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James RothJul 26, 2025
What to do if my Wilo WCC17-20.50 does not start?
- PPatrick MclaughlinJul 26, 2025
If your Wilo Water Pump doesn't start or run, several factors could be at play. Start by checking the basics: a blown fuse (replace it), a tripped breaker (reset it), or a disconnected plug (secure it). Also, a corroded plug can be the culprit, so clean the plug prongs. If the pump experienced thermal overload, unplug it for 30 minutes, then plug it back in. Other potential issues include a clogged impeller (remove the clog), a failed motor (replace the pump), or a failed float (replace the switch). Lastly, ensure the water level is adequate—the pump won't activate unless the water level is over the pump cover and the float switch turns upside down, or the switch is not tangled. In the last case, reposition the pump and ensure the switch moves freely.
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