I just experienced my first bilge pump failure. Mine is the Rule 27SA (1100 gpm, automatic water sensing). The circumstances of my failure were odd. I was cleaning the bilge as part of my regular spring routine. I pulled the fuse before before removing the pump to clean the strainer. When I put the pump back into the strainer and replaced the fuse, the pump wouldn’t stop running. I tried several things to no avail. Finally, I called the Xylem/Rule support line. The verdict: the controller board was out and the pump had to be replaced.
In your case, the pump works manually, but not automatically. Those are different wires. The manual (overrid) wire is the one that runs to your switch. The automatic wire runs to is a fuse box that is hot all the time. Check that fuse, if you haven’t. If the fuse is good, try calling the company. But odds are good it is the controller board at that point. The pump is covered by a warranty for three years. (Mine was a bit over 4 years old).
The pumps are expensive! I have a spare that I got when I bought the boat (2019). The spare cost about $36 then. The going price now is between $115 and $150. Westmarine has them on sale right now ($96), and Amazon sells them for about $93 (but shop carefully on Amazon — that price doesn’t always come up readily). Near as I can tell, the pump selling now is unchanged from the same model of four years ago that cost 1/3 or less of the now-going price. I picked up a new one from Westmarine and installed it rather than my backup, since my backup is already out of warranty. Might as well use the new one with a full warranty and keep the new, but out-of-warranty unit as my spare.
Good luck. A silver lining to my experience is that I learned that replacing the pump is a bit of a PITA and at I now know how I will go about it if I ever have to do it “under duress.”
Gini