Otis Singleton
Electric kiln elements are easy to replace and repair, especially with the right instructions. It is important to know when to replace your kiln elements to ensure smooth firing sessions and successful results. Some signs that indicate when it's time to replace your kiln elements include uneven heating, visible signs of damage such as cracks, breaks, or areas where the coil appears burnt out, and increased energy consumption without a corresponding increase in workload. Resistance tests can also help determine the health of kiln elements. When replacing elements, it is recommended to follow the manufacturer's instructions and refer to the kiln's specifications. Additionally, it is suggested to replace all elements simultaneously to prevent another element from failing during the next firing.
| Characteristics | Values |
|---|---|
| How to check if the kiln elements need to be replaced | Turn on the kiln when empty and look inside to see if any elements are dark. You can also use a volt/amp/ohm meter to test each element. |
| How to know if all or some elements need to be replaced | If the element broke due to external factors, it is reasonable to replace only the affected one. If the element wore out, consider replacing them all. |
| How to replace the elements | Unplug the kiln and remove the control box. Use a blowtorch to heat the element and needle-nose pliers to reshape and reposition it back into the channel. |
| How to prevent element failure | It is recommended to have spare elements on hand for your kiln. |
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What You'll Learn
Before replacing, check for signs of damage, like cracks, breaks or burnt coils
Before replacing the elements in your electric kiln, it is important to check for signs of damage. This is crucial for safety reasons and to ensure that your kiln continues to function effectively.
Begin by conducting a visual inspection of the kiln elements. Look out for any visible signs of damage, such as cracks, breaks, or burnt coils. If you notice any of these issues, it is a clear indication that the element needs to be replaced. Pay close attention to the coil spacing and ensure that the coils are standing up straight. Sagging or drooping coils can lead to uneven heating, which may result in inconsistent firing results.
In addition to visual inspection, there are other signs that may indicate failing kiln elements. For example, if your kiln is taking significantly longer than usual to finish a cycle, it could be a sign that the elements are worn out. Aging elements build up resistance, reducing their efficiency and affecting the kiln's ability to reach the desired temperature. This can lead to issues such as under-fired projects, glaze troubles, and kiln failures.
You can also use a volt/amp/ohm meter to test each element and determine if they need to be replaced. These meters can be purchased online or at a local home centre for a reasonable price. Additionally, computer kiln controllers can provide error messages or diagnostics of your electrical system, which can help identify any issues with the elements.
It is recommended to have spare kiln elements on hand, especially if you are a production artist or have commitments to meet. This allows for prompt replacement and minimizes downtime. Remember to always follow the specific instructions provided with the replacement elements and ensure your kiln is disconnected from the mains before performing any maintenance.
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Use a volt/amp/ohm meter to test each element
Using a volt/amp/ohm meter, also known as a multimeter, is a great way to test each element of your electric kiln. You can purchase one of these online or at your local home centre for between $20-$30.
Before you begin, ensure that you have the kiln model, voltage, and phase to order the correct elements for your kiln. It is also important to note that some electrical measurements are done with energised circuits, so if you do not feel comfortable testing energised circuits, do not attempt to do so, as it can be dangerous.
Now, let's get started with the testing process. First, turn off the power to your kiln and set the multimeter to the resistance function, often represented by the symbol Ω. The resistance range can usually be set to several values, but it is recommended to start with the 200 Ohm setting when working on kilns. If you get an OL reading, simply turn the meter up to the next setting and try again. The number displayed on the screen is the resistance in Ohms.
Additionally, checking the amperage through your kiln's controllers can provide valuable information. If your kiln has a green LED display, it likely has a built-in current sensor that can read the amperage going to each section. A section reading 0 amps indicates a bad relay, while a slightly low amperage suggests that your elements may be wearing out or you have a voltage problem.
By following these steps and using a volt/amp/ohm meter, you can effectively test each element of your electric kiln and identify any potential issues. Remember to always prioritize safety when working with electrical equipment.
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Order factory-recommended elements for your kiln model
When ordering replacement elements for your electric kiln, it is essential to follow the manufacturer's recommendations for your specific kiln model. Here are some detailed instructions to guide you through the process:
Firstly, identify the kiln model, voltage, and phase. This information is crucial for ordering the correct elements, as they vary between different kiln models and even within the same kiln. For example, if you own a KM1027 Skutt Kiln, it is designed to fire evenly with hotter top and bottom elements compared to the centre elements. Thus, it is essential to refer to the specific information provided with your kiln.
Secondly, refer to the owner's manual or the manufacturer's website for detailed instructions on replacing the elements. Many manufacturers, such as Skutt, provide helpful resources, including videos and support materials, that guide you through the replacement process. These resources can be found on their websites or YouTube channels.
