Wilo WCC17-20.50 - User Manual

Questions and Answers

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James RothJul 26, 2025
What to do if my Wilo WCC17-20.50 does not start?
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  Patrick 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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Terry RobertsAug 2, 2025
What to do if my Wilo WCC17-20.50 will not shut off?
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  Michael RobinsonAug 2, 2025
  If your Wilo Water Pump will not shut off, it could be due to a defective float switch, in which case you should replace the switch. Another potential cause is an obstructed float; removing the obstruction should resolve the issue.
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James BaileyAug 9, 2025
Why my Wilo WCC17-20.50 operates but pumps little or no water?
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  Mary MartinezAug 9, 2025
  If your Wilo Water Pump operates but pumps little or no water, it could be due to several reasons. Start by checking for any debris caught in the impeller or pipe and clean it out. Inspect the check valve to ensure it's properly installed and not stuck. Also, verify that the anti-airlock hole is not blocked and clear any blockage. Additionally, check for any debris caught in the discharge and remove it. Finally, the impeller might be broken, in which case you should replace it.
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Keith RaymondAug 18, 2025
Why does my Wilo WCC17-20.50 Water Pump start and stop too often?
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  Allison FrostAug 18, 2025
  If your Wilo Water Pump starts and stops too often, it could be due to backflow of water from the piping, so you should replace the check valve. Another potential cause is a leaking check valve, which also requires replacement. Lastly, a failed float switch can cause this issue, and replacing the switch should resolve it.