The answer to 'why is my pipe frozen' is that pipes can freeze when exposed to cold temperatures, usually below freezing (32°F or 0°C). This commonly happens in uninsulated pipes, pipes in unheated areas of the home, or pipes running along exterior walls. When water inside the pipe freezes, it expands and can cause the pipe to burst, leading to leaks and water damage.
Some common signs of a frozen pipe include no water coming out of the faucet, frost on the pipe, or the pipe feeling unusually cold to the touch. If you suspect a pipe is frozen, it's best to act quickly to thaw it out before it bursts. You can try using a space heater, hair dryer, or heating pad to gradually warm the pipe. Avoid using open flames, as this can be dangerous. If the pipe has already burst, turn off the main water supply and call a professional plumber to repair the damage.