Replacing a faulty bottom oven element is a common repair that requires careful attention to safety and a few specific steps. Learning how to replace bottom heating element in oven can save you a significant repair bill and get your appliance baking evenly again. This guide will walk you through the entire process, from diagnosis to the final test, with clear instructions.
Before you touch any tools, the most critical step is safety. You will be working with electrical components, so taking the right precautions is non-negotiable. Let’s start by ensuring you have a safe workspace.
Essential Safety Precautions Before You Begin
Ovens operate on high-voltage electricity, and a mistake can lead to severe shock or fire. Please follow these rules without exception.
- Disconnect the Power: This is the single most important step. Do not just turn the oven off at the control panel. You must completely disconnect the appliance from its power source. For electric ovens, locate your home’s circuit breaker or fuse box and turn off the circuit that supplies power to the oven. For extra safety, use a voltage tester to confirm the power is off at the oven’s terminal block.
- Allow the Oven to Cool: If the oven was recently on, give it plenty of time to cool down. The heating elements and the interior cavity can retain intense heat long after the cycle ends.
- Gather Proper Tools and Parts: Having everything you need within reach prevents you from being tempted to leave the oven partially assembled while you search for something. You’ll typically need a screwdriver set (Phillips and flat-head), nut drivers or socket set, and possibly a putty knife. The correct replacement element is crucial; have your oven’s model number ready to order the exact part.
- Work on a Stable Surface: Ensure the oven door is fully open and supported if necessary. If you need to remove the door for better access, consult your owner’s manual for the specific release mechanism, as it varies by brand.
Diagnosing a Faulty Bottom Heating Element
How can you be sure the bottom bake element is the problem and not the oven thermostat or a wiring issue? Here are the common signs of a failed heating element.
- Visible Damage: The most obvious sign. Look for cracks, blisters, or holes in the metal sheath of the element. Any part of the coil that is visibly broken or sagging indicates failure.
- No Heat During Baking: If you set the oven to bake and it doesn’t get hot, but the broiler (top element) still works, the bottom element is likely the culprit.
- Intermittent Heating: The oven may heat sometimes but not others, or it may fail to reach the set temperature. This can be a sign the element is beginning to fail.
- The Element Doesn’t Glow: Once the oven is set to bake, the bottom element should glow a bright orange-red within a few minutes. If it remains dark or only sections glow, it needs replacement.
how to replace bottom heating element in oven
Now that you’ve confirmed the element is faulty and taken all safety precautions, you can begin the replacement process. The following steps provide a general guide that applies to most electric oven models. Always refer to your appliance’s specific manual for any unique instructions.
Step 1: Accessing the Heating Element
First, you need to reach the mounting points of the element. In most modern ovens, the bake element is installed at the back of the oven cavity and is held in place by two brackets.
- Fully open the oven door. For better access, you may need to remove it. Look for hinges locks on the inside of the door frame; these usually release by lifting a lever or pulling a clip.
- Look at the element where it enters the oven’s back wall. You will see two metal screws or bolts holding a bracket over each end of the element’s loops. These screws go through the oven’s inner liner.
- In some older models, the element might be mounted to the oven floor. If this is the case, you may need to lift up the oven racks and possibly remove a drip pan or other covers to see the mounting hardware.
Step 2: Removing the Old Element
With the mounting hardware visible, you can proceed to disconnect and remove the faulty part.
- Before disconnecting any wires, take a picture with your phone of the wiring connections. This is a helpful reference for reassembly.
- You will see two wires, each connected to a terminal on the element. These are often secured with spade connectors that slide onto the terminals. Some models use screws to hold the wires.
- Gently pull the wire connectors straight off the terminals. Do not pull on the wire itself; wiggle the connector if it’s stubborn. If the connections are screwed, use a screwdriver to loosen them.
- Once the wires are free, use a nut driver or socket to remove the two screws holding the element brackets to the oven wall. Keep these screws safe.
- Carefully maneuver the old element out of the oven cavity. The loops are fragile, so try not to bend them excessively against the oven walls.
Step 3: Installing the New Heating Element
Installation is essentially the reverse of removal, but with a few important checks.
- Position the new element in the oven cavity, guiding the loops through the opening in the back wall. Align the mounting brackets with the screw holes.
- Insert and hand-tighten the two mounting screws. Once they are started, use your tool to snug them down firmly, but avoid over-tightening, which could strip the holes in the oven liner.
- Refer to the photo you took earlier. Connect the oven wires to the correct terminals on the new element. Push the spade connectors on until they are fully seated and feel secure. If your model uses screw terminals, tighten them firmly.
- Give the wires a gentle tug to ensure they are connected properly and won’t come loose during oven operation.
Step 4: Restoring Power and Testing
Do not close up the oven or reassemble any panels yet. You need to perform a preliminary test first.
