The gas stove is one of the essential utensils for cooking in the kitchen. Do you know the reason why the gas stove does not catch fire? Do you know how to fix a gas stove that won’t light?
The gas stove can’t light the fire maybe because there is no gas. If the gas stove can’t be on fire, first check whether there is still gas, if not, add gas.
It may also be due to whether the battery has electricity, and when it is found that it does not catch fire, check whether the battery has electricity. If not, just replace the ordinary AAA battery.
The following is an introduction to the causes and treatments of gas stoves failing to fire, and simple maintenance techniques for gas stoves.
The working principle of gas stove
When the gas stove is pressed on the knob and a small fire is ignited, the thermocouple is heated by its flame to generate thermoelectric potential.
The thermoelectric power is introduced into the solenoid coil through the wire, and a magnetic field is generated to make the solenoid valve close, the gas valve opens, and the combustion path opens to maintain its normal combustion.
Once it encounters strong wind or overflow, etc., the flame is extinguished, and the thermoelectric power of the thermocouple is very fast when it drops to zero, the coil loses power and the solenoid valve fails.
It is quickly reset under the action of the spring. The valve closes the gas passage and terminates the gas supply to ensure safety.
How the gas stove works
1. Ignition method of a gas stove
The ignition methods of gas stoves mainly include electronic pulse ignition and piezoelectric ceramic ignition.
Embedded stoves mostly use electronic pulse ignition, which will ignite at a certain position.
The ignition hit rate is high, generally 100%, but this method requires battery replacement.
The desktop stove mostly uses piezoelectric ceramic ignition, and its ignition success rate is greatly affected by the environmental humidity.
When ignition, you need to hold down the switch to ignite.
2. Flameout method
The safe use of gas stoves requires the installation of flameout protection devices.
At present, the commonly used flameout protection methods are mainly thermal, thermoelectric, and photoelectric.
The heat-sensitive type is also called the bimetallic type.
It uses the bimetallic plate to expand and bend under the action of temperature and uses the bimetallic plate as the sensor of the safety protection device.
Under the action of temperature, the metal with a large expansion coefficient will face the metal with a small expansion coefficient is bent on one side, and when it loses temperature, the metal that has been expanded and bent will slowly return to its original state.
The reason why the gas stove won’t catch fire
1. Run Out Of Gas
Generally, people have a good idea about this, but some people may be sloppy or busy at work, and often forget, so when you encounter a gas stove that does not ignite, you must first check whether there is still gas.
Solution: If the gas stove is out of gas, add gas.
2. Does the battery have electricity?
This is the most commonly encountered problem, and it is also a problem that people generally pay more attention to.
When you find that it can’t ignite, you must check whether the battery is charged.
Solution: If the gas stove battery is empty or exhausted, just replace the ordinary AA battery.
3. Poor circuit contact
This is a problem that is easy to overlook, but it is often encountered by many old users.
It is mainly to check whether the positive and negative poles of the battery box are rusted and whether the wiring is poorly connected.
Solution: If the gas stove circuit is in poor contact, remove the rust and connect the circuit accurately.
4. Overvoltage protection
Many gas stoves have an over-pressure protection function, and will not start once over-pressure.
Solution: If the gas stove is over-pressure protected, you must try a pressure reducing valve at this time.
5. The pipeline is blocked
This is a very common problem. Once the pipeline is blocked, it is necessary to check the gas outlet valve.
Generally speaking, if you can smell the gas but the gas stove cannot fire, it is likely to be a gas blockage.
Solution: The gas stove pipe is blocked, then the pipe must be unblocked or replaced.
6. The micro switch is damaged
At this time, there is a small place in the gas stove, but it is more difficult to repair than usual.
Generally speaking, it is not recommended that the owner repair it by himself.
Solution: The microswitch of the gas stove is damaged. This is a delicate and professional job. It is best to ask a professional to solve it.
7. The ignition needle is dirty
A kitchen is a place that is very easy to get dirty, especially easy to be contaminated with oil, etc.
If the gas stove is placed for too long, the ignition needle is easily stained by the oil.
Solution: At this time, you need to clean the grease on the ignition needle, and then try to ignite.
8. Improper position of ignition needle
The position of the ignition needle of the gas stove is improper.
To start a fire, the gas stove has certain requirements for the distance between the ignition needle and the fire cover.
Once the distance is too far, the gas stove will not ignite.
Solution: Generally speaking, the distance between the ignition needle and the fire cover is 4-6mm, and it should be aligned with the fire hole.
9. The gas stove has a high-voltage line and its connector
The gas stove has a high-voltage line and its connector. Once the high-voltage line is aging, it is easy to make the gas stove fail to catch fire.
Solution: At this time, only need to add a set of high-voltage protection, this should be paid more attention to in daily life.
Common problems of gas stove repair
1. Tempering of a gas stove
The fire hole is blocked. Because there are some impurities (such as sulfides) in the gas to varying degrees, dirt will be deposited in the fire hole of the fire cover.
Long-term use will make the fire hole smaller. If the gust or overflowing water is pressed, the flame will retreat, and then If tempering occurs, in order to avoid this situation, the fire hole should be cleaned in time after a period of use.
When the burner is not covered tightly or the air intake is large at the damper, a flashback is easy to occur.
Therefore, when tempering occurs, the correct handling routine is:
- Check whether the fire hole is blocked;
- Check whether the fire cover is in place;
- Adjust the air door.
2. The gas stove is off the fire
The cause of the off-fire is that the gas pressure is too high or the air intake is too large, which causes the flame to drift off the fire cover and burn.
Correct handling measures: first guide the user to correctly adjust the air volume at the damper to a small value.
