How To Fix GE Dishwasher H20 Error: 7 Solutions 

ge dishwasher h20 error code

Owning a GE dishwasher opens the door to a world of sparkling clean dishes.

But if you spot an “H2O” error flashing on your GE dishwasher’s display, don’t think it’s time for retirement.

This error message simply means there’s a water supply issue. The good news?  In many cases, you can troubleshoot and fix the problem yourself.

In this guide, we’ll break down the causes and explore proper fixes for getting your dishwasher back to its sparkling best in no time. So, stay tuned!

Before getting busy with troubleshooting, this guide covers many GE dishwasher model numbers including:

  • Cafe CDT855P2N3S1
  • GE CDT800
  • GDT530PMP4ES
  • GE GDF565
  • GE GDT645

What Does H20 Mean On A GE Dishwasher?

  • Meaning: H20 means a low water situation or insufficient water filling, preventing your GE dishwasher from completing its cleaning cycle.
  • Safety Feature: This error acts as a reminder and safety alert, preventing the appliance from overheating or malfunctioning due to a lack of water.
  • Impact on Use: With the H20 error, the wash cycle may stop. This way, your dishes won’t get the sparkling clean they deserve. Dishes might even emerge rinsed but still dirty.
  • Warning Signs: The H20 error code will typically be displayed on the dishwasher’s control panel. The dishwasher may also flash its screen or beep. Also, look out for starting failures and unexplained pauses in wash cycles.
  • Importance of Addressing: Ignoring this error can lead to further problems like pump damage or clogged components. A quick fix for the H20 error can save you time, money, and a sink full of dirty dishes.

Why Does Your GE Dishwasher Show H20 Error?

When your GE dishwasher flashes an H20, it’s trying to get your attention to the insufficient water supply. So, don’t treat it as a cryptic code. Instead, consider it a cry for help that’s worth undelayed addressing.

Here are some of the common reasons why this GE H20 error message pops on the screen:

1. Insufficient Water Pressure

This problem occurs when the water flowing into your GE dishwasher doesn’t have enough pressure. Low water pressure makes the dishwasher unable to fill efficiently, triggering the H20 error.

2. Faulty Water Inlet Valve

As the name suggests, this valve lets water into your GE dishwasher. This electronic component opens automatically whenever your dishwasher needs water. If it’s malfunctioning, it might not open fully, leading to insufficient water intake. A malfunctioning cold/ hot water valve is usually stuck in the off position and won’t turn back on.

3. Clogged Inlet Hose

This flexible hose acts as a delivery pipe. It carries the incoming water from your house plumbing to the dishwasher. But over time, the filling water leaves some mineral deposits or debris behind. This will clog the hose. This type of obstruction restricts water flow and can lead to the H20 error.

4. Faulty Pressure Sensor

This sensor performs a crucial task by monitoring the water level inside your dishwasher. It detects the water pressure to determine if there’s enough water for the desired cycle option. When this sensor falters, it might send a false signal indicating the dishwasher is already full. This can trigger the H20 error even when there’s not enough water.

5. Problematic Dishwasher’s Water Temperature Sensor Circuit

The temperature sensor provides crucial information on the water temperature inside the appliance throughout the wash cycle. This information helps the dishwasher to control the heating element and ensure the water reaches the appropriate temperature for each cycle.

This sensor has a dedicated circuit that transmits data to the dishwasher’s control board.

When malfunctioning, this circuit may disrupt communication with other sensors, including the pressure sensor.

6. Clogged Sump Area

While not a common cause for the GE dishwasher h20 problem, a clogged sump area can sometimes restrict water flow during the filling process. This leads to incorrect readings of the water level. If this is the real cause behind this error, it affects the function of the built-in float switch won’t activate and the control board may perceive this as a potential overflowing situation.

7. Faulty dishwasher’s door switch

This is another less common cause, but if the control board detects a faulty door switch, it assumes the dishwasher door might not be fully closed. This could cause a possible leak of warm or cold water.

How To Reset GE Dishwasher H20 Error

Sometimes, resetting your GE dishwasher can be your secret weapon in defeating the H20 error.

To reset your dishwasher, press reset on your GE dishwasher, then touch start. Navigate and use options to run a diagnostic cycle, which can often resolve the issue.

