The answer to 'how to unclog sewer repair' is to first try a basic plunger or drain snake to dislodge the clog. If that doesn't work, you may need to use a sewer auger or hire a professional plumber to inspect the sewer line and clear the blockage. Sewer clogs can be caused by buildup of debris, tree roots, or other issues in the main sewer line, and require proper tools and expertise to fix properly.
It's important to act quickly when you have a sewer clog, as it can lead to sewage backups and water damage if left untreated. Trying to clear the clog yourself with the right tools is a good first step, but if the clog persists or you're unsure of the cause, it's best to call in a professional plumber to inspect and repair the sewer line.