The best course of action when you discover a frozen pipe is to act immediately before it ruptures, starting by turning off your main indoor water supply valve. Open the faucets connected to the frozen lines to relieve internal pressure as ice thaws. Next, locate the frozen section of pipe (often in an exterior wall or unheated crawlspace) and apply gentle supplemental heat using a hair dryer, heating pad, or warm towels wrapped around the pipe. Callout type="warning" title="Hygiene Warning": Never use open flames like blowtorches to thaw frozen pipes, as this creates extreme fire and explosion hazards. Verification: Inspect the thawed pipe carefully for leaks before turning the main water supply back on.
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