My house is about three years old

The float arm could be stuck or the float switch could be bad. Try to shake the ejector exit line to see if the arm can be dropped. If not, you'll need to pull the top. STINKY!

ma0641 is bang on. Check the float switch. Has the pit been full or has the pump been running dry? Back tom you. Tom

The pump had been running wet.I unplugged it and plugged it back up and it stopped running.Thanks for the help.

Thanks for the help.I unplugged it and plugged it back up and it stopped running thanks again.

Thanks for the help.