Turn off the main water supply
Open nearby faucets to relieve pressure
Locate the frozen section of pipe
Apply gentle heat with a hair dryer
Use an electric heating pad or heat tape
Wrap the pipe with warm towels
Keep cabinet doors open to let warm air reach pipes
Increase indoor heat
Thaw pipes slowly and evenly
Check for leaks as the pipe thaws
Call a plumber if the pipe is inaccessible or damaged