- Go to your circuit breaker and restore power to the oven.
- Turn the oven on to a bake setting, such as 350 degrees Fahrenheit.
- Within 3-5 minutes, the new bottom heating element should begin to glow evenly along its entire length. Observe it for a full minute to confirm it heats up consistently without any dark spots.
- If the element glows properly, turn the oven off and let it cool. You can then close the door and consider the job complete. If it does not glow, immediately turn the oven off and disconnect the power again to double-check your wiring connections.
What If the Element is Under the Oven Floor?
Some oven designs, particularly in older ranges, have the bake element located beneath the oven floor panel. Replacing it involves a slightly different process.
Accessing a Floor-Mounted Element
You will typically need to open the broiler drawer or storage drawer at the bottom of the range to access the compartment underneath the oven.
- Remove any contents and fully extend the drawer. Look for a release mechanism that allows you to lift the drawer up and out of its slides.
- Once the drawer is removed, you will see the underside of the oven. You may see a metal cover plate held by screws; removing this plate exposes the bake element and its connections.
- The removal and installation steps for the element itself are similar: disconnect wires, remove mounting screws, and reverse the process with the new part. The space is more confined, so work carefully.
Troubleshooting Common Replacement Issues
Sometimes, things don’t go perfectly smoothly. Here are solutions to frequent problems DIYers encounter.
- The New Element Still Doesn’t Heat: This points to a problem beyond the element. The issue could be a blown thermal fuse, a faulty oven thermostat, or a broken bake switch on the control board. Professional diagnosis may be needed.
- The Mounting Screws Are Rusted or Stripped: Apply a penetrating oil like WD-40 to rusted screws and let it sit for 15 minutes before trying again. For stripped screws, you may need to use a screw extractor tool.
- The Wire Connectors Are Loose or Corroded: If the spade connectors feel loose on the new element’s terminals, you can gently squeeze them with pliers for a tighter fit. If they are corroded, it’s best to cut the wire, strip a new section, and install a new high-temperature spade connector.
- You Accidentally Bent the Element: The metal sheath is delicate. While you can gently straighten a minor bend, a significant kink can damage the internal coil. If you’ve bent it severely, it’s safer to order a new replacement to avoid premature failure.
Preventive Maintenance for Your Oven Elements
To extend the life of your new heating element and ensure even cooking, a little routine care goes a long way.
- Clean Spills Promptly: Sugary or acidic food spills that bake onto a hot element can cause localized hot spots and corrosion. Once the oven is cool, wipe up any major spills.
- Avoid Using the Oven for Storage: Leaving pots, pans, or foil on the oven floor can accidentally come into contact with the element when it heats, causing damage.
- Use the Self-Clean Cycle Sparingly: The extreme heat of the self-clean cycle puts tremendous stress on all oven components, including the heating elements. Use it only when necessary and always follow the manufacturer’s instructions.
- Don’t Slam the Oven Door: Repeated impact can jolt the element and its connections, potentially leading to loose wires or microfractures in the coil over time.
FAQ: Common Questions About Oven Element Replacement
How much does it cost to replace a bottom oven heating element?
The cost varies. The replacement part itself typically ranges from $20 to $60, depending on your oven model. If you hire a professional appliance technician, the total cost, including labor and the part, can range from $150 to $300. Doing it yourself saves the labor cost.
Can I replace an oven heating element myself?
Yes, for most people with basic DIY skills and a strong adherence to safety, replacing an oven element is a manageable task. The process is straightforward if you are comfortable disconnecting power and using basic hand tools. If you are ever unsure, consulting a professional is the safest choice.
How long should a bottom oven element last?
A quality oven heating element should last between 5 to 10 years with normal use. Frequent high-heat cooking, using the self-clean cycle often, and accidental physical damage can shorten its lifespan. If your element fails prematurely, it might be due to a voltage issue or another underlying electrical problem.
Why did my new oven element burn out quickly?
A new element failing quickly is a sign of another issue. Common causes include a short in the wiring harness, a faulty relay on the control board that sends continuous power, or an incorrect voltage supply to the appliance. Have a technician check the oven’s electrical system if this happens.
Is it safe to use the oven if only the broil element works?
Technically, you can use the broil element for some cooking, but it is not a substitute for the bake element. The heat distribution will be completely wrong, leading to burnt food on top and uncooked food underneath. It’s best to repair the bake element for proper and safe oven function.
Replacing your oven’s bottom heating element is a practical repair that restores your appliance’s core function. By methodically following the safety steps and installation guide, you can complete this project in under an hour. Remember to always double-check that the power is disconnected before starting, and test your work carefully before considering the job done. With your oven working correctly again, you can get back to your normal baking and roasting routine.