The oven is a special technique. The hostess chooses the device “for herself” for a long time and is glad when all the declared parameters meet the expectations. But high-quality performance does not save you from troubles: the devices have their weak points, breakdowns occasionally occur. A full-fledged self-repair of gas ovens is unacceptable: the warranty is lost, and there is a danger to life and health.
At the same time, there is a list of popular faults that block the operation of the burners, but are not associated with the supply of gas to them or larger problems. They can be easily removed by hand. Consider such moments when, with a minimum set of tools, you can return the device to working condition. And in what cases you will still need the help of a specialist from the gas service.
The content of the article:
- The general principle of the oven
-
5 main oven malfunctions
- Breakdown # 1 - blockage of gas supply by thermocouple
- Breakage # 2 - Calibration of the safety thermostat
- Breakage # 3 - door does not fit well
- Breakage # 4 - clogged or faulty burner
- Breakage # 5 - breakage of the heating coil
- Breakdown Prevention Tips
- Conclusions and useful video on the topic
The general principle of the oven
It is impossible to diagnose a breakdown without familiarizing yourself with the principle of the oven.
In older models, gas was supplied to the burner from two pipes placed along the side walls. Such ovens were set on fire by hand - a tube from a newspaper. The safety of their work was ensured by free gaps on the sides of the unit and an open bottom opening.
Modern models are equipped with profiled round burners and gas control systems. Some devices have electric ignition, grill, convection option, which assumes the presence of a fan, a heating element.
The most capricious part of the oven design is ignition.
When we turn the knob or press the auto-ignition button, a spark goes to the burner. A thermocouple is located next to the ignition system. She is also included in the gas control
The main malfunctions of the oven are determined by the following symptoms:
- the gas stopped burning;
- the ignition does not work immediately;
- the flame differs from the usual one by uneven color or burning;
- during operation, the device makes noise, an extraneous smell is heard.
Finding something similar, turn off the gas supply. Then we inspect the device for the presence of foreign objects: pieces of food and other debris. If necessary, we carry out cleaning.
Healthy check operability and the position of all valves. Periodically, they need cleaning and maintenance in the form of lubricants. We also pay attention to the state of the bore. When it breaks down, the part is easier to replace than to repair.
Problems in the operation of touch panels are associated with breakdowns of individual elements or the entire unit. This is due to the ingress of moisture into the mechanism, rupture of the connecting cable. Part replacement required
If everything is in order with the cleanliness and state of the control unit, we proceed to checking individual structural elements.
5 main oven malfunctions
When the fire goes out thermocouple blocks the gas supply. To warm up and activate the device, hold down the ignition button for a few seconds. Then we set the temperature, warm up the cabinet and start cooking.
If the oven in the gas stove does not work for no apparent reason, this is a result of a breakdown in the ignition, gas valve or other parts of the structure. Let's deal with the problems in order.
Breakdown # 1 - blockage of gas supply by thermocouple
Mechanism gas control functions due to the generation of an energy charge by the thermocouple, which is distributed along the wire to the solenoid valve. The latter expands under the influence of an electromagnetic field.
The thermocouple may not have enough heat due to misalignment or contamination of the device tip. As a result, it does not heat up, the valve does not open, the flame goes out. Or the structure is worn out due to natural factors
In most cases, a complete replacement of the element is needed, which is only done gas service specialists.
It is only recommended to try to clean the head of the handpiece with sandpaper on your own. This will help in the case when the flame burns when the button is pressed and goes out when it is released.
Breakage # 2 - Calibration of the safety thermostat
This regulator controls temperature regime in the closet. When necessary, it switches off or on the flow.
The thermostat is controlled by a knob with values printed on it. The simplicity of the device does not prevent damage. If there are any comments about burnt or raw food, the problem is with this item.
To check if the thermostat is working properly, set the scale to 150 degrees. We place a mechanical thermometer in a metal case inside the cabinet. It is inexpensive, but it helps to determine the malfunction.
Then we turn on the oven and after 25 minutes we compare the indicators - whether the cabinet has warmed up to 150 degrees. If the discrepancies are limited within 5 degrees, the element is in good order and the cause of the breakdown is not in it.
If the temperature difference is more than 5 degrees, the thermostat needs to be replaced, for which:
- We buy a new part for the desired oven model.
