How to Test and Replace the Resistance of an Oven

Jul 25, 2023, 18:53pm

If after a certain period, your oven begins to no longer heat properly, one of the resistors may be faulty. This is the heating element of your oven.

It is advisable to change your resistance if you notice the following problems:

  • Your oven is no longer working properly.
  • It does not heat up or not enough.
  • One of the resistances of the oven no longer heats.
  • Your oven is tripping.

This page explains how to test and replace the 3 resistors found on most ovens: the circular, bottom and top resistors.

There are three types of resistance in an oven, each corresponding to a cooking mode.

  • The circular resistance, located at the bottom of the oven.
  • The floor heating element, located at the bottom of the oven.
  • The vault resistance, located on the top of the oven.

The heating element or resistance of an oven is the component responsible for producing heat. If your oven isn’t heating up as it should, a faulty heating element might be the cause. This guide will show you how to test and, if necessary, replace this crucial part.

Disclaimer: Working with electrical appliances can be dangerous. Always disconnect the oven from the power source before starting. If you’re not comfortable working with electronics or if your oven’s warranty is still valid, consider hiring a professional.

How to Test and Replace the Resistance of an Oven

Tools You Might Need

  1. Multimeter
  2. Replacement heating element (ensure it’s compatible with your oven model)
  3. Screwdriver

Step-by-Step Guide

Step 1: Disconnect the Oven

For safety purposes, always ensure the oven is unplugged or disconnected from power before you begin.

Step 2: Locate the Heating Element

The heating element is typically located at the back or bottom of the oven’s interior. For some models, you may need to remove a panel to access it.

Step 3: Test the Heating Element

Set your multimeter to measure resistance (ohms). Remove the wires connected to the heating element (make note of their positioning for reassembly), then place the multimeter’s probes on each of the element’s terminals. A properly functioning heating element typically shows a reading between 20 and 40 ohms. If your reading significantly deviates from this range or shows infinite resistance (indicating a break in the circuit), the element needs replacing.

Step 4: Remove the Faulty Heating Element

To remove the faulty heating element, you will need to unscrew it from the oven’s interior. Be careful when handling the element as it can be sharp and could cause injury.

Step 5: Install the New Heating Element

Align the new heating element with the screw holes and secure it in place. Reconnect the wires to their respective terminals. Be sure all connections are firm and secure.

How to Test and Replace the Resistance of an Oven

Step 6: Reassemble the Oven

If you had to remove any panels to access the heating element, replace them and ensure they are securely fastened.

Step 7: Test the Oven

Reconnect the oven to the power source and set it to a bake function. Allow it a few minutes to heat up. The oven should now heat properly. If it doesn’t, or if you notice any unusual noises or operation, disconnect the oven and consult with a professional.

In conclusion, while testing and replacing an oven’s heating element can be done as a DIY project, it does require some familiarity with electrical systems and components. If you’re not comfortable with any step in the process, it’s best to hire a professional to avoid any potential risks or damage to the oven. Safety should always be your top priority.