I have my washer and dryer in my basement, with the washer draining to a laundry sink. The laundry sink drains to a pump that takes the water to ground level. Today, the pump stopped working. It still makes sounds, so the electrical part of it is working. But the water doesn't drain from the sink, although there are tiny bubbles that form when I turn on the pump, so it's trying. I don't see any obvious clogs, and when I tried to snake a wire down the drain nothing improved.
Is this something I can fix myself or do I need a plumber?