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How to Fix Common Dishwasher Problems
April 3, 2024
-
By
Ethan Clarke
Dishwashers are unsung heroes in the kitchen. Not only do they save us time by washing our dishes but they also save us a significant amount of water.
To give you a better idea, they can save up to 5,000 gallons of water per year, according to the Natural Resources Defense Council.
Like all appliances, however, they can break down over time. Fortunately, many issues are fixable, including those that involve the dishwasher drain, power supply, and water pump.
To find out how to repair these issues, be sure to keep reading!
Troubleshooting Drainage Problems
When the dishwasher doesn’t drain properly, it can create a mess and leave your dishes far from spotless. These issues are often caused by blockages or a broken drain pump.
Fortunately, these issues can be addressed by examining the drain hose, tidying up the dishwasher filter, and evaluating the drain pump. Here’s how to tackle each one.
Assessing the Drain Pump
A faulty drain pump can also prevent your dishwasher from draining properly. When assessing the pump, you’ll need to ensure the dishwasher is switched off and unplugged – remember, safety first.
Follow these steps once it’s powered down:
Step 1: Examine the Drain Pump
Check for a humming noise without impeller movement; that could indicate that something is jamming the pump from rotating
Step 2: Test the Pump’s Functionality
Test the pump’s functionality using a multimeter – a reading in the range of tens to hundreds of ohms is generally considered good
Step 3: Clean the Drain Pump
If the drain pump is not functioning correctly, it may need to be cleaned or replaced. For the former, we recommend using a mixture of baking soda and vinegar.
Supply:
- Multimeter
- Baking soda (optional)
- White vinegar (optional)
- Replacement pump (optional)
Inspecting the Drain Hose
A kinked or blocked drain hose can impede your dishwasher’s draining process, leading to a pool of water at the bottom of your appliance.
Supplies:
- Baking soda
- White vinegar
- Hot water
- Drain hose replacement (optional)
Step 1:
Remove the kickplate at the bottom of the dishwasher. Look for kinks or blockages that could restrict water flow.
Step 2:
If the hose is clogged, clear it with a homemade solution of baking soda and vinegar, followed by hot water to wash away the buildup.
Step 3:
If the hose is kinked, it’s best to replace it completely, ensuring the new hose is installed in a high loop to prevent future issues.
Cleaning the Dishwasher Filter
Just like the lint filter in your dryer, the filter in your dishwasher also needs regular cleaning to function optimally.
It plays an important role too – it traps food particles and prevents them from recirculating onto your dishes during the wash cycle. Otherwise, these trapped particles can accumulate and prevent water from smoothly flowing through your dishwasher over time.
Supplies:
- Dish detergent
- Sponge or soft-bristle brush
- Hot water
Step 1:
Remove the filter and the dishwasher float switch from the dishwasher floor.
Step 2:
Soak the filter in a solution of hot water and dish soap. Using a sponge or brush, scrub the filter to remove trapped debris.
Step 3:
Once clean, replace the filter and dishwasher float switch securely to prevent potential issues.
ACTIVE Dishwasher Cleaner
Keeps your dishwasher clean to help prevent issues.
Restoring Power to Your Dishwasher
Sometimes, your dishwasher might not start, leaving you puzzled and with a load of dirty dishes. This could be due to power-related issues. If you’re facing such a scenario, you might need to check the breaker and evaluate the control panel.
Checking the Breaker
Locating and resetting your breaker can help restore power to your dishwasher.
Supplies:
- Circuit breaker
Step 1:
Find the electrical panel in your house and look for the breaker labelled for your dishwasher.
It should be at least 15 amps to avoid overloading the electrical system
Step 2:
Firmly push the dishwasher breaker to the “OFF” position and then to the “ON” position
This should reset the breaker and restore power to your dishwasher.
Evaluating the Control Panel
The control panel of your dishwasher can give you clues if your dishwasher is refusing to start. Control panel issues may present as blinking lights, non-responsive keys, or complete failure of the dishwasher to start.
You can try resetting the dishwasher by unplugging it for one minute or executing a specific sequence of button presses if the controller board is in error.
