The principle of the lock of the washing machine
Despite its miniature size, the hatch lock device (UBL) is an important element of the washing machine. With its help, the system controls the preservation of the tightness of the body during washing, and in case of any problem it automatically stops the cycle and gives an error signal to the display. Knowing how the lock works on the washing machine, you can not only broaden your horizons, but also be prepared for possible problems. Therefore, we recommend that you know the device and the principle of operation of the locking device in advance, as we will describe in detail below.
How does the door lock function?
A malfunctioning lock does not have to be completely replaced with a new one. Firstly, such a replacement will cost a lot, and secondly, finding an alternative spare part is not easy. Therefore, it is better to understand the door lock device in advance and try to diagnose the cause of the breakdown. It is possible that minor repairs will be possible. Constipation is a small part that looks like a cassette. If you remove the plastic case, you can see:
- a metal plate connected to the spring of the loading hatch cover (the spring passes through a special hole and is mounted on the door body);
- thermistor;
- a bimetal element capable of responding to temperature with a color change;
- contact sockets;
- pin.
Important! The appearance of UBL may vary depending on the model of the washing machine.
Now you can imagine the principle of operation of the hatch lock. The door closes and the hook locks and engages with the plate. Everything is locked in a certain position, after which a signal is sent to the control board. Then an electric current enters the thermistor, which changes the shape of the bimetallic part. She, in turn, pushes the pin, which provokes the complete fixation of all elements of the UBL and the hatch itself.
At the finish, internal contacts close, and a triggered mechanism is reported to the control module. Reverse unlocking occurs as follows: the voltage on the thermistor is turned off, the contacts move away, and the pin and plate become in their original position.
If the device is broken?
A non-functioning UBL, among other failures, may prevent the washing machine from starting a new cycle. To determine exactly whether a lock repair is needed, a couple of steps are enough.
First, open the door, expose the lock and find the movable plate. We move it to the “working” position and connect it to the contacts of the multimeter probes. We evaluate its performance by checking the displayed values with the set norm. Then we do not relax and pay attention to how the locking mechanism behaves after stress relief. If the click did not happen automatically, there are problems.
Faulty constipation leads to unpleasant situations. For example, after completing the washing, the hatch door does not open and the washed items cannot be removed from the drum. To solve the problem, you have to:
- Disconnect the washing machine from the mains and water supply.
- Remove the screws from the rear of the housing and remove the top panel.
- Tilt the machine back.
- Using your hand, move the metal bolt from the hatch hook.
There is also an absolutely opposite situation, when even with strong pressure the UBL does not work, and the door does not close. Accordingly, the washing does not start - there is no signal on the tightness of the drum on the control board. In such cases, most likely, the lock is worn out and weakened. To find out, you need to unscrew the hatch door and check the condition of the blocker with a multimeter and visual inspection.
If a defect is detected, the UBL should be replaced. To do this, the castle will have to be dismantled, and a similar instance should be installed in its place. The algorithm is as follows:
Important! It is recommended that the dismantling be fixed to the camera in order to facilitate the assembly process and to avoid errors and confusion.
- We open the hatch.
- Remove the outer collar from the cuff.
- We fill the rubber seal inside the drum.
- Carefully unscrew the locking bolts.
- We get UBL.
- Mount the new device in the reverse order.
Having figured out how the lock of the door of the washing machine hatch is arranged, you can not panic when the door is locked, but quickly and correctly assess the scale of the problem on your own. The main thing is not to let the machine operate by gravity, not to forget about prevention and thorough care. Then the machine will last a long time and save its owners from accidents, floods, mold and unpleasant odors.
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Washing machine repair
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Dishwasher
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