What is the reason why the air conditioner suddenly starts automatically again after it is turned of

1. The setting of the air conditioner.

It is recommended to check whether the air conditioner is set to switch on and off at a regular time, if the automatic switch on and off is set, the air conditioner will automatically restart after it is turned off, and if it is set, you can cancel the automatic power on/off.

2. Remote control for air conditioner.

Malfunction. It is recommended to check if the remote control of the air conditioner is out of order. You can turn on the mobile phone recording function, make the remote control point at the mobile phone camera, press any button of the remote control, and you will see that the transmitter of the remote control will emit infrared rays on the screen of the mobile phone.

That is, it flashes and flashes, which proves that the remote control is good. If the remote control fails, change the battery or change the remote control, if it still can't solve this problem, you can let a professional person come to repair it.

3. The air conditioning circuit board is damp.

Check whether the air conditioning circuit board is damp, if it is wet, it will make the air conditioner fail, so that the air conditioner will fail, obviously the air conditioner has been turned off but it will still automatically turn on, to solve this problem, the circuit board needs to be replaced, when in use, especially in the case of humid weather, the air conditioning circuit board should be cleaned, and the air conditioner should be used frequently, and the air conditioner will also fail if it is placed for too long and not used.

First of all, we need to check whether the air conditioner is set to turn on and off at a regular time, if it is set, it is normal for the air conditioner to turn on automatically!

Check whether there are household appliances near the air conditioner and whether there is electromagnetic interference.

In this case, you need to turn off the electrical appliances near the air conditioner, and then whether the air conditioner will still turn on automatically!

Check whether the remote control of the air conditioner is out of order, and check this aspect is to take out the battery of the remote control, or put the remote control as far away as possible from the air conditioner!

Check the air conditioner circuit board for moisture.

Inspect the parts on the air conditioner circuit board for damage! The above 5 points may lead to the automatic start of the air conditioner, 80% of the reasons are due to the damage or aging of the air conditioning circuit board and the automatic start of the air conditioner, in this case, you need to find a professional maintenance air conditioning department to repair, it is recommended that you do not disassemble it casually, in order to avoid damage to more accessories and the risk of electric shock!

It is the high-voltage fault of the air conditioner and the protection shutdown, the reason may be that the weather is too hot, the outdoor unit radiator is dirty and the heat can not be dissipated, unplug the power supply and wait a few minutes to turn on the machine is because of this reason, the pressure returns to balance after the shutdown, and the machine cools down, so it can be started.

After the air conditioner is turned off, it suddenly starts up automatically again1, check whether the remote control switch button is pressed to reset, or you can also take the remote control to another room to see if the other air conditioner is still not the same as the fault.

2. Check whether the power supply is in and out of time, and whether the air conditioner plug and socket are in good contact.

3. Check whether the power terminal in the machine is connected.

4. The control board is faulty.

The air conditioner you said suddenly started automatically again after it was turned off. That's probably how long you set it to automatically turn on later.

As a science student, from a science and engineering point of view, you should accidentally touch the remote control of the air conditioner twice.

The air conditioner will automatically turn on for a while and then automatically shut down for the following reasons:

1. There is poor contact with the plug of the power supply socket.

If the plug is too loose, you can break the two pins of the plug a little bit to make it stuck in the socket jack tighter, which can solve the poor contact. If this is still a bit of a bad contact, then you may want to consider replacing the socket jack or replacing the power cord plug.

Second, the power supply voltage is unstable.

This situation generally occurs during the peak of electricity consumption in summer, because the grid voltage is unstable, or there are too many high-power loads of electricity at home at the same time, which will affect the stability of the voltage. If the voltage does not meet the starting power requirements of the air conditioner, the air conditioner will automatically shut down. At this time, you need to use a multimeter to measure the voltage.

When the voltage is unstable, you can only suspend the use of other high-power loads, or simply use the air conditioner at peak hours.

3. The air conditioner has a protective shutdown.

Under normal circumstances, there can be no large accumulation within 3 meters of the air outlet of the air conditioner, otherwise it will affect the exhaust of the air conditioner. Debris accumulates at the air outlet of the outdoor unit, which will cause poor ventilation.

Fourth, the starting capacitor of the outdoor cooling fan is faulty.

When the fan does not rotate, the temperature is too high and the protection stops. It can be observed by the naked eye, and the fan does not rotate after turning on. This situation can be solved by replacing the fan cranking capacitor and allowing the fan to work normally.

Fifth, the indoor thermostat is damaged or the wiring has poor contact.

The above mentioned are all external reasons, if the inspection is fine, you need to check the thermostat and wiring of the air conditioner itself. Generally, some air conditioners that have been used for a long time are prone to poor contact due to aging wiring. If the thermostat is damaged, it is even more troublesome, and the case needs to be disassembled for testing and replacing the thermostat.

The automatic start of the air conditioner may be because the set temperature is close to the room temperature, and the machine is shut down at the set temperature. The voltage is abnormal and unstable. Compressor overcurrent protection

The temperature of the coil in the room is too high, causing a protective shutdown. When the indoor temperature is 26 degrees Celsius and the outdoor temperature is above 20 degrees, the air conditioner cannot heat normally, which is easy to cause protection.

