The answer to 'why is my water softener frozen' is that water softeners can freeze in very cold weather, usually below freezing temperatures. This can happen if the softener is located in an unheated or poorly insulated area, like a garage, basement, or outdoor shed. When the water inside the softener tank freezes, it can damage the internal components and prevent the softener from working properly.
Some common signs that your water softener is frozen include a lack of soft water, unusual noises or grinding sounds, and the softener not going through its regular regeneration cycle. If you suspect your softener is frozen, it's important to address the issue quickly to prevent further damage.