No, you generally do not need to call a licensed plumber to fix a standard leaky faucet, as replacing internal washers, O-rings, or cartridges is an easy beginner-friendly DIY task that takes under 30 minutes with basic hand tools. You should only consider calling a professional if the shutoff valves under your sink are broken, corroded, or fail to turn off completely. Verification: Test the repaired faucet handle after reassembly to confirm zero water leakage.
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