Originally Posted by GreggL
Not sure the make and model as its placed pretty well out of reach and mostly out of sight. It is however a fully automatic one.
I checked the float switch and that seems to not be the issue.
When I pull the out hose off and drain the pipes it'll shut off. For some reason when the bilge fills up, the last bits of water don't make it all the way up the hose and get stuck in the last few inches. It seems this is the issue. Any thoughts?
If it has a float switch then it is not likely a fully automatic version (these have internal float switches or other mechanisms). Although I have wired a float switch to the fully automatics to temporarily work
around their "behavioral" problems. The ones by Rule
which use "water sensing" techniques rather than a physical switch are the worst.
I suggest you figure out how to gain access to your bilge pump
or relocate it to where you can. Because they do require some maintenance
such as cleaning
the strainer. Which by the way, can also cause the symptoms you are experiencing. If the strainer is clogged with debri, and the float switch is in the "on" position, then the pump can run indefinately because it will move llittle or no water thus the water level will never drop and the float switch will stay in the "on" position or it will drop very slowly. This will probably result in a burnt out bilge pump
(not all have thermal protection circuits)....then you will need to get at it to replace it...something you will need to do sooner or later anyway (probably sooner). So, get access to that bilge pump.
Avoid installing a check-valve if you can because they just create another point of failure. But, as pointed out by another poster, sometimes it is the only practical solution.