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How to Repair Common Oven Parts Ovens are a kitchen appliance that is commonly used to cook food. The heat from the oven sterilizes food and kills the majority of microorganisms. An accurate oven thermometer is an essential for all bakers. Knowing how your oven functions will help improve your baking cooking, roasting and cooking abilities. It can also help you avoid those hot spots that can cause damage to cakes, cookies and baked items. Thermostat The thermostat is among the most important parts of your oven, helping ensure that the temperature of your food matches what you've set in your control panel. As with any electro mechanical switch or sensor, it can have issues that cause the oven to over or under heat, or not be able to keep the temperature you've set. The oven thermostat is essentially tiny strips of two different metals joined. When heated to a certain temperature, the two metals expand or bend at different rates. This creates an electrical circuit. When the thermostat's metal is at the temperature you've set on your control panel it turns off the heating element's power. As the oven cools the bimetallic strip expands in a way, reestablishing the circuit and activating the heating element. This process is repeated over and over to ensure that the temperature remains constant in your oven. It is necessary to disconnect the oven and all screws removed in order to determine a thermostat problem. Set your multimeter to the Ohms setting and then test the thermostat. If the multimeter displays zero or close to zero the thermostat is operating correctly and does not need to be changed. If the multimeter does not read anything, then the thermostat is not working properly and must be replaced. Cooker Spare Parts suggests that you replace your thermostat with a thermostat of the same type as the old one. The thermostats are available for purchase at a reasonable cost on the internet or in a kitchen products shop. Bake Element The bake element is essential to the operation of your oven. It produces the heat needed to cook food items. It's a simple element that converts electricity into high temperatures for baking, roasting and broiling. Heating elements are commonly found in electric ovens and ranges and are either uncovered or hidden under the floor of the oven. Generally, oven heating elements are made from high-resistance components like nickel-chromium alloy. They work by converting electricity into heat through resistance. This heat then radiates through the oven's interior to reach the temperature required to cook various types of food. When you turn on the oven, the heating elements begin to produce heat through the high-voltage current flowing across the surface of the metal. When electricity is flowing through it the element gets heated up. The element will turn red hot when it reaches the temperature you want. The baked element is the primary source of heat for most oven functions. It's usually located at the bottom of the oven, and is used to clean the oven in many automatic oven models. When it starts to burn out you may notice that your oven doesn't preheat as quickly or that your food isn't cooked through completely. To check for a working oven baking element connect your multimeter to its black and red ports, and then place the metal probes against each other on the opposite side of the element. Place the other end of the element against one terminal and place your hands on it. If the element feels warm, take it off it and test it again. If it's not, remove the element and start testing again. Broil Element The broil element, which is usually located on the top of your cavity provides high heat to cook or char foods. The broil setting of your oven is a great choice for quickly searing meat and vegetables, crisping up vegetables, warming lasagna, or caramelizing the top of the casserole. The broiler heating element is comparable to the bake element in that it converts electrical energy by resistance into heat. It is comprised of an inner core consisting of metal wires, wrapped in an insulating expanded product known as perlite. The core of the element is then covered with a stainless steel outer layer to shield the wires from direct contact with the oven. The three-layer structure helps lower the temperature of the broil element which makes it more durable and safer than older styles of elements. While you are able to use any baking or broiling heating element in your oven, it is important to select one that is compatible with the wattage that is recommended for your oven. hob and oven can harm your oven, or cause it to overheat. You can determine the power of your oven and the rating of the new heating element by looking at their current and voltage ratings on the control panel of your oven. Examine the resistance of your old element, then compare it to the wattage rating of the new element. The higher the resistance of an oven element, the more power it draws. If your broiler heating element is not working or functions at all, you should replace it right away. Your oven needs to function properly for you to be able to cook your favorite foods. If your oven doesn't function in any way, or just intermittently, the issue may be a problem with a different component. Light Bulb and Assembly The light allows you to monitor the food that is cooking, without opening the door and let heat escape. The light also lets you know when your casserole is ready. But it's not uncommon for the bulb to fail. This can be frustrating but it's an easy fix you can accomplish yourself. Make sure that the breaker isn't tripped and that the connector has three prongs. First, remove the light bulb that was in use and locate the new one. You may have to search the internet for a replacement bulb that is compatible with the wattage and model of oven you have. Some ovens use standard 40-watt appliance bulbs and others require a halogen bulb up to 50 watts. Be aware that the oil from your hands can cause damage to the halogen bulb, so it is recommended to use cotton gloves when handling it. Before you put the new bulb in place it is important to first take it out of its glass casing. It is important to take this step slowly to ensure that you don't break it. You'll then need to remove the air from the bulb and replace it with the mixture. This will provide a longer life for the filament. If your light bulb is always being replaced, it could be a wider electrical issue that should be dealt with by an expert. Verify that you're using the correct oven bulb and check your Use and Care Guide for more troubleshooting advice. And remember that it's always an excellent idea to unplug your oven and disconnect it from the outlet prior to you start any repair. This will help protect you from electric shock. Vent Tube The vent tube is an important oven part as it allows for a small amount of airflow to be created inside the cavity. This allows the bake element to circulate heat around the oven and ensures the temperature is evenly dispersed. It also allows the vapors to escape from the oven, and smoke to be drained from the cooking surface. It is necessary for the proper operation of any gas or electric oven. Oven vent tubes may become blocked due to a variety of factors. Accidental spills or splatters may leave sticky residues on oven vents. They can attract dust, debris and other contaminants that can cause clogs in the course of time. Grease and oil particles can become airborne and settle on the vents, too. Other environmental factors, like kitchen construction and renovations, could introduce dust or other pollutants into the vents, leading to clogs or blockages. Depending on the oven model the vent tube could comprise the bottle guide 20 and spreader 46, as well as fill tip 12 that are constructed with the pipe 32. The bottle guide 20 could have a tapered edge that matches the tapered inner edge of the spreader, allowing the vent tubes to be inserted easily into different sizes and shapes of bottle necks. A blocked vent tube may cause a reduction in pressure within the enclosure, which could cause an exhaust downdraft, which pulls the exhaust backwards and then down the vent, damaging the oven's components. Consult a professional if you believe that your vent could be blocked or clogged. They will identify the problem and provide suggestions on how to remove or clean the vent.