Sudden stoppage of the compressor or characteristic clicks during operation of the equipment often indicate problems with the starting mechanism. If your Indesit stops freezing, but the light inside is on, the first thing you should suspect is a failure of the start relay. This small but critical element is responsible for starting the engine and its operation under load.
Relay diagnostics is a basic skill that will help you save on calling a technician. In most cases, you can check the part yourself using a minimal set of tools. However, it is important to understand that electrical diagram the refrigerator requires careful handling to avoid short circuits or electric shock.
Before you begin disassembling, you need to make sure that the problem lies precisely in the starting mechanism, and not in the compressor or thermostat itself. In this article we will analyze all the stages of testing, from visual inspection to testing the contacts with a multimeter, so that you can accurately determine the cause of the breakdown.
Signs of a faulty starting relay
You can determine that the relay has failed by the characteristic sounds and behavior of the compressor. Owners often notice that the refrigerator Indesit hums for a few seconds, and then there is a loud click, after which the motor goes silent. This is a classic symptom that the starter is unable to start the motor winding.
Sometimes the situation looks different: the compressor does not make any sounds at all, although the power indicator is on. In this case, the circuit may be broken inside the relay itself, and the current simply does not reach the motor. It is also worth paying attention to the appearance of the part; if it has melting or traces of burning, then replacement is inevitable.
There are several key symptoms indicating the need for diagnostics:
- 🔊 The compressor makes a loud click and immediately turns off without starting.
- ❄️ The refrigerator has stopped cooling, but operates in normal mode only intermittently.
- ⚡ When you touch the relay housing, a slight vibration is felt or a hum is heard without starting the motor.
- 🔥 Traces of overheating, blackening or the smell of melted plastic are visible on the part body.
If you If you observe at least one of the listed symptoms, most likely the problem lies in the starting device. However, you should not immediately buy a new part, as sometimes the reason may be oxidation of contacts or sticking of moving parts.
⚠️ Attention: If after clicking the compressor continues to hum quietly for more than 10-15 seconds, immediately unplug the refrigerator. This may indicate a motor wedge or an interturn short circuit, and further attempts to start will lead to burnout of the windings.
Preparation for diagnostics and safety measures
Before starting any work with electrical appliances, you must strictly follow the safety rules. First of all, de-energize the refrigeratorby removing the plug from the socket. Working under voltage is strictly prohibited and can lead to serious injuries.
To carry out high-quality diagnostics, you will need a minimum set of tools. The main device will be a multimeter (tester), which allows you to ring the circuit for an open or short circuit. You may also need a flat-head screwdriver for removing terminals and pliers.
It is important to ensure good lighting of the work area, since the back wall of the refrigerator is often located in a dark corner. If you work in the evening, use an additional light source to clearly see the markings of the wires and the condition of the contacts.
Check the integrity of the multimeter probes and set the device to the resistance (Ohm) or continuity measurement mode. Before touching parts, make sure your hands are dry and the floor under your feet is not wet to eliminate the risk of electric shock from residual charge in capacitors.
☑️ Safety check before repair
Removal and visual inspection of the relay
To get to the starting relay, you need to remove the rear protective cover at the bottom refrigerator Indesit. It is usually secured with several screws or latches. After removing the cover, you will see a compressor with a small plastic barrel attached to the bottom or side - this is our relay.
Carefully remove the latch or bend the spring tabs holding the relay casing. Do not pull sharply, as there may be wires coming to the cover that can be easily damaged. After removing the cover, disconnect the connectors, first remembering or photographing their location.
During a visual inspection, pay attention to the following details:
- 👀 The presence of cracks on the relay body through which moisture can enter.
- 🖤 Traces of soot or carbon deposits on the contact groups inside housing.
- 🧊 Foreign objects or moisture inside the housing, causing a short circuit.
- 🔌 Melting of plastic connectors, indicating overcurrent.
If the relay housing is marked PTC or CSR, this will help determine the type of device. Thermal relays often have a visible bimetallic strip that opens the circuit when heated. If no visual defects are found, we proceed to an instrumental check.
