Water level sensor thinks water is too low to run pump...possibly due to hard water. Is it fixable without too much trouble. I saw something in the manual about bypass. Is this the solution?

1.Loss of water pressure due to pump obstruction. Check for any obstruction at the pump intake.
2.Strainers clogged causing inadequate water supply to pump.
3.something may be inhibiting free movement of the low water float; remove any foreign object from around the low water float or its magnet.

LG DISHWASHER ERROR CODES AND DESCRIPTION MODELS LD 1420W2 D1420WF LD...

ERROR CODES; FAULTS & REMEDY ERROR DISPLAY [IE]
Inlet error.
Condition: Not reached to the normal water level in spite of 10 min. water supply.
Possible causes:

1. The Water Tap is not opened.
2. The Inlet Hose is twisted.
3. The Filter of inlet valve clogged by impure water.
4. The Inlet Water Valve is normal ?
5. The water pressure is very low. ( below 0.5 kgf/ )
6. Inlet valve is blocked by safety device for leakage sensing.(In case of Inlet Valve).

Remedy

• Open the Water Tap.
• Repair the Inlet Hose.

1.Close the Water Tap.
2.Unscrew the Inlet Hose (Inlet Valve side)
3.Clean the Filter of Inlet Valve.
> Replace or repair the Inlet Valve.
> Check the water remain on the base.
1.Check the point of damages and repair or replace the related parts.
2.Disconnect the inlet hose to dishwasher to unlock the safety valve.
ERROR DISPLAY [OE]
Drain error.
Condition: Not fully drained out in spite of 5 min. drain operation.
Possible causes:

1. The Filter clogged.
2. The Drain Hose twistec or blocked.
3. The Drain Pump/Motor or circuit is troubled.

Remedy

• Clean the Filter.
• Remove the cause of twist or block.
• Replace the Drain Pump/Motor or repair the Circuit.

ERROR DISPLAY [E I ]
Leakage error.
Condition: The water level in Tub goes down during operation.
Possible causes:

1. Water leakage in Hose connections.
2. Water is leaked by damages.
3. Impeller of the washing Pump is worn away.
4. The Thermal Protector of the washing motor is functioned

Remedy

• Replace the connections of Hose.
• Check the point of damages and repair or replace the related parts.
• Replace the washing pump.
• Check the applied voltage.

ERROR DISPLAY [ F E ]
Excess error.
Condition: Excessive water is supplied than normal water level.(Automatically drain Pump operated.).
Possible causes:

1. The Inlet Valve is troubled.
2. The Air Break is troubled.
3. The Sensor Assembly is troubled.
4. The Controller is troubled.

Remedy

• Replace the Inlet Valve.
• Replace the air breaker.
• Replace the sensor assembly.
• Repair or replace the controller.

Since you didn't mention the car overheating, it's most likely a wiring problem in the oil pressure/water temp circuit. Just to be safe, check your coolant level and oil level when cold.

Try wiggling the wires on the water temp sensor and oil pressure sensor. Possible the engine computer or wiring running to it is faulty. These sensors may be on on different circuits or interconnected. Hard to tell without a wiring diagram.

Is the check engine light on? If yes, have someone pull the trouble codes and see what you get. Most ECM/PCMs have "hidden" codes that will only show with a scanner.

Are you sure the oil gauge is for temperature and not pressure?

I would check the coolant level too. If you have some air in the system it could cause the water temp issue.

The 'low-water' sensor installed in a bathtub is designed to NOT allow the pump to run without water contacting it.
It sounds as if this is operating as it should.
Once the pump comes on you should be able to touch the "logo" or the on/off button to turn the pump on and off.
If the pump is not turning on/off when the tub is full of water you may be experiencing a problem with the control box under the tub skirt.

Rod
US Parts Center
888-521-6183

Hi Darryl

Usually won't spin until water is drained to a low level.

Wont drain possibly because of blockage or pump blocked or stuck. (A Common Problem in Washing Machines)

So... As for further Troubleshooting
Process of elimination.
Where is Time Wheel set and what does it require to advanced to next stage.

Think of it as a Rotating Timer Switch stopping at each stage to check conditions.
The stages are controlled by sensors like "High Water Level"
The Sensor could be a simple Float Switch... eg. "High Water"

If water is High... Dont allow door to open and don't allow spin.
But do allow Pump to run.
It's all Plain Logic like used in computers (If, Then, Else)

Also Known AsTruth Tables

Good Luck
Truth Table Examples

The most likely causes of a hot running engine are the following:

1. low antifreeze level in the radiator and cooling system.
2. fan not turning on at operating temperature.
3. restrictions in the cooling system such as sediment build up.

Water pumps usually leak when they are bad, and can cause an overheat because of low coolant level.
Check whether the water pump is leaking after topping off the coolant level and running at operating temperature, and then shutting off the car's engine.

Can't search for a manual without model, type, serial, etc numbers...

A few things to take a look at:

1) Oil level / pressure sending unit. This is normally bypassed as long as the start switch is pressed. When engine starts, and switch is released, engine will die if sending unit is defective, or you are low on oil.

2) Exhaust temperature sensors. Older units were notorious for burning these up.

3) Cooling Water Temperature sensor. These cause trouble often, but mostly due to water pump impeller being eaten away by galvanic action and not able to pump water as effecively. End result is water temp higher than normal, which trips the switch, which kills the engine.

4) Alternator (generator) output not as it should. If output doesn't rise to proper level within a few seconds of engine start, the engine will be shut down.

5) Choke not working as it should

6) Bad fuel, bad fuel pump, clogged fuel filter.

The water pump is mounted in the center passenger side of the motor possibly inside with timing belt but if it is leaking you will see the water and coolant in that area.

Hi,
If the car is overheating it could be due to a thermostat which is stuck in the closed position, a failed water pump or just a slack belt driving it. I think there will be a "little" tube carrying coolant from the engine to the coolant expansion tank, and if you run the engine with the filler cap removed you should see water coming through that pipe IF the rump is running. A failed water pump will not necessarily leak, it just won't pump the water round the engine.

Always take care when dealing with a pressurised cooling system on an overheating engine - the water may well be above boiling point.

If you run the engine without coolant the cylinder head may well warp and repair bill will be huge.

Hope this helps you a bit. D