Then overhaul the pressure reducing valve of the user’s home. If it is natural gas or artificial gas, it is a pipeline.
3. Black smoke or yellow flame
- The air door is fully closed, and the air door is opened appropriately
- There is a spider web in the ejector tube, remove the spider web
- Wrong selection of stove model, wrong use of artificial gas as a liquefied gas stove
- The ignition ring fire hole is blocked, clean the ignition ring fire hole
- There is a foreign body in the nozzle hole of the stove, clean the foreign body
4. Gas leak or gas smell
- If the hose is broken or not connected properly, replace with a new hose and fix it
- The seal at the valve joint is aging, replace the sealing ring
- If the valve fails for a long time, replace with a new valve
- The burner is not ignited, remove the fault and re-ignite
- Take off the flame or remove the flame, and clear off the flame (according to the previous method)
- The universal joint is leaking, repair or replace the universal joint
- Welding is not strong, there are blisters, replace or re-weld the tee
- The nozzle is not inserted into the ejector tube, reinstall the nozzle
- Cylinder, angle valve or pressure regulator, replace the cylinder or pressure regulator.
5. Long open flame
- The assembly is stuck and does not recover, replace the assembly
- The spool circlip is off, repair or replaces the total distance
- Poor assembly accuracy, re-assemble.
6. The flame is too small
- The stove model is wrong, look for the model and replace it
- The flameout protection device is not fully opened, repair the flameout device
- The three-energy management is not suitable, and the technical demonstration shall be carried out again
- The switch position is not in the fire state, adjust the switch position
- The hose is bent or flattened, adjust the hose
- If the pressure is insufficient, check whether the regulator is faulty for the liquefied gas. If the artificial gas (pipeline transportation) has a too-small flame at peak conditions, only one end can be used at this time. When the pressure is lower than the 50mm water column, you should negotiate with the gas company.
Cause analysis of common failures of gas stoves
1. Why can’t the gas stove ignite?
There are many reasons why a gas cooker can’t catch fire. Most impulse ignition cookers fail to catch fire due to a dead battery.
At this time, the user needs to replace the battery in the gas cooker.
If the ignition needle is not right, and the distance from the inner firework cover is too far, the cooker can not ignite.
The user can rotate the inner firework to cover appropriately and align the air outlet on the fire cover to the ignition needle.
The ignition needle of some users’ gas stoves has rusted, which affects the ignition.
Users can rub the ignition needle and the inner firework with a metal iron sheet to expose the metal surface to facilitate ignition.
In addition, improper ignition bracket and ignition nozzle, damaged Pulser, broken ignition needle, etc. will cause the gas cooker to fail to ignite.
In such situations, users need to find professional maintenance personnel for repairs.
2. Why does the flame go out soon?
The user must first check whether the battery in the gas cooker has electricity because the switch knob is not pressed in place.
In some users, the air door of the gas stove in the home is adjusted too large, and too much oxygen can cause this problem.
At this time, the air door should be adjusted appropriately.
For some stoves with flameout protection device, flameout protection needle (near the ignition needle) is too far away from the flame, so that the flameout protection device operates and cuts off the air source.
Users can adjust the inner firework cover to solve the problem.
The flameout protection needle in the gas cooker of individual users is covered by oil, the electromagnetic valve is damaged, the pulse is damaged, etc., which can also cause the flame to “unstuck”.
The user needs to find professional maintenance personnel to repair it.
3. Natural gas should be blue when it burns normally. Residents often have a “red fire” phenomenon with a red flame when using it, and sometimes it will blacken the pot. What is causing this? How should it be solved?
The flame appears “red”, which is mainly caused by the “carbon deposit” phenomenon caused by insufficient combustion of natural gas, so the pot will be blackened.
Gas users can manually adjust the air door of the gas stove to change the oxygen intake until the flame turns into a blue fire.
In addition, the fire cover of the gas stove is not placed properly, the fire cover is deformed, etc., which will also cause the phenomenon of “red fire” and smoked pot.
Users can adjust the position of the fire cover appropriately.
Obstruction of the fire outlet on the fire cover by oil stains is also the cause of the problem.
At this time, the user can use toothpicks, fine needles, etc. to pass the fire cover on the fire outlet.
4. What is the reason for the small flame
Most of these situations are caused by the obstruction of the fire hole and the nozzle of the fire cover by oil and impurities.
If the fire hole of the fire cover is blocked, the user can pass it through with a toothpick or a thin needle. The blocked nozzle needs to be cleaned or replaced by professional maintenance personnel.
In addition, if parts such as solenoid valves are contaminated by dirt, it will cause problems such as small flames and no fire.
At this time, professional maintenance personnel is required to clean and repair.
5. I sometimes smell a peculiar smell when cooking with natural gas. Why?
After the replacement of natural gas, many users report that they smell a peculiar smell when using natural gas.
This is mostly caused by insufficient natural gas combustion and exhaust gas overflow.
At this time, users need to properly adjust the stove damper to mix oxygen and natural gas to fully burn the natural gas.
In addition, the smell may be caused by natural gas leakage.
Natural gas users should pay attention to this, and check whether the clamps at the joints of the hose, the stove, and the pipeline are properly clamped, whether they are falling off or loose, and whether the hose is aging or broken.
When the hose becomes hard and sticky, the hose should be replaced in time, preferably once a year to prevent air leakage.
6. Why is there no gas when I turn on the switch?
There are several points that users can check and solve by themselves: whether the battery has electricity, whether there is a problem with the gas pipeline in the community, which causes the gas to stop, whether the gas pipe is bent or flattened, whether the filter is gambling.
If none of the above conditions, then the solenoid valve is broken, just find a professional to replace the solenoid valve.