If you have a traditional or less advanced model, you can unplug or turn off the breaker for 30 seconds. Then, power it back on.

How To Fix GE Dishwasher H20 Error

If the resetting attempt didn’t work, it’s time to address each potential cause.

1. How To Fix Insufficient Water Supply

This is one of the simplest fixes. All it takes is checking your house’s water supply. Locate the water supply knob under your sink (usually near the dishwasher). Make it fully open if it isn’t. If the pressure remains low, it might be a result of inconsistent water supply in your house. In this case, it’s recommended to contact a plumber to investigate and fix the complex issue.

2. How To Fix Faulty Water Inlet Valve

For proper identification of the water inlet valve problem, you should use a multimeter. Here is what you should do:

  1. Locate the valve. Remove the washer’s lower panel. Identify the valve by determining the hoses that connect your house water supply to the dishwasher – the valve is where those hoses connect.
  2.  Disconnect the bracket and hoses with a plier.
  3. Set your multimeter to the continuity setting. It is marked by the symbol of ohm.
  4. Disconnect the valve’s electrical connector and attach its probes to the appropriate solenoid terminals.
  5. Check the reading. If it is anywhere between 0 and 1, the valve is functional. If not, replacement is necessary.

3. How To Fix Clogged Inlet Hose

  1. Locate the hose. It is either a flexible braided metal hose or a black rubber hose. To find it, track the cold water supply line under your sink. it connects to the dishwasher’s inlet hose at the bottom part of the appliance’s back rear.
  2. Turn off the water supply and disconnect the hose from both ends using pliers. use a bucket to catch any remaining water.
  3. Straighten the hose and inspect for any visible kinks or blockages. Flush the hose with water or use a thin wire to clear any debris.
  4. If this doesn’t clear the issue, opt for a replacement hose.

4. How To Fix Faulty Pressure Sensor

  1. Look for this sensor at the dishwasher’s base. Search for a compact round device. It is also attached to a wiring harness.
  2. Detach the sensor from its wiring and test it with a multimeter.
  3. If the sensor is failed, replace it.

5. How To Fix Dishwasher’s Water Temperature Sensor Circuit

Troubleshooting this component is similar to fixing the pressure sensor. All you should do is:

  1. Find the Sensor: Open the dishwasher’s kickplate to access the bottom basin.
  2. Identify the Sensor: Look for a small, cylindrical component with electrical wires.
  3. Inspect for Issues: Examine for loose connections, signs of corrosion, or damaged wires.
  4. Troubleshoot: Use a screwdriver to secure any loose wires. Ensure they are a snug fit. In case of corrosion, you can use a soft brush to remove corrosion or dirt buildup.
  5. Replace: In case of damaged parts or frayed wires, opt for a replacement sensor circuit.

6. How To Fix Clogged Sump Area

  1. Unplug the dishwasher from the power source.
  2. Find the sump area at the bottom of the dishwasher, beneath the spray arms.
  3. Remove the lower panel and Detach both the float cover and plastic cover preventing you from accessing the area. These covers won’t need any screwdrivers, as you can pry or twist them by hand.
  4. Scoop out any visible particles using a spoon but don’t avoid scratching it.

7. How To Fix Faulty Door Switch

Diagnosing a problematic door switch may require professional intervention. But if you are familiar with a dishwasher’s electrical components of GE dishwasher, you can do the following:

  1. Find the switch on the frame of the dishwasher where the door meets the tub.
  2. Remove the lower panel and scan the area with your eyes for a small box with a wire connector attached to it on the frame where the door closes.
  3. As with any electrical component, test the switch with a multimeter for resistance. Sometimes, visual inspection can show if there is a problem with the switch. If you are positive that the switch is beyond repair, get a new one.


While a GE dishwasher H20 error is frustrating, it doesn’t have to mean a trip to the appliance repair shop.

By understanding the causes behind the error, such as insufficient water pressure, a faulty water inlet valve, clogged inlet hose, faulty pressure sensor, problematic water temperature sensor circuit, clogged sump area, or a faulty dishwasher’s door switch, you can take the necessary steps to fix the problem.

Remember to follow the troubleshooting steps carefully and contact service technicians if needed.

Need help with relevant GE dishwasher problems? Check out our articles on GE dishwasher IH code or GE dishwasher not filling with water!

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