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How to Repair Common Oven Parts The oven is an appliance used in kitchens that is commonly used to cook food items. The heat from the oven sterilizes food items and kills the majority of microorganisms. An accurate oven thermometer is an essential for all bakers. Understanding how your oven functions will improve your baking cooking, roasting and cooking abilities. It will also eliminate those annoying hot spots which can cause damage to cakes, cookies and baked products. Thermostat The thermostat is a crucial component of your oven. It assists in ensuring that the temperature of food matches the temperature that you set on the control panel. It could be a problem as with any other sensor or switch that is electro-mechanical. The oven could overheat or underheat, or simply not maintain the temperature you have set. The oven thermostat is an extremely small strip of two different metals that are bonded together. When heated, the metals expand and bend at different rates. This creates an electrical circuit. When the metal in your thermostat reaches the temperature that you have set on the control panel it will shut off power to the heater. When the oven cools down, the bimetallic strip contracts, re-establishing the circuit and turning on the heating element. This process is repeated repeatedly to ensure a constant oven temperature. You'll need the oven disconnected and all screws removed to diagnose a thermostat problem. Set your multimeter to the Ohms setting and then test the thermostat. If the multimeter reads zero or close to it, then the thermostat is operating properly and doesn't require to be replaced. If the multimeter does not read anything at all, then the thermostat is not working properly and needs to be replaced. Cooker Spare Parts recommends that you replace the thermostat with a fresh one that is the same model as your old one. They are available on the internet or in the kitchen store, and can be bought at a reasonable cost. Bake Element Ovens are not complete without the bake element which provides heat to make your oven cook food. It's a small element that converts electricity into the high temperatures required for baking, roasting and broiling. Electric ovens and ranges typically contain heating elements, which can be exposed or hidden beneath the floor. In general, oven heating elements consist of high-resistance elements such as nickel-chromium. They work by converting electricity into heat via resistance. This heat is then radiated through the oven's interior to attain the temperature required to cook various types of food. When you turn on the oven the heating elements start to produce heat through the high-voltage current that flows across the metal's surface. When the electric current runs through it the element gets heated up. When the element reaches its temperature, it starts to glow red hot. The baked element is the main source of heat for the majority of oven functions. It's typically located in the bottom of the oven, and is used to clean the oven in many ovens with automatic cleaning. You may notice that the oven doesn't warm up as quickly or that your food hasn't fully cooked. To verify that you have a working oven baking element connect your multimeter to its red and black ports, and then place the metal probes against each other on one end of the element. The other end of the element against one terminal and place your hand on it. If the element feels warm, remove it and try testing it again. If not, remove it and try again. Broil Element The broil element is typically located in the top of your oven and can provide high heat like grills to brown or char food items. The broil setting in your oven is an excellent option for quickly grilling meat and vegetables, crisping up vegetables, warming lasagna or caramelizing the top of the casserole. The broiler heating element has a similarity to the bake element in that it converts electrical energy via resistance into heat. It is comprised of an inner core of wires made of metal wrapped in insulating expanded perlite product. The inner core is then wrapped in an outer layer of stainless steel to shield the wires from direct contact with the oven. The three-layer design helps reduce the temperature of the broil element, making it safer than older styles. You can use any heating element to bake or broiling in your oven. However, it is important to choose one that is in line with the wattage that your oven is rated for. Using a different wattage can 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 ratings and wattage of your oven . It is also advisable to check the resistance of your previous element and compare it to the power of the new broiler heating element. The greater the resistance, the greater the power that an oven element draws from. If your broiler's heating element is not working or functions at all, you must replace it immediately. It is crucial that your oven functions properly so that you can cook your most loved foods. If your oven isn't functioning in any way or only intermittently, the issue could lie with another part of your oven. Light Bulb and Assembly The light lets you keep an eye on your food while it cooks without opening the door and let heat escape. The light also informs you when your casserole is ready. It's not uncommon for the bulb to go out. It can be a hassle, but you can fix it yourself. Before you begin, be sure that the breaker hasn't tripped and that the three-prong connector remains intact. First, take out the old light bulb and then locate the new one. You may have to search online for a replacement that is compatible with the wattage and model of your oven. Some ovens utilize normal appliance bulbs that are 40 watts in power, while others need a halogen lamp up to 50 watts. Be aware that the oil in your hands can cause damage to the bulb, so you should use cotton gloves when handling it. Before putting the new bulb into place You must first remove it from its glass casing. You should do this slowly so that you don't break it. Then, you'll need to remove the air from the bulb and replace it with a mixture. This will extend the lifespan for the filament. If your bulb keeps being replaced, it may be a larger electrical issue that should be handled by a professional. Be sure to double check that you're using the correct bulb for your oven and look over your Use and Care Guide for additional troubleshooting suggestions. Be sure to unplug your oven and shut off the power before beginning any repairs. This will protect you from electrical shock. Vent Tube The vent tube is a vital oven component that allows for an airflow within the cavity. This allows the bake element to circulate heat throughout the oven, making sure that the temperature is distributed evenly. It also allows the vapors escape from the oven and smoke to be drained from the cooking surface. It is essential for efficient operation of any gas or electric oven. Oven vent tubes can become blocked or clogged due to a variety of reasons. Accidental spills and splatters during cooking can leave sticky residues on the oven vents, which attract dust and other particles that can eventually cause obstructions or blockages over time. Grease and oil can also become airborne and then settle on vents. Other environmental factors such as construction and kitchen renovations can introduce dust into the vents. This can lead to clogs. Depending on the oven model, the vent tube may include a bottle guide 20, spreader 46 and fill tip 12 that are integrally formed by the pipe 32. The bottle guide 20 can have a tapered edge that matches the tapered inside edge of the spreader, allowing the vent tubes to be placed easily into different sizes and shapes bottle necks. A clogged or blocked vent tube can cause an increase in pressure within the enclosing structure. This could result in a downdraft that pulls exhaust down the vent and backwards through the oven's burners, which can cause damage to the oven's components. Consult a professional if believe that your vent could be blocked or clogged. They will determine the cause and offer suggestions on how to clean or clean the vent.