How to Change the Heating Element in a Dishwasher?
Changing the heating element in a dishwasher involves disconnecting the power, removing the lower rack and spray arm, accessing the element (usually at the bottom of the tub), disconnecting its wiring, and replacing it with a new one before reassembling the components; the entire process typically takes less than an hour. The key is to ensure the power is off and you have the correct replacement element for your dishwasher model.
Understanding the Dishwasher Heating Element
The heating element in a dishwasher is a crucial component responsible for raising the water temperature during the wash and dry cycles. Without a functioning heating element, your dishes may not be properly sanitized, and the drying process will be significantly less effective, leaving dishes wet and prone to spotting. Knowing how to replace it can save you from costly service calls and extend the life of your appliance.
Benefits of Replacing Your Own Heating Element
Replacing the heating element yourself offers several advantages. Firstly, it’s a significant cost-saving measure compared to hiring a professional appliance repair technician. Parts are generally inexpensive, ranging from $20 to $50, depending on the model. Secondly, it provides a sense of accomplishment and empowers you to handle basic appliance maintenance. Finally, prompt replacement ensures your dishwasher continues to function optimally, preventing the build-up of bacteria and ensuring sparkling clean dishes.
Identifying a Faulty Heating Element
Before replacing the heating element, confirm that it’s indeed the culprit. Common symptoms include:
- Dishes not drying properly.
- Water not hot during the wash cycle.
- The dishwasher taking significantly longer to complete a cycle.
- Error codes related to heating or temperature sensors.
If you suspect the heating element, you can use a multimeter to test its continuity. A reading of infinity or zero indicates a faulty element.
Step-by-Step Guide to Replacing the Heating Element
This guide provides a general overview. Always consult your dishwasher’s service manual for specific instructions.
- Safety First: Disconnect the dishwasher from the power supply. Turn off the circuit breaker dedicated to the dishwasher.
- Access the Dishwasher Interior: Open the dishwasher door.
- Remove the lower dish rack.
- Remove the lower spray arm (usually unscrews or snaps off).
- Locate the Heating Element: The heating element is typically located at the bottom of the dishwasher tub, often encircling the lower spray arm support.
- Disconnect the Wiring:
- Carefully disconnect the wires connected to the heating element terminals.
- Note the wiring configuration before disconnecting (take a picture!).
- Remove the Old Heating Element:
- The element is usually held in place by screws or clips.
- Remove the fasteners to release the element.
- Install the New Heating Element:
- Position the new heating element in place.
- Secure it with the screws or clips.
- Reconnect the Wiring:
- Reattach the wires to the heating element terminals, matching the original configuration.
- Reassemble the Dishwasher:
- Reinstall the lower spray arm.
- Reinstall the lower dish rack.
- Test the Dishwasher:
- Turn on the circuit breaker.
- Run a short test cycle to ensure the heating element is working correctly.
Tools and Materials Needed
- New heating element (matching your dishwasher model)
- Screwdriver (various types, depending on your dishwasher)
- Pliers
- Multimeter (optional, for testing continuity)
- Gloves
- Safety glasses
- Towel or rag
Common Mistakes to Avoid
- Failing to disconnect the power: This is a serious safety hazard.
- Using the wrong replacement part: Ensure the new heating element is compatible with your dishwasher model.
- Forgetting the wiring configuration: Take a photo before disconnecting the wires to avoid incorrect reassembly.
- Overtightening screws: This can damage the element or the dishwasher tub.
- Neglecting safety precautions: Wear gloves and safety glasses to protect yourself from injury.
Troubleshooting After Replacement
If the dishwasher still doesn’t heat up after replacing the element:
- Double-check the wiring connections.
- Test the new heating element with a multimeter to ensure it’s functional.
- Check the high-limit thermostat, which may have tripped.
- Inspect the control board for any signs of damage.
Frequently Asked Questions (FAQs)
How do I find the correct replacement heating element for my dishwasher model?
To find the correct replacement heating element, the best approach is to consult your dishwasher’s model number. You can typically find this number on a sticker or plate located on the inside of the dishwasher door or along the frame. Once you have the model number, search online retailers or appliance parts suppliers. Always verify that the element is compatible with your specific model before purchasing.
Can I use a universal heating element in my dishwasher?
While some “universal” heating elements are available, it’s strongly recommended to use a heating element specifically designed for your dishwasher model. Universal elements may not fit properly, have the correct wattage, or connect correctly to the wiring, potentially leading to inefficient performance or even damage to the dishwasher.
What is the average lifespan of a dishwasher heating element?
The average lifespan of a dishwasher heating element is typically between 5 and 10 years. However, this can vary depending on usage frequency, water hardness, and the quality of the element itself. Regular maintenance, such as cleaning the element and avoiding overloading the dishwasher, can help extend its lifespan.
Is it safe to operate a dishwasher with a faulty heating element?
Operating a dishwasher with a faulty heating element isn’t inherently dangerous, but it can lead to unsanitary conditions due to the lack of proper sanitization. Additionally, it can result in dishes that are not properly dried, increasing the risk of mold and mildew growth. It’s best to repair or replace the heating element as soon as possible.
What is a high-limit thermostat, and how does it relate to the heating element?
The high-limit thermostat is a safety device that prevents the heating element from overheating. If the dishwasher overheats, the thermostat will trip, cutting power to the heating element. If your heating element keeps failing, the high-limit thermostat may be faulty or the dishwasher may have other underlying issues causing overheating.
How can I test the heating element with a multimeter?
To test the heating element with a multimeter, first, disconnect the dishwasher from the power supply. Then, set the multimeter to the ohms (resistance) setting. Place one probe on each terminal of the heating element. A reading of infinity indicates a broken element (no continuity), while a reading of zero indicates a short circuit. A reading within the expected range (usually around 15-30 ohms) suggests the element is functioning correctly.
Can hard water damage the dishwasher heating element?
Yes, hard water can significantly damage the dishwasher heating element. The minerals in hard water, such as calcium and magnesium, can accumulate on the element, forming scale. This scale reduces the element’s efficiency and can eventually cause it to burn out prematurely. Using a water softener or dishwasher detergent with a water softening agent can help mitigate this issue.
How do I prevent scale buildup on the heating element?
To prevent scale buildup, regularly clean your dishwasher with a dishwasher cleaner specifically designed to remove mineral deposits. Also, consider using a dishwasher detergent that contains a water-softening agent. If you have very hard water, installing a water softener for your entire home is the most effective solution.
What other components should I inspect when replacing the heating element?
When replacing the heating element, it’s a good idea to inspect other related components, such as the high-limit thermostat, the wiring connectors, and the temperature sensor. Look for any signs of damage or corrosion. Replacing worn or damaged components at the same time can help prevent future problems.
Is it possible to repair a heating element instead of replacing it?
In most cases, repairing a heating element is not feasible or recommended. Heating elements typically fail due to internal breaks or burnout, which are difficult and often unsafe to repair. Replacing the element is the most reliable and cost-effective solution.
How long does it typically take to replace a dishwasher heating element?
Replacing a dishwasher heating element typically takes less than an hour, especially if you have some experience with basic appliance repair. Allow extra time for troubleshooting if needed. Having the right tools and a clear understanding of the steps involved will help speed up the process.
What are the safety precautions I should take when working on a dishwasher?
The most important safety precaution is to disconnect the dishwasher from the power supply before starting any work. Always turn off the circuit breaker dedicated to the dishwasher. Wear gloves and safety glasses to protect your hands and eyes. Avoid working with wet hands, and be careful when handling electrical wiring. If you’re unsure about any step, consult a qualified appliance repair technician.