If the control panel is confirmed to be faulty, it can be replaced by disconnecting the power, removing the old panel, connecting the new one, and restoring power.
Resolving Door Latch Issues
Another common issue found in many dishwashers is door latch problems. A faulty latch can prevent your dishwasher from running as it relies on a secure latch to start a cycle.
Some common issues include misalignment of the machine, a dirty latch, and a faulty micro switch.
But don’t worry, these problems can be solved by inspecting the door alignment and changing the latch.
Checking the Door Alignment
A level dishwasher is necessary for correct door alignment. Misalignment can cause the door to not close properly, leading to leaks or preventing the dishwasher from starting altogether. To check if your dishwasher is level, use a bubble level. If it isn’t, adjust the leveling legs until the front panel is level.
Replacing a Faulty Latch
A faulty latch can compromise the efficiency of your dishwasher. Signs of a faulty latch include a latch that isn’t catching or a door that needs to be slammed shut.
Replacing the latch involves disconnecting power from the dishwasher, removing the screws from the inner door panel, and installing a new latch. When replacing the latch, ensure it fits tightly and evenly against the door frame without excessive squeezing.
Fixing Water Inlet Valve Issues
The water inlet valve plays a vital role in your dishwasher’s performance by controlling the amount of water that enters the dishwasher.
However, this valve can sometimes malfunction, leading to poor water flow or unusual noises during the filling phase. If you’re facing such issues, you may need to identify the malfunctions and replace the valve.
Identifying Malfunctions
An improperly functioning valve can result in inadequate water for a wash cycle, with the dishwasher filling too slowly or not at all.
To diagnose these problems, first disconnect the dishwasher from the power and water supply, and test the valve’s terminals with an ohmmeter. A reading of infinity indicates a failed solenoid.
If the ohmmeter test is normal, inspect the inlet valve for clogs from food debris or sediment and clean without disassembling the valve.
Replacing the Water Inlet Valve
If your water inlet valve is leaking or producing poor water flow, it may need to be replaced. Make sure to switch off the water supply before starting the replacement process to prevent flooding.
Replacing a water inlet valve involves disconnecting the pipes from the existing valves and installing the correct replacement.
Enhancing Dishwasher Spray Arm Performance
The spray arm of your dishwasher plays a significant role in cleaning your dishes effectively. It dispenses water onto the dishes during the wash cycle, helping to remove food debris. However, over time, the spray arm can become clogged, leading to less effective cleaning.
Regular cleaning and necessary adjustments or replacements can enhance your dishwasher’s spray arm performance.
Cleaning the Dishwasher Spray Arm
The spray arm of your dishwasher is prone to clogging due to food particles. To clean it, follow these steps:
- Remove the spray arm
- Wash it thoroughly with water and a mild household detergent
- Clear out the holes with a tapered object like the end of a pencil or a wood manicure stick
Cleaning the spray arm regularly will not only enhance its performance but will also extend its lifespan.
Adjusting or Replacing Spray Arms
Sometimes, cleaning the spray arm might not be enough, and you might need to adjust or replace it for optimal cleaning performance.
The adjustment or replacement process can vary depending on your dishwasher model, so it’s essential to refer to your manufacturer’s manual for specific instructions.
Addressing Water Leaks
A leaking dishwasher can cause water damage to your kitchen and potentially lead to more serious issues. Leaks can occur due to various reasons, including issues with the door gasket seal and hose connections.
Sealing the Door Gasket
The dishwasher gasket creates a watertight seal around the dishwasher door, preventing water from leaking out during a wash cycle.
A damaged or worn-out gasket can result in leaks. If you notice any signs of damage, such as tears or wear on your dishwasher gasket, it’s time to replace it. A new gasket can be purchased from an appliance parts store and replaced following the provided instructions.
Optimizing Dishwasher Water Temperature
Water temperature is a crucial factor in your dishwasher’s cleaning process.
The water entering the dishwasher should be at the right temperature to ensure effective cleaning and prevent damage to dishes. If your dishwasher’s water temperature is not optimal, you might need to verify your water heater settings and test the heating element.