Types of relays in Indesit refrigerators
In modern models, posistor (PTC) relays are more common, which do not have moving contacts and operate by changing the resistance of the crystal. Older models use electromagnetic relays with a moving core, which are noisier and subject to mechanical wear.
Checking a relay with a multimeter: step-by-step instructions
The most reliable diagnostic method is to test the contacts with a multimeter. To do this, remove the relay from the compressor and disconnect all wires. Turn the relay over so that you can see the contact pins that are inserted into the compressor.
Set the multimeter to resistance measurement mode (200 Ohm range). Touch the probes to the relay contacts. In a working posistor relay, the resistance between the main contacts should be within the normal range, usually from 10 to 50 Ohms, depending on the model. If the device shows one (infinity) or zero, the relay is faulty.
For thermal relays, it is important to check the passage of current through the bimetallic plate. When cold, the circuit should ring (resistance is close to zero). If you heat the relay (for example, with a hairdryer) and the circuit breaks, this is normal, but it should recover after cooling.
The table below will help interpret the device readings:
| Measurement type | Multimeter readings | Diagnosis |
|---|---|---|
| Winding resistance | 10–50 Ohm | Normal (proper) |
| Winding resistance | Infinity (1) | Open circuit (faulty) |
| Winding resistance | 0 Ohm | Short circuit (faulty) |
| Thermal relay (cold) | 0 Ohm (beeps) | Normal |
If after checking it turns out that the relay does not pass current or has critical resistance, it must be replaced. There is no point in repairing a burnt posistor or melting the contacts - the part is disposable.
Analysis of the condition of the compressor windings
Before installing a new relay, it is extremely important to ensure that the compressor itself is in good condition. If the relay burns out due to a motor wedge, the new part will also fail after a few minutes of operation. Checking the motor windings is carried out through the same contacts where the relay was connected.
Locate the three terminals on the compressor (usually they are located in a triangle). You need to call them among themselves. The resistance between the working and starting windings should be the sum of the resistances of each winding relative to the common wire. Typical values for refrigerators Indesit are from 10 to 40 Ohms.
It is also necessary to check that there is no breakdown on the housing. Press one multimeter probe to the cleaned area on the compressor housing (where there is no paint), and touch each of the three contacts with the other. The device should show infinity. If there is any resistance, the compressor is broken and dangerous for use.
Common mistakes when replacing yourself
Many users, trying to save money, make mistakes that lead to repeated breakdowns. The most common of them is installing a relay with inappropriate characteristics. Visually they may be the same, but the difference in the operating current is critical.
Another mistake is ignoring the condition of the capacitor. The starting capacitor is often paired with a relay. If it is swollen or has lost capacity, the relay will overload. Always change this combination comprehensively if there is any doubt about the age of the equipment.
Incorrect orientation of the relay during installation is also common. There is an arrow on the body indicating the direction UP (top). If you install the relay upside down, gravity will not allow the mechanism to work correctly, or the posistor will not cool naturally.
⚠️ Attention: Technical characteristics of refrigerators Indesit may vary depending on the year of manufacture and the specific series. Always check the parameters of the parts with the official documentation or markings on the nameplate of your device.
FAQ: Frequently asked questions
Is it possible to start a refrigerator without a relay?
Theoretically, you can start the compressor by applying voltage directly to the windings, but doing this is strictly not recommended for domestic use. Without a protection relay, the compressor will quickly overheat and burn out, since it will not turn off when overloaded.
Where can you find the relay markings on an Indesit refrigerator?
The markings are applied to the plastic body of the relay itself (for example, R600, PTC 15 Om). Information can also be found on the sticker on the back wall of the refrigerator, which indicates the type of refrigerant and compressor model.
Why did the new relay burn out immediately after installation?
Most likely, the reason is not the relay, but a malfunction of the compressor (interturn short circuit or wedge) or the starting capacitor. It is also possible that a part with an inappropriate posistor resistance was selected.
How often do you need to change the relay in the refrigerator?
A relay is a consumable item, but with a stable voltage in the network it lasts 5-10 years or more. Frequent power surges significantly reduce its service life, so it is recommended to use a stabilizer.