✔ Confirm it’s a frozen drain (single fixture, slow drain, frost visible) ✔ Never use open flame or harsh chemicals ✔ Locate the freeze by feeling for cold spots or frost ✔ Choose a method: hot water, hair dryer, space heater, salt, or heat tape ✔ Work slowly—plastic pipes are fragile ✔ After thawing, run warm water and check for leaks ✔ Insulate pipes to prevent recurrence