I had a 3155 that I consistently had problems with. I bought a brand new 3155 this weekend, as the old unit was probably out of warranty and suffering from corrosion.
The new unit seems to have a sensor problem right out of the box. The light is Red as soon as it is plugged in, and the pump runs until the float valve stops it and kicks off the alarm.
The new unit seems to have a sensor problem right out of the box. The light is Red as soon as it is plugged in, and the pump runs until the float valve stops it and kicks off the alarm.