Water will not drain. Could be a food blockage. Machine will not start any new cycle. Have checked filter....I think...

If the water doesn't drain from your dishwasher, check these:

1. Drain line/air gap--A clog in this part is the usual reason that a dishwasher doesn't drain. Remove the drain line to clear any debris from the hose or hose connection at the household drain line connection. Reattach the hose before starting the dishwasher again.
2. Pump--You can reach the pump from inside the dishwasher. Remove the lower rack, spray arm and support. Look for an impeller, a device that spins around and forces water through the spray arm. This is the wash impeller and beneath it is the drain impeller that pushes the water into the drain port. Replace it if found defective or worn out.
3. Drain valve/solenoid---The drain valve may have a solenoid with lever that sticks or frozen and prevents the dishwasher from draining. Free up the solenoid and lubricate the lever.
4. Belt---A certain brand of dishwasher uses a belt to drive the pump. Replace it if broken or worn out.
5. Motor---Check it if turning or working.Turn the rotor manually to see if stuck and free it up. Replace if defective, it is not serviceable.