The failure of the indoor fan causes no blowing and protects the shutdown. If the outdoor fan fails, causing serious frosting, defrost is carried out, and the indoor air prevention function is entered. When the indoor unit of the air conditioner cannot work normally, the microprocessor part in the control circuit of the indoor unit should be checked, focusing on the power supply circuit, reset circuit, clock crystal oscillator and eepr0m of the microprocessor.

Maintenance during start-up:

After the air conditioner is turned on, the maintenance times during the air conditioner start-up process are determined by many factors such as environmental conditions, climatic conditions, number of hours of start-up, surrounding dust, air cleanliness, and whether the room is clean.

The environmental conditions are not good, the weather is hot, the air conditioner is outdated, the air conditioner is turned on for a long time, and the number of maintenance during the air conditioner start-up process increases, usually once every month and a half.

If the environmental conditions are good, the air conditioner is relatively new, there is less dust in the air, the air conditioner is turned on reasonably, and the electric fan is used alternately, the maintenance cycle can be appropriately extended, from the start of the air conditioner to the shutdown of the air conditioner for maintenance 1-2 times. Maintenance should be careful and careful, leaving no dead ends. Comply with the specifications, improve the refrigeration speed and refrigeration effect, and achieve energy saving, freshness and comfort.

If the air conditioner turns on automatically, these reasons are automatically turned off, and this should be a problem with the motherboard in it.

It is likely that the voltage in your home is unstable, and the instantaneous voltage fluctuation has caused the inductive electronic switch of the air conditioner to operate. It is recommended to use a multimeter to test whether the voltage is stable. If it is not a voltage problem, then it may be a circuit problem on the air conditioner control board, or the filter capacitor may be broken, making it automatically turn on.

Generally, the computer of the air conditioner is confused for a while. In the words of the industry, it is an endless loop of procedures.

Is it set to automatically turn on and off on the remote control?

It may be the cause of high pressure and overheating: 1. Too much refrigerant. Reduce the refrigeration dose appropriately.

2. Poor heat dissipation. Check the condenser pipe for dirt and dirt and clean the condenser. 3. The pipeline system is blocked.

Refer to the pressure gauge to judge, eliminate, and re-process systematically. 4. Dust and fouling of the evaporator or filter screen. The airflow becomes smaller, the system pressure and temperature are unstable, and the evaporator or filter is cleaned.

5. Fluoride deficiency is also possible. When there is a lack of fluorine, the compressor discharge temperature will overheat, causing the overheating load protection switch to trip. The electrical problem is:

1. Control circuit board failure. 2. The temperature sensor is overloaded and the information is wrong. 3. The power supply wiring is loose and the contact is poor.

There are four reasons why the air conditioner will automatically turn on and off for a while1It may be that the weather is too hot, and the radiator of the outdoor unit is dirty and the heat cannot be dissipated. 2.

It is generally recommended to clean the air conditioner with clean water or spray some air-conditioning cleaner and then spray some water. 3.If the air conditioner is just turned on and refrigerated normally, it is necessary to focus on checking whether the speed of the fan is normal.

4.Usually, the attitude of the external fan does not rotate, and the slow speed will affect the normal operation of the air conditioner, and the slow speed will affect the normal operation of the air conditioner.

Household circuit judgment: it may be that the circuit at home is intermittent, and then it is powered on again, and the air conditioner restarts to cause the air conditioner switch to fail, at this time open the air conditioner cover, there is a manual switch in the air conditioner, and turn to the automatic top to adjust to the operation.

Automatic power on and off due to air conditioner setting: Turn down the temperature of the air conditioner setting to keep the air conditioner working, if the air conditioner is in automatic mode, then change it to large, medium and small mode, so as to avoid automatic shutdown because the indoor temperature reaches the preset value of the air conditioner.

Precautions for turning on the air conditioner.

When the air conditioner is turned on, the doors and windows will be closed tightly to prevent the air from leaking. After a long time, the indoor air will become turbid because it cannot be circulated, and because the air conditioner will reduce the humidity in the air, people are prone to symptoms such as dry and itchy throat and nose irregularity. Therefore, it is recommended to open the windows for ventilation every hour when the air conditioner is turned on, and people in an air-conditioned environment should drink more water and eat more vitamin-rich fruits.

Just enter the house, turn on the air conditioner after 10 minutes: If you just run into the house from the outside sweating profusely, don't turn on the air conditioner immediately, cool it for ten minutes, and then turn on the air conditioner after the temperature drops. In addition, be sure to turn off the air conditioner or set a timer to turn off before going to bed.

The above content refers to People's Daily Online-How should the air conditioner be blown? The most important thing is to get the "posture" right.

Encyclopedia - Air conditioning.

It is recommended to use a multimeter to test whether the voltage is stable, if it is not a voltage problem, then it may be a circuit problem on the air conditioning control board, or the filter capacitor may be broken, so that it will automatically turn on.

Fault judgment method: power on and listen carefully to whether the operating sound of the air conditioner compressor is normal, whether there is abnormal sound, whether there is noise when the fan is running, whether the noise is too loud, etc. If the vibration and noise are excessive, the possible causes are:

Foam plastic pads, etc., can make the air conditioner vibrate and noise more when it is running, especially when it is just started and stopped. When the chassis collides, the axis of the fan moves, and the blades lose their balance.

Generally, it is a fault caused by the virtual soldering of the control circuit board.

It would be nice to change the button caused by the poor contact of the main switch power button.