How to Test Whirlpool Dishwasher Control Board: Essential Steps for DIY Success
What To Know
- The dreaded flashing lights, the refusal to start, or the strange noises might have you wondering if it’s the control board.
- If you have a basic understanding of electronics, you can test individual components on the control board, such as resistors, capacitors, and transistors.
- The control board is usually located behind the control panel or under the dishwasher’s top panel.
Is your Whirlpool dishwasher acting up? The dreaded flashing lights, the refusal to start, or the strange noises might have you wondering if it’s the control board. Knowing how to test a Whirlpool dishwasher control board can save you time, money, and a lot of frustration. This guide will walk you through the process, helping you diagnose the problem and determine whether you need a replacement.
Understanding the Dishwasher Control Board
The control board is the brain of your dishwasher. It receives input from the buttons and dials, processes the information, and sends signals to the various components, like the pump, heating element, and dispenser. When the control board malfunctions, it can lead to a range of issues, including:
- Not Starting: The dishwasher won’t turn on at all.
- Incorrect Cycle Selection: The dishwasher runs the wrong cycle or doesn’t respond to cycle selections.
- Erratic Operation: The dishwasher starts and stops randomly, or cycles run for too long or too short.
- Error Codes: The dishwasher displays error codes on the control panel.
- Noisy Operation: The dishwasher makes unusual noises, such as grinding or clicking.
Safety First: Power and Water
Before you start testing the control board, always disconnect the dishwasher from the power source. Unplug the appliance or turn off the circuit breaker. Also, turn off the water supply to the dishwasher. This is essential for your safety and prevents any accidental shocks or water damage.
Visual Inspection: Look for Clues
Before you dive into testing the control board, take a moment to visually inspect it. Look for:
- Burnt Components: Look for signs of burning, charring, or discoloration on the control board.
- Loose Connections: Check for loose wires, broken connectors, or corrosion on the terminals.
- Physical Damage: Inspect the board for cracks, dents, or any other signs of physical damage.
If you see any of these issues, it’s highly likely the control board is faulty and needs replacement.
Testing the Control Board: The Basics
Testing a dishwasher control board can be complex, but there are some basic checks you can perform:
1. Continuity Test: Use a multimeter to check for continuity between the control board terminals. Continuity means there’s a path for electricity to flow. If there’s no continuity, the circuit is broken, and the control board is likely faulty.
2. Voltage Test: Check the voltage at the control board‘s power supply. The voltage should be within the specified range for the appliance. If the voltage is too low or too high, it can damage the control board.
3. Component Testing: If you have a basic understanding of electronics, you can test individual components on the control board, such as resistors, capacitors, and transistors. However, this requires specialized equipment and knowledge.
Troubleshooting Tips: Common Issues
Here are some specific troubleshooting tips for common issues with Whirlpool dishwasher control boards:
- No Power: Check the power cord, circuit breaker, and outlet. If the power supply is good, check the control board’s fuse.
- No Water Inlet: Check the water inlet valve and the water supply line. Make sure the valve is open and the water pressure is adequate.
- No Drain: Inspect the drain hose for clogs or blockages. Check the drain pump and the drain motor.
- No Heat: Check the heating element and the thermostat. If the heating element is faulty, the control board may not be able to regulate the temperature.
Replacing the Control Board: A Last Resort
If your tests indicate a faulty control board, you’ll need to replace it. Here’s a general guide:
1. Locate the Control Board: The control board is usually located behind the control panel or under the dishwasher’s top panel.
2. Disconnect Power and Water: Turn off the power and water supply to the dishwasher.
3. Remove the Old Board: Carefully remove the old control board, paying attention to the wiring connections.
4. Install the New Board: Connect the new control board to the same wiring connections.
5. Reconnect Power and Water: Turn on the power and water supply to the dishwasher.
6. Test the Dishwasher: Run a cycle to ensure the dishwasher is working correctly.
Beyond the Basics: When to Call a Professional
While testing the control board yourself can be a good starting point, there are situations where it’s best to call a professional appliance technician:
- Advanced Testing: If you don’t have the necessary experience or equipment, it’s best to leave advanced testing to a professional.
- Safety Concerns: If you’re not comfortable working with electrical components, don’t attempt to test or replace the control board yourself.
- Complex Issues: If the dishwasher has multiple problems or you suspect a more serious issue, it’s best to seek professional help.
Moving Forward: Preventative Care
To help prevent future control board issues, here are some preventative measures:
- Regular Cleaning: Clean the dishwasher regularly to prevent food debris and mineral buildup.
- Proper Usage: Avoid overloading the dishwasher and use the correct detergent.
- Water Quality: Hard water can damage the dishwasher’s components. Consider using a water softener.
- Power Surges: Use a surge protector to protect the dishwasher from power surges.
The Final Verdict: Understanding Your Options
Knowing how to test a Whirlpool dishwasher control board can be a valuable skill. It empowers you to diagnose problems, make informed decisions, and potentially save money on repairs. However, remember that safety is paramount. If you’re unsure about any aspect of the process, don’t hesitate to call a qualified appliance technician.
What You Need to Learn
Q: How do I know if the control board is bad?
A: If you see burnt components, loose connections, or physical damage on the board, it’s likely faulty. Testing for continuity and voltage can also help confirm a bad board.
Q: Can I test the control board without removing it?
A: It’s possible to perform some basic tests without removing the control board, but you may need to access specific terminals or components. For a more thorough inspection, you’ll need to remove the board.
Q: Is it safe to test the control board myself?
A: It’s generally safe if you take the necessary precautions, such as disconnecting power and water and using proper safety equipment. However, if you’re not comfortable working with electrical components, it’s best to leave testing to a professional.
Q: How much does a new control board cost?
A: The cost of a new control board varies depending on the model of your dishwasher. You can find replacement boards online or at appliance parts stores.
Q: Can I replace the control board myself?
A: Replacing the control board is a relatively straightforward process, but it requires some basic knowledge of electrical wiring. If you’re comfortable with electrical work, you can likely replace the board yourself. Otherwise, it’s best to hire a professional technician.
