Since even the most useful home appliances cannot guarantee everlasting unit operation, a wall oven may have a failure as well. Unfortunately, it results in frequent breakdowns.If you ever face it, the best thing to do is to put aside confusion and try finding the cause of a fault. Let’s discuss the peculiar features of electric and gas ovens in detail and consider all the possible breakdown reasons and effective troubleshooting methods for these “kitchen helpers”.External and internal causes of wall oven faultsIf you cannot turn on your wall oven, the possible causes can be divided into external and internal ones. The former includes power outage in the wall oven installation area, as well as a faulty socket, cables, and plugs connecting the oven to the power source. If you can’t find any fault at this stage, you can start looking for internal causes.When you make sure the oven is powered on but not heating, the issue may lie in one of the following elements (internal causes):

• Faulty thermal sensor (typical of Samsung ovens) that is responsible for regulating the temperature conditions inside the oven;
• Broil heating element must become red-hot upon heating. If this is not the case and you notice cracks or other coating defects on the element, it is likely to be the issue;
• The same issue may also happen with the bake heating element. The reason is overloading that results in a burnout. If the element is not glowing red upon heating, it also indicates a fault;
• One of the control relay boards can burn out in case of a voltage surge. As a result, Gorenje and Whirlpool wall ovens stop working at all;
• If a Whirlpool oven is overheating, you should pay attention to the bimetallic gauge. A blown-out fuse results in higher temperatures inside the oven. You can find out the fault with a multimeter;
• Advanced oven models like Samsung, Bosch, and Electrolux are regulated with the control board. So if it burns out, the oven will stop working.

Another reason for a sudden loss of heat in the oven with the power on is missing or incorrect timer settings. Some oven models like Bosch just can’t work without it. It means the timer is not just a useful option for housewives, but also a prerequisite for normal oven operation. That is why it is crucial to check its settings before turning the power off.In Electrolux models, the oven may stop working due to a faulty cooling fan. It is likely blocked with dust and fat deposits. Just take off and clean it, grease the parts, and put it back.You should also make sure the oven glass is in good condition without any cracks or chipping. Otherwise, it will let the heat out and may also affect the operation of the oven.5 Common Faults of a Gas Oven

1. The burner is not turning on, and the oven is not working. It means the parts of the gas control system are worn out. They stop the gas supply in case of a leak. Since the constant heating is devastating for the thermocouple, it gets damaged over time. That is why the wall oven turns off right after you release the control knob. Don’t even try to repair or fix it. It’s better to replace it with a new similar one.
2. No spark from the electric igniter. It is supplied with a 125V power line. The spark is produced in the spark module. After 5-6 years, there may be a closure leading to a spark igniting two burners at a time. An electric igniter can also burn out completely and produce no spark at all. In this case, the unit shall be replaced.
3. A wall oven is not heating up. The temperature is regulated with a mechanical thermostat. The thermostat with liquid filling is installed inside the oven. The liquid expands upon heating and pushes the valve. This process allows to stop the gas supply: the gas supply reduces with higher temperatures. If the burner flame is weak and not raising with the door open, the only solution ‑is to replace the thermostat.
4. The gas valve is not turning. Many of us know that the gas equipment should go through maintenance regularly. It includes greasing and cleaning the valves. If you don’t do it on time, the rotary mechanism will completely seize up from drying out. This can also happen due to oven thermostat fault or worn-out rotary gears. In both cases, the solution includes inspecting the gas valve, determining the fault, and greasing the valve with graphite paste.
5. The oven burner is not igniting. This fault is likely to emerge if the oven has been serving you with dedication and commitment for many years. There are a few reasons for it: a severely worn-out spark module, insulation fault of a spark electrode cable, and breakup of a ceramic ignition plug. To determine the fault, turn off the kitchen lights at night, switch on the electric igniter, and watch the spark.

5 Common Faults of Electric Wall Oven

1. The oven is not heating, and the heating element is not glowing. In this case, we recommend reading the operation manual thoroughly. Try switching all the maintenance modes. If the problem persists, you should call our company for repair. There are many possible reasons starting from a faulty socket and loss of line voltage to a complete oven failure.
2. The temperature mode and level are set, but the oven is not heating. If you use another device to make sure the socket is serviceable, and the cable is damaged, you should replace it with a new one.
3. The oven is overheating and burns the food. It means the thermostat is faulty. This will lead to the oven overheating or no heat at all.
4. The food is not baking well and remains raw, while the cooking time is greatly increased. The issue is with the bake or broil heating element. When replaced, the oven will continue working normally.
5. The wall oven is not working. It indicates a failure of the electronic module. You should disassemble the oven, replace the module with a new one, and flash the new firmware. Since the manufacturers do not share the electrical diagrams with service centers, there is no way to solder the control board circuit.