Verifying Water Heater Settings
The temperature of the water entering your dishwasher is determined by your household water heater settings.
If the water temperature going into the dishwasher is insufficient, the dishwasher might not perform optimally during wash and dry cycles. To ensure the dishwasher gets suitable temperature water, you may need to adjust your water heater for a higher temperature output.
Running the hot water faucet until it gets hot before starting the dishwasher can remedy situations where the water heater is located far from the dishwasher.
Testing the Heating Element
The heating element in your dishwasher helps increase the water temperature during the wash cycle and dry your dishes at the end of the cycle. Testing the heating element can help you ensure it’s working correctly and maintaining the right water temperature.
We recommend using a multimeter set to ohms to measure the heating element’s resistance.
A reading between 13 and 30 ohms indicates a functioning element, whereas a reading outside this range suggests a faulty element. If the heating element is faulty, you’ll need to replace it.
Maintaining Your Dishwasher Motor
The motor in your dishwasher is the heart of the appliance. It powers the pump to spray water on the dishes and drain the water after the cleaning cycle. Maintaining it is key to ensuring your dishwasher’s long life and top performance.
Clearing Obstructions from the Motor
Over time, pieces of food or debris can get stuck to the motor magnet, causing imbalances and affecting the motor’s performance.
You can clear obstructions by removing the baseplate and unscrewing the anti-flood float switch to check for debris in the drain pump impeller. After removing any obstructions, manually spin the impeller to ensure free movement before reassembly.
When to Contact an Appliance Repair Professional
Do-it-yourself fixes can solve many common dishwasher issues, sometimes professional help will be necessary.
For example, if the dishwasher continues to malfunction despite your troubleshooting efforts, you should call a professional for a possible pump, timer, or motherboard problem, or to seek dishwasher repair services.
Dishwasher Repair – Overview
Owning a dishwasher can be a real time-saver, but like all appliances, it can sometimes face issues.
From drainage problems and door latch difficulties to water inlet valve issues and power disruptions, these common dishwasher problems can often be fixed with a little DIY know-how.
Armed with the knowledge from this guide, you can tackle these issues head-on, maintain the longevity of your dishwasher, and ensure it continues to provide you with clean and sparkling dishes!
Key Takeaways
- Common dishwasher problems like drainage issues, door latch troubles, and water inlet valve malfunctions can often be resolved with DIY repairs, such as inspecting hoses, cleaning filters, realigning doors, and replacing faulty parts
- Regular maintenance such as cleaning the spray arm, ensuring the water temperature is optimal, and inspecting the motor will enhance the dishwasher’s performance and extend its lifespan
- While many dishwasher issues can be troubleshooted and fixed at home, some problems like repeated circuit breaker tripping, mysterious leaks, or motor faults may require the assistance of a professional appliance repair technician or electrician.
Fixing a Dishwasher – Frequently Asked Questions
What is the most common dishwasher fault?
The most common dishwasher fault is a lack of water flow or a clogged drain, which can be caused by blockages in the line, a faulty water inlet valve, or a broken pump motor.
Can I fix my dishwasher myself?
Yes, you can fix most dishwasher malfunctions yourself, by replacing parts as a unit, which can be easier and less expensive than hiring a professional.
Why is my dishwasher not draining?
Your dishwasher may not be draining due to a full garbage disposal, incorrect detergent causing suds, blockages, or a faulty drain pump. It’s important to check these potential causes to ensure proper draining.
What could be causing my dishwasher door latch problems?
The most common causes of dishwasher door latch problems are misalignment, a dirty latch, a sticking out dishwasher rack, a faulty micro switch, mechanical hinge or spring issues, and a failing gasket seal.
These issues can prevent the door from closing properly and may need to be addressed for the latch to function correctly.
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Ethan Clarke
Ethan Clarke is a seasoned expert in appliances and household waste systems. Referencing his extensive experience as an appliance repairman, Ethan shares his invaluable knowledge through detailed maintenance & troubleshooting manuals. Ethan’s insights help homeowners understand and maintain their appliances efficiently, ensuring longevity and optimal performance. He’s here to provide practical, easy-to-follow advice for all your appliance needs.
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