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How to Repair Common Oven Parts The oven is an appliance in the kitchen that is used to cook food items. The heat generated by the oven sterilizes food items and kills the majority of micro-organisms in them. A precise oven thermometer is an essential for bakers of all kinds. Knowing how your oven functions will improve your baking, roasting and cooking skills. It will also eliminate those annoying hot spots which can cause damage to cakes, cookies and baked goods. Thermostat The thermostat is one of the most crucial components of your oven, helping to ensure that the temperature of your food is exactly the temperature you've set on the control panel. It can be problematic, just like any other switch or sensor that is electro-mechanical. The oven can overheat or underheat, or simply not keep the temperature you have set. The oven thermostat is basically a small strip made of two different metals joined. When heated, the different metals expand and bend at different rates, forming or breaking an electrical circuit. When the metal in the thermostat attains the temperature you've set on your control panel it shuts off power to the heating element. As the oven cools down the bimetallic strip contract, re-establishing the circuit and turning on the heating element. This cycle is repeated continuously to ensure a constant oven temperature. It is necessary to disconnect the oven and all screws removed to identify the problem with the thermostat. Set your multimeter to the Ohms setting, and then test the thermostat. If the multimeter reads zero or close to zero the thermostat is operating properly and doesn't need to be changed. If the multimeter doesn't show anything, the thermostat is faulty. It is time to get it replaced. Cooker Spare Parts suggests that you replace your thermostat with a similar model as the one you have. The thermostats are available for purchase at a reasonable price on the internet or in the kitchen store. Bake Element The bake element is vital to the operation of your oven. It generates heat that allows it to cook food. It's a small component that transforms electricity into the high temperatures required to bake, roast, and broiling. Electric ovens and ranges usually contain heating elements, which are either visible or hidden beneath the floor. In general, oven heating elements consist of high-resistance elements such as nickel-chromium. They work by converting electrical energy into heat through the process of resistance which then radiates through the oven's interior to raise the temperature to the desired degree to cook various types of foods. When you switch on your oven , the heating element begins to produce heat through the high-voltage electricity moving across its metal surface. The element is a ribbon or coil (straight or corrugated) of wire. When the electric current passes through it, it begins to increase in temperature. When the element reaches the temperature it is intended to, it starts to be lit up in red hot. The baked element is the primary source of heat used in most oven functions. It's usually found at the bottom of the oven and is also used to perform the self-cleaning function in many ovens with automatic cleaning. You might observe that the oven doesn't heat up as quickly, or that your food hasn't been fully cooked. Plug your multimeter in to its red and black ports. Then, press the metal probes on one end of the element to each other. Place the other end of the element on one terminal and place your hand on it. If the element feels warm, remove it and try testing it again. If it's not, take off the element and test again. Broil Element The broil element, usually found at the top of your cavity allows high-temperature heat to cook or char the food. The oven's broil setting can be an excellent way to quickly sear meat or crisp vegetables, to heat up lasagna, or caramelize the topping of a casserole. The broiler heating element is similar to the bake element in that it converts electrical energy by resistance into heat. It is comprised of an inner core made up of metal wires, wrapped in an insulating expanded product called perlite. The inner core of the element is covered with a stainless steel outer layer to protect the wires against direct contact with the oven. The three-layer design helps to reduce the temperature of the broil element, making it more secure than older styles. You can use any heating element you want to use for baking or broiling in your oven. But, you must choose one that is in line with the wattage that your oven is rated for. A different wattage could cause damage to your oven or cause it to overheat. The current and voltage ratings of the new heating elements are available on the control panel of your oven. This allows you to determine the wattage and rating of your oven. Examine the resistance of the old element, then compare it to the wattage rating of the new element. The higher the resistance, the greater power an oven element uses. Replace the element in your broiler immediately in the event that it isn't working or is acting up. It's important for your oven to function correctly to be able to cook your most loved food items. If your oven does not operate at all, or only intermittently, the issue may be in a different part. Light Bulb and Assembly The light lets you keep an eye on the food that is cooking without opening the door and let heat escape. The light will also let you know when the casserole has been cooked. But it's not uncommon for the light bulb to go out. This can be frustrating, but it's a relatively simple fix that you can do yourself. Before you start, make sure that the breaker hasn't tripped and that the three-prong connector is in good condition. Take out the old bulb and then locate the new one. You may have to look online for a replacement bulb that matches the wattage and type of your oven. Some use standard 40-watt appliance bulbs and others require a halogen bulb up to 50 watts. You should consider using cotton gloves to shield the halogen bulbs from damage caused by oil. Before you place the new bulb into place You must first remove it from its glass casing. It is important to do this slowly to avoid breaking it. Then, you'll have to evacuate the air inside the bulb and fill it up with gas mixture. This will provide a longer life for the filament. If your bulb is constantly being replaced, it could be a wider electrical issue that should be addressed by a professional. Make sure you're using the correct oven bulb and consult your Use and Care Guide for more troubleshooting advice. And remember that it's always an excellent idea to unplug your oven and disconnect the power from the outlet before you start any repair. This will protect your from electrical shock. Vent Tube The vent tube is an essential oven component because it allows for a tiny amount of airflow within the cavity. This allows the bake element to circulate heat around the oven and ensures that 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 essential for proper operation of any gas or electric oven. Oven vent tubes may become blocked by various reasons. Accidental spills and splatters during cooking can leave sticky residues on the oven vents, which could attract dust and other debris that could eventually cause blockages or clogs over time. Grease and oil may also become airborne, and settle around vents. Other environmental factors like construction and kitchen renovations can cause dust to enter the vents. This can lead to clogs. Depending on the oven model, the vent tube may comprise the bottle guide 20 and spreader 46, as well as fill tip 12 that are formed by the pipe 32. The bottle guide 20 can be fitted with a tapered outer edge that matches the tapered inner edge of the spreader to allow the vent tubes to be placed effortlessly into various sizes and shapes of bottle necks. A blocked or clogged vent tube could cause a loss of pressure within the enclosing structure. This can result in a downdraft that pushes exhaust down the vent and backwards towards the oven's burners, which can cause damage to oven components. If you think that your vent tube is clogged or blocked, contact a professional for help. They will identify the problem and provide suggestions on how to clear or clean the vent.