F1 Rinse LED
Indicates The bottom controller flood sensor detector has been •
The lid is not closin
Tub is Overfilling
It is Foaming.
Not draining.properly
Lid seal damaged.
Dispenser or water softener or their seals leaking.
Damaged water inlet or drain hoses.
Leaking heater plate or motor seals, or drain o-ring seals.
Yoke jammed or broken.
Inlet hose to inlet valve connection loose.
Inlet valve body leak.
Heater plate damage (chipped enamel).
Dry F1 - PCB mains filter,harness or connectors,electronic controller activated for more than six seconds
F1 Flood Detected
The bottom controller flood detector circuit has been activated.The product will abort the wash program, log the fault, start the drain pump,and report to the user.Neither tub can be used until the fault is cleared
PRIMARY ACTION- Determine if a flood actually occurred? Is there water in the base of the machine?

SECONDARY ACTION If water in base.- Determine where the water has come from, check the following:Check for the lid not closing (lid actuators), overfilling (spray arm correctly fitted and flapper shutting off, rotor correctly fitted) or foaming (rinse aid spillor wrong detergent (liquid or tablets) used, not draining (rotor or motor housing damaged, drain hose blocked / crushed), lid seal damaged,dispenser or water softener seals leaking, damaged fill or drain hoses, tub leaking around heater plate or motor seals, drain hose o-ring at connection to motor, yoke pegs broken or yoke jammed at front or rear, over size dishes, inlet hose connection to water inlet valve leak (washer not fitted,connection not tight) water inlet valve not shutting off.- Mop up water in the chassis base before attempting to restart

TERTIARY ACTION If no water in base- Check the chassis harness connection to the PCB mains filter.- Check for corrosion/dirt around the flood sensor on the side of the mains filter housing.- Replace the PCB mains filter.

The dynamo dishwashing stuff has caused foaming which reached the base of the dishdrawer unit causing the flood switch to trip. This gives F1 error.
Not sure how much foaming has occured.

Best to turn off power and take power cable out from socket. then empty the drawer using towels. pull out the bottom drawer and wait a day or so to let the foam disappear from the bottom of dishwasher (under the bottom drawer). Connect the power and see if F1 had gone. If not, you need more work. Post a comment based on the above suggestion and I will guide you further if required. Always use Finish dishwasher power only (recommended quantity) as the drawers are small and don't need much detergent.