- Remove the adjusting knob from the instrument control panel.
- We loosen the element fastening bolts.
- We photograph the wiring diagram and turn it off.
- We take out the thermostat and replace it with a new one.
We repeat the algorithm in reverse order: we connect the wiring, fix the bolts, insert the handle. Do not forget to test the new part in the same way as we checked the old one.
The described actions refer to mechanical and electric thermostats. But figure out how to fix electronic a high-tech sensor in a gas oven, only a specialist will help.
Breakage # 3 - door does not fit well
There are two cases - loose and snug fit oven doors. In the first situation, heat is lost, the cooking process is delayed indefinitely.
The door is loose due to a worn gasket or loose fittings. The latter are simply tightened using a suitable screwdriver
If the problem is with the seal, it must be replaced. To do this, we remove the door from the hinges, remove the old gasket, clean the gutter with a solution of laundry soap or detergent and install a new seal.
The tight fit of the door sometimes leads to interruptions with ignition. The lack of oxygen makes the combustion process difficult and the flame goes out. Technological clearances prevent this.
Breakage # 4 - clogged or faulty burner
If the burner ignites, look at the color of the flame. Blue indicates a normal combustion process. A red, orange tint signals trouble. We recommend that you familiarize yourself with the factors affecting flame color.
Incorrect operation of the burner leads to the accumulation of soot and negative consequences for the health of users. The carbon layer can also provoke a fire
A change in the color of the flame is an indicator of insufficient air quantity in a gas combustion cabinet or evidence of incomplete fuel combustion. The help of a specialist is needed here.
Another point is the clogging of the nozzles. Remnants of food, detergents periodically get into them, fuel combustion products accumulate.
The nozzles are cleaned with toothpicks or wooden sticks. Metal tools cannot be used.
Breakage # 5 - breakage of the heating coil
Ovens with convection supplemented with electric heaters. Sometimes the breakdown is associated with them.
If the coil does not work, it needs to be replaced. A new part is bought at an electronics store.
To replace:
- remove the back wall of the case, open the core of the device;
- we release the element from the clamps;
- remove the ceramic insulator - porcelain beads, which are strung on a new heater;
- we insert a new part into the grooves and assemble the oven.
It is recommended to take pictures of each step to avoid mistakes during reassembly.
Breakdown Prevention Tips
To understand why your gas oven broke down, you need to carefully and carefully treat the cleanliness of the surfaces of the device and its elements.
Follow the manufacturer's recommendations, adhere to temperature conditions when cooking, baking.
Sometimes the oven does not work for obvious reasons that have simply been forgotten. Examples: the gas valve is closed, the lights are turned off, the house is undergoing renovations
All users of gas equipment after correct installation and oven connection must comply with the safety rules for the operation of gas-using devices.
They are as follows:
- Before turning on the stove for the first time, be sure to go through the instructions and read the instructions.
- Do not leave the burning oven unattended.
- When the fire goes out, you must first turn off the burner tap, and then try to ignite the burner.
- The oven must be kept clean. Perform a thorough cleaning at least once a week. Manufacturers recommend doing this after each use.
- Important and regular service maintenance gas oven and stove.
- It is unacceptable to make any changes to the device design on your own.
If there is a leak, turn off the supply valve and call the emergency service. It is prohibited to use the devices before the arrival of specialists.
We wrote in more detail about methods for detecting gas leaks in this material.
Conclusions and useful video on the topic
Gas control device: principle of operation, shutdown of the supply.
Oven door repair.
How to remove and clean the valves.
The gas is highly flammable and explosive. Hundreds of dangerous situations are covered in the media, many of which are related to self-repair of equipment. It's one thing to remove dirt, remove and clean the handles, adjust the door. Quite another is the replacement of the thermocouple, the control unit.
If you are not sure of your experience or do not have the right tools at hand, entrust the solution of problems to specialists. They will quickly determine why the oven does not turn on in the gas stove or the oven does not work well, and fix the malfunctions..
Have you faced breakdowns of your favorite oven or are you professionally repairing ovens? Share your experience and professional secrets with other users - your recommendations will be of interest to many beginners. Write your comments and advice, add original photos of the repair, participate in discussions - the feedback form is located below.