Thirdly, consider purchasing a volt/amp/ohm meter, which is a tool used by kiln repair professionals to test each element. This device can be bought online or at a local home centre for a reasonable price, typically ranging from $20 to $30.
Additionally, pay attention to the kiln's specifications, such as the number of unique element designs. Most kilns have approximately one element for each cubic foot of interior space. However, there may be instances where you find two or three distinct element designs, depending on their location within the kiln. If you plan to keep spare elements, ensure you have at least one of each design.
Finally, when purchasing replacement elements, follow the instructions provided with them. These instructions are specific to your kiln model and will ensure a safe and efficient installation process.
Remember, even if only one element is faulty, it is generally recommended to replace all the elements simultaneously to prevent the potential failure of another element during the next firing cycle.
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Remove dust and debris with a vacuum
To replace the elements in an electric kiln, you must first ensure that the kiln is turned off and unplugged. It is also important to remove any large pieces of debris or pottery from the kiln before vacuuming.
When vacuuming an electric kiln, it is recommended to use a nozzle with a soft brush attachment on the end. This will help to avoid accidentally damaging the bricks or elements of the kiln. Pay particular attention to the element channels, as debris and dust can become wedged in the elements and cause damage when the kiln is next in use. Be sure to vacuum the base, walls, and sides of the kiln, gently running the vacuum over the elements. It is also important to keep the vacuum nozzle away from the thermocouple and digital controller, as static electricity from the vacuum can affect their function.
If you notice any remaining debris after vacuuming, this can be dislodged gently with a soft, dry paintbrush. This will allow the debris to fall to the base of the kiln, where it can be easily vacuumed up. It is recommended to use a vacuum with a HEPA filter to protect yourself from inhaling dust.
Additionally, it is important to note that kiln elements are the metal coils that circle the kiln, radiating heat through electrical resistance. Over time, these coils corrode, and their resistance increases, leading to a decrease in heat radiation. Eventually, the elements will need to be replaced, which can be done by following the instructions provided with the replacement elements or by seeking guidance from online resources or a kiln repair person.
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Use hand tools like pliers to replace elements
If you are someone who is generally handy with hand tools, like a screwdriver and pliers, you can replace the kiln elements yourself. Before you start, you need to decide whether to replace all of the kiln's elements or just the broken one. It is perfectly okay to replace only the damaged element if that is what you want to do. However, replacing all the elements at the same time is recommended, as another element might fail during the next firing.
If your kiln requires wire pins to hold the elements in place, you will need to use needle-nose pliers to remove the element pins from the angled brick joints. You can then slowly and carefully remove the element. You can use the pliers to remove any element pins that are stuck in the empty channels. After that, you should vacuum the element grooves to remove any debris.
Once the grooves are clean, you can insert the new element. Most elements are pre-stretched to the correct length, so you just need to distribute the element evenly into its groove and pin it into place. Then, connect the elements to the lead wires inside the control box by clamping or crimping the wires. Finally, vacuum the element groove again to ensure that it is clean.
You can also use pliers to re-seat bulging kiln elements. To do this, heat the element until it is glowing hot, then use the pliers to reshape and reposition it back into the channel. Work gradually, moving back and forth from one end of the sag to the other. Once the element has cooled, you can set some element pins to help keep it in place.
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Frequently asked questions
There are several signs that indicate your kiln elements need to be replaced. These include:
- Your kiln is not heating evenly, with some areas hotter or colder than others.
- There are visible signs of damage such as cracks, breaks, or burnt-out coils.
- There is smoke, an electrical smell, or sparks coming from the kiln.
- The kiln's energy consumption has increased without a corresponding increase in workload.
- Resistance tests show that the kiln elements' resistance is significantly higher or lower than the manufacturer's specifications.
Kiln elements typically need to be replaced every few years, depending on usage and maintenance. However, it is recommended to have spare elements on hand as they can break or fail unexpectedly.
Yes, you can replace kiln elements yourself if you are generally handy with hand tools such as screwdrivers and pliers. It is also a good opportunity to get familiar with the inner workings of your kiln. However, always refer to the owner's manual or manufacturer's website for specific instructions and safety information.
The process of replacing kiln elements can vary depending on the model and type of kiln you have. Here are some general steps:
- Unplug the kiln and remove the control box.
- Use a volt/amp/ohm meter or a multimeter to test the resistance of the elements and gauge their condition.
- If the elements are bulging or sagging, you may be able to re-seat them instead of replacing them. Heat the affected area with a blowtorch until it is glowing red, then use needle-nose pliers to reshape and reposition the element back into the channel.
- When replacing elements, follow the instructions provided with the replacement elements specific to your kiln model. Ensure you have the correct elements for your kiln model and install them in the correct positions.
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