Error 10 code stops program. Checked underneath - no leaks visible. Checked drainage hoses and traps - all clear. Water clearly visible to left of salt compartment then level rises and beeps start. Any suggestions?

Full 'make model (what it is)' in all question please.

Generic E4 Error fixes

The E4 error code relates to there is too much water via the inlet or a possible leak. You have acted correctly by checking the fitting and joints for leaks.Jun 16, 2021

My dishwasher keeps throwing the code e4. I've checked all

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That normally signifies a leak. Under the machine there is a plastic pan with a sensor in it. However Bosch have a different idea.

https://www.google.com/search?q=Bosch+Series+6+dishwasher+Tap+error+symbol

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If your dishwasher has set off an alarming F06 error code on the digital display, it is likely to be a problem with the water filling the machine.
Check for an intermittant inlet solenoid.

if the hoses are clear I suspect ur have a control board problem

The E20 error code indicates a problem with water drainage. Inspect the drainage hose for kinks that could impede the drainage flow. This frequently occurs when the machine is pushed up against the wall without allowing room for the hoses. If there are no kinks, the hose is probably clogged. Carefully detach the hose from the machine, and use a garden hose to force water through it. If the water doesn't pass through, use a plumber's snake to clear the clog. If there is no clog, inspect the drain pump for clogs. Unplug the machine, and open the small rectangular door towards the bottom of the front of the machine. Drain the pump through the emptying hose into a container until the water flow stops, and rotate the pump impeller to clear any foreign objects. Close the pump and restart the cycle. If the problem persists, contact a service center.

I had a problem like this and it turned out to be the hose that carried the water out to the drain was overflowing the drain pipe.
Make sure the P trap in your drain line is open and clear. A plumbers snake, draino, or a high pressure nozzle on your garden hose might help to clear it.

The problem happens when your installer throws away the drain hose u-bend, and stuffs the hose as far as it will go down the drain pipe. When this happens the end of the hose can get pushed under water, which causes the washer to siphon out the wash water when it fills. This results in an LF "Long Fill" error.
The solution is to get your installer to come back and install the washer properly.

Hi,
The most common cause of an OE error code on a modern LG dishwasher is:
1. Blocked drain hose
2. Obstruction in the sump area (beneath the filter, which needs to be removed to check for onstruction)
3. Failing drain motor. 
else you need to REPLACE THE PCB POWER CONTROL BOARD
Good Luck!!!

The error code HE2= water heater error (The heater element did not getting hot)
Unplug the machine to reset this error.
Try different cycle let see you still getting the same error.