Self-troubleshooting of different oven faultsBefore starting the troubleshooting, check out the detailed electric diagram of the oven and clarify the disassembly sequence. All the documents are usually supplied with the oven operation manual.While the diagrams of all models are almost identical, you can make a corresponding request and find all the relevant information on the internet If the documents are not available.First of all, remove the upper part of the oven with burners (the cooktop). Usually, it is fastened to the oven with a few bolts, so it should be easy to do it. Unscrew the fasteners and leave the panel aside or lean it on the wall if you cannot detach it completely. This will provide for better working conditions.Sometimes an oven can be installed in the corner or between the cabinets to ensure a better ergonomic position of furniture and appliances. You can move it to the kitchen center to avoid any troubles in repair.Since some sensors and elements are installed deep inside the oven, gear up with a flashlight to light up the working area.Apart from the light, you will need the following tools: screwdriver, fine sandpaper, voltmeter, spirit solution, cloth.Attention! To avoid confusing the cooktop and oven cables, mark them in advance with colored paper stickers or insulation tape.Inside the oven, you will find a foil-coated casing protected with a layer of thermal insulation along with the heating elements and metal chamber. It is certainly not the complete list of the inner oven components. There are various other units, elements, regulators, and sensors that are also prone to failures.For example, the reason for the grill feature not working may lie in the faulty closed door detector instead of the damaged heating element. Nowadays many wall oven models have this safety feature to stop grilling if the door is open.

1. Power controller

This device is used to maintain the selected temperature mode. This element works together with the thermostat (or temperature controller). The power controller is activated by closing the required contacts used to increase or reduce power supplied to the electrical heating elements. The temperature controller is used to protect the oven from overheating. In case of failure, the oven will overheat or stop working at all. While a faulty thermostat cannot be repaired, it must be replaced.The common reasons for a power controller fault are listed below:

• Deformed or damaged bimetallic plates. In this case, it’s really hard to do the repair, so you should better buy the new part;
• The copper contacts are oxidated or contaminated. You can use a spirit-based liquid to clean these contacts after disassembling the unit. Any visible carbon deposits can be easily removed with fine sandpaper.

Pro Tip: The maintenance cleaning is usually enough to ensure the operation of this unit. If the problem persists after cleaning and removing the oxide film, the only solution is to order a new part.

2. Control unit

When you see an error code on the display, you will immediately understand that something is not right. The internal self-diagnosis of the control unit is carried out by the device. Look for the meaning of the error codes in the operation manual or send a request to the oven manufacturer.In case of a serious control unit fault or no reaction to your operations, the only solution is to replace the unit. It’s too costly or even dangerous to repair this part.You can order the new part in an online store or on the official website of the oven manufacturer (however, not every company sells oven spare parts). The only thing you need is to find a matching number in the catalog. You can quite easily replace the unit by yourself. Just disconnect the faulty part from the power source and oven and put a new one in its place.Since the unit has a complicated design, the chances of repairing it are extremely low and require much effort, and that is why even experienced electricians usually suggest replacing the faulty unit instead of repairing it.

3. Cable issues

What to start with? First of all, check the continuity of all circuit cables and contacts. To do this, you can use a special device called a voltmeter. Follow these steps to complete the check:

• Check the wires coming from the main input terminal to the control unit, heat selector, or power controller;
• After that, inspect the wires coming from the controller or switch to the main heating elements;
• In the end, check every fuse installed in the circuit. You can use the operation manual to find out their exact positions.

Important! Before checks, inspect the wires visually for burnout insulation areas. You may also notice wires with a damaged external jacket. Such cables must be completely replaced without any doubts.

4. Heat selector

The heat selector is used to turn the heating elements on and off. The heating elements can work together or separately. Apart from the heating elements, this selector is also used to turn on the grill and convection modes.The inner design of this unit is similar to the power controller, so it may have the same issues in operation. First of all, carry out the initial diagnosis. The main task is to rule out the failure of heating elements. This can be done by checking the continuity of the cable coming from the heat selector to every heating element.After that, clean the mechanical parts of the unit and check the copper contacts. If the problem persists, go ahead and order the new selector.How much does it cost to call a specialist to fix an oven?Fixing an oven wiring problem is not an easy task for everyone. Most people prefer calling a specialist. The cost of home appliance repair depends on how complicated the fault is.You should always keep in mind the complexity of the issue. For example, in case of a main control unit failure, it makes more sense to replace the oven instead of repairing the old one as the price for replacing this unit can be up to 60% of the new oven price.You can easily check the condition of your oven by yourself. It’s quite simple to do. The most important is to follow the disassembly sequence. Be careful when removing the cooktop and avoid mixing up the wires. As we said before, you can mark the wire connection sequence with colored stickers. If you still doubt your skills, you should better call our company.