You turned on the washing machine, and the lights in the apartment suddenly went out - and the machine in the control panel turned off? This situation is familiar to many equipment owners, especially in older homes or when connecting powerful models. Knocking out a machine gun when starting the washing machine, this is not just an inconvenience, but a signal of potentially dangerous malfunctions: from network overload to a short circuit in the motor.

In 80% of cases, the problem is solved without calling an electrician, but it is important to correctly diagnose the cause. In this article we will look at all possible reasons - from a banal overload of the socket to a breakdown of the heating element, and we will also give step by step instructions for testing and troubleshooting. We will pay special attention washing machines with direct drive (LG, Samsung) and models with high power consumption (for example, Bosch Serie 8 or Indesit with drying function).

If you are not confident in your abilities, it is better to call a professional. But many malfunctions (for example, burnt-out power filter or oxidized plug contacts) can be eliminated independently in 10-15 minutes.

1. Electrical overload: why the machine can’t handle the washing machine

The most common reason for a machine being knocked out is exceeding the permissible load to the line. Modern washing machines consume from 1.5 to 3.5 kW, and when heating water or spinning at maximum speed, the current can reach 15-16 A. If other appliances (for example, a microwave or electric kettle) are connected to the same outlet, the total load exceeds the rating of the machine.

How to check:

  • 🔌 Look at the machine's denomination in the shield. For the washing machine you need an automatic machine 16 A (or 20 A for powerful models). If it's worth 10 A - it definitely needs to be replaced.
  • 📊 Calculate total load to the line. The total power of the devices should not exceed 3.5 kW for machine 16 A.
  • 🔄 Try connecting the washing machine to a different outlet (preferably on a separate line). If the machine does not knock out, the problem is overload.
📊 What is the nominal value of the machine in your dashboard?
10 A
16 A
20 A
25 A
I don't know

Please note machine type:

  • 🔹 Type B — triggers at a current 3-5 times higher than the rated current (suitable for household networks).
  • 🔹 Type C — withstands short-term overloads (used for powerful devices).
  • 🔹 Type D — for industrial equipment (not suitable for home use).
⚠️ Attention: If there is an automatic machine in the panel D, it must be replaced with B or C - otherwise it will not protect the wiring from overheating.

2. Malfunctions in the washing machine: what to check first

If the machine knocks only when you turn on the washing machine (and other devices work fine), the problem lies in the machine itself. The most common malfunctions:

Malfunction Signs How to check
Short circuit in heating element The machine knocks out when heating the water (5-10 minutes after starting) Test the heating element with a multimeter (resistance should be 20-40 Ohms)
Engine breakdown Knocks out during spin cycle or immediately after starting Checking the motor windings for resistance (should be 10-100 Ohms)
Faulty surge protector The machine crashes when plugged in (even without starting the program) Inspect for swollen capacitors or burnt traces
Problems with the control board Random knockouts, errors on the display (for example, E1 or F2) Diagnosis of errors according to the manual, checking the relays on the board

For diagnostics you will need a multimeter. If it is not there, you can visually inspect the details:

  • 🔍 heating element: Remove the back cover of the machine and check for scale or blackening.
  • 🔧 Engine: when rotating by hand there should be no extraneous sounds (creaks, knocks).
  • ⚡ Surge filter: If the plug or cord is melted, they need to be replaced.

Unplug the machine

Drain water (if any)

Remove the back or top cover (depending on model)

Ring the heating element and motor with a multimeter

Check the power cord for damage -->

If you find blackened contacts or a burning smell is a sign of a short circuit. In this case, the washing machine cannot be turned on until the problem is eliminated!

3. Wiring Problems: Hidden Dangers

In houses with old aluminum wiring, knocking out the machine when turning on the washing machine is a common occurrence. Aluminum oxidizes over time, contact resistance increases, and under high load (for example, when heating water), overheating and protection tripping.

How to check wiring:

  1. Unplug all appliances from the outlet to which the washing machine is connected.
  2. Turn on the machine. If it knocks out again, the problem is in the wiring.
  3. Check the socket: tighten the contacts, inspect for melting.
  4. If the outlet is working, call an electrician to check the line from the panel to the outlet.

Please note cable section:

  • 🔹 For washing machines with power up to 2.5 kW enough cable 2.5 mm².
  • 🔹 For models more powerful 3 kW (for example, Samsung WD90T654DBW with dryer) cable required 4 mm².
How to determine cable cross-section without tools?

If there is no marking on the cable, you can approximately estimate the cross-section based on the core diameter:

- 1.8 mm ≈ 2.5 mm²

- 2.2 mm ≈ 4 mm²

- 2.8 mm ≈ 6 mm²

For accurate measurements, use a caliper or micrometer.

⚠️ Attention: If the shield is RCD (residual current device), and it trips together with the machine - this is a sign leakage current. Possible reasons: breakdown of the heating element on the housing or damage to the wire insulation. In this case, the washing machine cannot be used until repaired!

4. Malfunctions of the RCD and machine: when the shield is to blame

Sometimes the problem lies not in the washer or wiring, but in the shield. An automatic device or RCD can be:

  • 🔹 Faulty (contacts are burnt, mechanism is worn out).
  • 🔹 Incorrectly selected (for example, RCD with leakage current 10 mA instead of 30 mA).
  • 🔹 Poorly secured (loose terminals cause heat).

How to check:

  1. Unplug all devices.
  2. Turn on the machine. If it knocks out without load, it needs to be replaced.
  3. Check the RCD: press the "Test" button. If it does not work, the RCD is faulty.
  4. Inspect the terminals: if they are blackened, tighten the contacts or replace the machine.

