H2o sensor not adding water

It sounds like there may be an issue with the water system on your Lincat CombiMaster Plus combi oven. Here are some troubleshooting steps you can try:

1. Check the water level: Make sure that the water level in the tank is sufficient and not too low. If the water level is too low, it can cause the "H2O" warning to be displayed.
2. Check the water inlet: Make sure that the water inlet is not clogged or obstructed and is able to provide a steady flow of water to the oven.
3. Check the water pump: If your oven has a water pump, make sure that it is functioning properly and is not damaged. A damaged water pump can cause the "H2O" warning to be displayed.
4. Check the water hose: Make sure that the water hose is properly connected and not kinked or damaged. A damaged water hose can cause water to leak out of the oven.

If these troubleshooting steps do not resolve the issue, it is possible that there is a problem with the water system or another internal component of the oven. In this case, it may be necessary to have the oven repaired or serviced by a professional.

Washer won't run. Display says "H2O Supply" and sounds like it's trying to pump out; water is on, household water supply is good. ... With good water pressure then you have a faulty circuit board that needs replaced.
https://www.justanswer.com/appliance/8m26u-ge-gtwn7450d0ww-top-load-washer-display-says-h2o-supply.html

the h2o sensor may not be the only problem, some thing else is setting off the sensor, a pin hole in the hose, a loose connection, cracked lines, plug lines, blockage of sensor that controls the h2o unit, look at the whole picture, housing, gasket is that area, too much h2o, not enough h2o, gases mixtures + h20's, make sure you have the air pressures sucking and pushing through the line.
you are going to have to a service manual and general information how the h20 system works in that vehicle. test points.

www.ask.com/year/mfg.name/make/model/how/does/H20/system/works/on/vehicle/

h2o is the chemical symbol for water. But if the water keeps running and does not stop, even when the machine is full it could be the machine has a defect level indicator, or the water lock does not work. When the lock even don't closes what you remove the power the lock is defect.

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some one help me pls?

If the flow at the inlet valve is good and then the water comes into the system. Now if the WATER LEVEL SENSOR - normally a pressure switch- does not activate at the preset/chosen level to give the signal to the program controller to switch off the INLET VALVE , it will overflow. So the fault is the water level sensor and showing the error H2O.

Make sure that a fault in any of the cycle will relate to the specified action, so check the command from the program module and then the executing device be it the valve or motor or pump.

Please check the link below:

http://www.repairclinic.com/Washing-Machine-Troubleshooting?red=Washing-Machine-Repair-Help

Thank you for using fixya.

Water level. If it is not getting enough water, the valve may be faulty. Otherwise the water level sensor may be faulty if the machine is emptying itself frequently

the sensor goesw into the header unscrews with two black wires

H2O is the symbol for WATER and probably indicates a WATER related fault on your machine. A pressure switch is the normal way the machines 'sense' when the level is sufficient. Overfilling suggests a faulty switch, which will need to be replaced by a technician. Also, ensure that the machine drains as it should, if not, the pump filter may be blocked.