correct sequence is to locate and repair the leak, then recharge the system with the measured refrigerant type and quantity. Running low can reduce compressor lubrication and cause further damage.
FAQ
Is an annual refill normal? No. A sealed system should not need regular top-ups.
Can I use a store-bought recharge can? Incorrect refrigerant or pressure can damage the system and does not repair the leak.
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