The main control board of a Whirlpool front-loading washer manages essential functions, including wash cycles, water levels, and spin speeds. When this part malfunctions, it can disrupt the washer’s operation. If you suspect the main control is faulty, this guide will help you test and replace it, ensuring your washer operates efficiently again.
Common Symptoms of a Faulty Main Control Board
If the main control board is malfunctioning, your washer may exhibit one or more of the following symptoms:
- No power or response: The washer doesn’t turn on or respond to button presses, even when plugged in.
- Unresponsive controls: Certain buttons or functions fail to work correctly, or the display behaves erratically.
- Incomplete cycles: The washer may stop mid-cycle or fail to progress to the next phase, such as spinning or draining.
- Error codes: Some Whirlpool models display error codes indicating a problem with the main control board. Check your user manual for a code reference.
- Irregular behavior: The washer might start and stop unexpectedly or skip steps during a wash cycle.
Safety Precautions
When performing maintenance or repairs on appliances, safety is paramount. Follow these guidelines to minimize risks:
- Disconnect power: Unplug the washer or switch off the circuit breaker to avoid electrical hazards.
- Wear protective gear: Use insulated work gloves to shield your hands from sharp edges, pinching points, and debris.
- Ensure proper lighting: Work in a well-lit area to clearly see internal components.
- Organize your workspace: Keep the area clear of clutter, and ensure children and pets are not nearby.
- Avoid wet conditions: Never work with bare, wet hands or in damp surroundings. Ensure the area is completely dry.
- Consult the manual: Refer to your washer’s user manual for specific installation and safety instructions.
- Handle parts gently: Excessive force can damage the appliance or cause injury.
- Protect your eyes: Use safety glasses if there’s dust, chemicals, or debris involved in the repair.
- Cool down heated parts: If the washer was recently in use, wait for heated components to cool before beginning.
- Document connections: Take pictures or notes of wiring and connections before disconnecting to avoid reassembly issues.
- Avoid exposed wires: Do not touch exposed wires or terminals. Use non-conductive tools or insulated gloves if you need to handle wires.
Tools and Materials Needed
- 1/4-inch nut driver
- Flathead screwdriver
- Multimeter
How to Test and Replace the Main Control on a Washer
Access the Main Control
- Unplug the washer or turn off the breaker to ensure there is no power running to the machine.
- Use a 1/4-inch screwdriver to remove the screws at the back of the top panel.
- Slide the panel back and lift it off to access the inside of the washer.
- Set the panel aside.
- Identify the main control positioned between the noise filter and the user interface panel.
Test the Main Control
- Plug the washer back in.
- Set your multimeter to measure AC Volts (denoted by a “V” with a squiggly line).
- Check the pink wires from the noise filter to ensure 120 Volts AC is reaching the main control.
- Switch your multimeter to measure DC Volts (denoted by a “V” with a dotted line).
- Test the UI7 connection by placing one probe on the blue wire at pin 7 and the other on the blue wire at pin 3.
- Verify a reading of 7 Volts DC.
- If 7 Volts DC is not present, the main control has failed and needs replacement.
Remove the Old Main Control
- Disconnect the power cord before proceeding to replace the main control.
- Take a clear photo of the wiring connections for reference during reassembly.
- Carefully disconnect all wires from the main control.
- Use a flathead screwdriver to pry the lock tab at the back of the control away from the wall.
- Slide the control back and pull it out to remove it.
Install the New Main Control
- Align the mounting posts of the new control with the slots on the washer wall.
- Insert the control and pull it forward to lock it into place.
- Refer to the photo taken earlier to reconnect the wires to the new main control in the correct order.
Reassemble the Washer
- Position the top panel back on the washer behind the user interface panel.
- Slide it forward to lock it in place.
- Secure the panel with the screws using the 1/4-inch screwdriver.
Test the Washer
- Plug in the washer or turn the breaker back on.
- Operate a test cycle to ensure the washer is functioning correctly with the new main control.
Tips for Maintaining Your Washer’s Longevity
To keep your Whirlpool front-loading washer in good condition after replacing the control board, consider these maintenance tips:
- Clean the washer regularly: Run an empty cycle with a washer cleaner to prevent mold and residue buildup inside the drum and hoses.
- Check for blockages: Periodically inspect the drain pump filter for clogs and ensure the water inlet screens are free of debris.
- Avoid overloading: Overloading the washer can strain components, including the control board. Follow the manufacturer’s load recommendations.
- Balance the load: Uneven loads can cause excessive vibration, leading to premature wear on internal parts. Distribute items evenly in the drum.
- Use the correct detergent: Stick to high-efficiency (HE) detergent to avoid sudsing issues that can affect the washer’s performance.
- Inspect seals and gaskets: Check the door seal for signs of wear or leaks, and clean it regularly to prevent mold growth.
- Address issues promptly: If you notice unusual noises, vibrations, or errors, troubleshoot and resolve the problem to avoid further damage.
Replacing your Whirlpool washer’s main control board doesn’t have to be a hassle when you know the steps. With a little patience and attention to detail, you can save yourself the cost of a repair service and get your washer back in action.
Just remember to stay safe, follow the tips for maintenance, and keep an eye on your washer’s performance. A little care now can go a long way in avoiding future headaches.