For the washing machine we recommend:

  • 🔹 Automatic: 16 A (type C).
  • 🔹UZO: 25 A / 30 mA (to protect against current leakage).
💡

If the panel contains cheap machines from an unknown manufacturer (for example, IEK or EKF), it is better to replace them with ABB, Schneider Electric or Legrand. They are more expensive, but more reliable and last longer.

5. The influence of humidity and grounding: why does the washing machine shock?

In a bathroom or kitchen where the washing machine is usually located, high humidity can cause leakage current. If the machine is not grounded or the grounding is poor, this leads to:

  • 🔹 Triggering of the RCD.
  • 🔹 Electric shock when touching the body.
  • 🔹 Corrosion of contacts inside the car.

How to check grounding:

  1. Look at the socket: it should have three contacts (phase, neutral, ground).
  2. If there is no grounding, connect the washing machine via RCD or install a separate line with grounding.
  3. Check the ground resistance with a multimeter (should be no more than 4 ohm).

If the washing machine is in the bathroom, be sure to:

  • 🔹 Use a socket with a cover (protection IP44 or higher).
  • 🔹Connect your car via surge protector with protection against power surges.
  • 🔹 Dry the room regularly (humidity should not exceed 60%).

6. Power surges: how they affect the washing machine

In some houses (especially in rural areas or old neighborhoods) the network voltage is unstable. If it falls below 190 V or rises higher 250 V, this may cause:

  • 🔹 False operation of the machine (due to increased current).
  • 🔹 Electronics failure washing machines (control boards, relays).
  • 🔹 Heating element overheating and its failure.

How to protect yourself:

  • 🔹 Install voltage stabilizer (for example, Resanta ASN-2000 or Calm IS350).
  • 🔹 Use voltage control relay (for example, Bison RN-113).
  • 🔹 Connect the washing machine via surge protector with protection against impulse interference.

If the voltage in your network often exceeds the limits 220V±10%, you can’t do without a stabilizer. This will protect not only the washing machine, but also other equipment in the house.

💡

Power surges are one of the main causes of electronic failures in washing machines. Even one strong deviation (for example, 280 V) can damage the control board, and repairs will cost 30-50% of the cost of a new machine.

7. Prevention: how to avoid problems in the future

To prevent your washing machine from kicking out, follow these recommendations:

  • 🔌 Connect the washing machine to separate outlet with grounding (not through an extension cord!).
  • ⚡ Use high-quality machines (for example, ABB S201 C16).
  • 🔧 Check once a year condition of the heating element and contacts (especially if the water is hard).
  • 💧 Do not place the car in rooms with high humidity without ventilation.
  • 📊 Follow line load — do not turn on the washing machine, kettle and microwave at the same time.

If you are buying a new washing machine, pay attention to:

  • 🔹 Maximum power (for apartments with old wiring it is better to choose a model up to 2 kW).
  • 🔹 Availability of surge protection (for example, in models Miele or AEG).
  • 🔹 Engine type: inverter motors (eg in LG Direct Drive) are less susceptible to overheating.

FAQ: Frequently asked questions about knocking out a machine gun

Why does the machine only kick out during the spin cycle?

During the spin cycle, the washing machine motor operates at maximum power (up to 800-1000 W). If the machine operates at this very moment, possible reasons:

  • 🔹 Engine brush wear (current consumption increases).
  • 🔹 Bearing jamming (the motor is overloaded).
  • 🔹 Tachometer malfunction (the engine accelerates to dangerous speeds).

Solution: disassemble the car, check the engine and bearings. If the brushes are worn out, replace them.

Is it possible to replace the machine with a more powerful one (for example, from 16 A to 25 A)?

No! The machine must comply wiring cross-section, and not the power of the devices. If you put an automatic 25 A on cable 2.5 mm², the wiring will overheat, which may cause a fire.

Correct solution:

  • 🔹 Lay a separate line with cable 4 mm² and put the machine gun 20 A.
  • 🔹 Or reduce the load on the line (do not turn on the washing machine at the same time as other devices).
The washing machine is new, but the machine breaks down. What to do?

Possible reasons:

  • 🔹 Defective heating element or motor (found even in new cars, for example, Indesit BWSA 61052).
  • 🔹 Incorrect connection (for example, to a socket without grounding).
  • 🔹 Weak network in the house (the machine or wiring is not designed for the power of the machine).

Solution:

  1. Check the connection (the socket must be grounded, the cable must be at least 2.5 mm²).
  2. If the problem persists, contact the service center under warranty.
How to ring a heating element with a multimeter?

Instructions:

  1. Unplug the machine.
  2. Remove the back cover, find the heating element (usually at the bottom of the tank).
  3. Disconnect the wires from the heating element.
  4. Set the multimeter to resistance test mode (200 Ohm).
  5. Touch the probes to the contacts of the heating element. Normal resistance: 20-40 Ohm.
  6. If the device shows 0 (short circuit) or 1 (break) - the heating element is faulty.

Also check the heating element for breakdown on the body: one probe on the contact, the second on the body of the heating element. If the resistance is not ∞ — The heating element is broken and requires replacement.

What to do if the automatic machine knocks out?

A difavtomat (automatic machine + RCD in one housing) is triggered for two reasons:

  1. Overcurrent (like a regular machine).
  2. Leakage current (like an RCD).

How to determine the cause:

  • 🔹 If the automatic machine works immediately when you turn on the washing machine, it is likely leak (breakdown of heating element or motor).
  • 🔹 If it works after 5-10 minutes (when heating water) - overload (weak wiring or faulty heating element).

Solution: Check the washer for leaks (with a multimeter or call an electrician), and also make sure that the wiring can withstand the load.