The answer to 'plumbing repair won't flush' is that there are several common causes, including a clogged toilet, a malfunctioning flush mechanism, or a problem with the plumbing system. Symptoms may include the toilet not flushing properly, water not draining, or a gurgling sound.
For a simple clogged toilet, you can try using a plunger to dislodge the blockage. If that doesn't work, you may need to use a plumber's snake or auger to clear the clog. If the issue is with the flush mechanism, you may need to replace parts like the flapper or flush valve. More complex problems with the plumbing system, such as a blocked sewer line, will likely require a professional plumber to diagnose and repair.