Why dishwasher sr24c keep running

SOURCE: Where do I get a lower door gasket for a Hobart SR24C dishwasher?

If I'm not mistaken, there is no lower door gasket. Typically, DW doors don't seal. Due to the temp of the water, when you load a rack a burst of cold air is also loaded in the machine. The DW starts a cycle and cause the air to warm and expand. The doors will always gurgle during a cycle.

The key to reducing this is to make sure the level of the unit it proper. Slightly higher in front. The front lower channel should guide the water back into the unit. Also, don't leave the door open unless you're removing or starting a rack. The warmer the cavity stays, the less the air will expand.

SOURCE: Hobart SR24C-4 Dishwasher can't drain completely

If this is a new occurance, and not "since it was installed", it may be the drain impellor. Little fins on top of the impellor sometimes get worn off. It is under the lower wash arm in the pump housing. The only trick to taking the pump apart is not loosing any of the shims.

Go to page 12.
http://www.hobartlink.com/extranet/extranetmanualsandcatalogs.nsf/860F7951C087BD7F85256D36004978EA/$File/F43078.pdf

Also, (and most likely if the unit looses water during the wash cycle), any obstruction to the drain valve can cause it to not drain proper. The drain valve uses a little flapper valve to drain the unit. It has a rubber stopper that needs to properly close. The drain valve is at the front of the unit with a red coil and white plastic body. It needs to be closely inspected. (page 22)

If this is a problem since it has been installed, it is likely due to the running of the external drain line. (Too high)