Brand refrigerators Ariston, like any complex household appliances, are equipped with an electronic control system that regulates the operation of the compressor and evaporator. The central element of this system is a temperature sensor that continuously reads data about the microclimate inside the chambers. When users wonder where the Ariston refrigerator temperature sensor is located, they most often encounter the problem of incorrect operation of the unit: food either gets frozen, or, conversely, begins to deteriorate due to insufficient cold.
The exact location of this important element depends on the specific model of your device and the type of cooling system. In some cases, this may be an open part at the top of the refrigerator compartment, in others it may be an element hidden under a plastic panel on the back wall. Understanding the design of your model Ariston is the first step to successful diagnostics.
In this article we will analyze in detail all possible options for placing thermal sensors, consider their design features and provide a step-by-step algorithm for actions when a malfunction is detected. It is important to understandthat tampering with the electrical circuit requires compliance with safety measures, therefore, before starting any work, you must disconnect the device from networks.
Design features of the Ariston cooling system
The thermoregulation system in refrigerators Ariston is based on the use of thermistors - semiconductor elements, the resistance of which varies depending on the ambient temperature. Unlike old mechanical thermostats with a capillary tube, modern electronic sensors are highly accurate, but are more sensitive to changes in voltage and humidity. Depending on the energy efficiency class and year of manufacture, your refrigerator may have one common sensor or a whole network of several sensors.
The most common configuration for models with the system No Frost or Total No Frost includes at least two main sensors: one monitors the air temperature in the refrigerator compartment, and the second monitors the evaporator temperature in freezer compartment. In more advanced models with a freshness zone or a separate cooling circuit, there may be additional sensors responsible for specific temperature zones. Electronic control module processes signals from all these elements and makes a decision to turn the compressor on or off.
The location of the temperature control elements is thought out by engineers to ensure the most representative measurements. The air sensor is usually located in the upper third of the refrigerator compartment, since cold air is heavier than warm air and sinks down. Evaporator sensors, on the contrary, are hidden deep inside the structure, often behind plastic panels, in order to measure the temperature of the cooling element directly during operation.
⚠️ Attention: The design of refrigerators Ariston may vary significantly depending on the series. The schematic arrangement of parts in the user manual is often given in a simplified form, so when troubleshooting, rely on visual inspection and technical features of a particular modification.
Main locations of temperature sensors
If you are looking for the answer to the question of where the temperature sensor of the Ariston refrigerator is located, you should consider three main areas. The first and most accessible area is the top of the refrigerator compartment. Here, on the ceiling or on the top of the back wall, you can often see a white plastic housing, inside of which the sensitive element is hidden. It may look like a small box or be integrated into the system grid No Frost.
The second zone is the interior of the freezer. In models with manual defrosting, the sensor can be built into the wall or located next to the thermostat if it is mechanical. However, in modern automatic defrost systems, the evaporator sensors are located behind the rear panel of the freezer. It is impossible to get to them without partially disassembling the unit, since they are attached directly to the evaporator tubes or in special grooves of the aluminum radiator.
The third possible location is the freshness zone or zero chamber, if such an option is provided in your model. Ariston. Here the sensor can be built into the bottom of the compartment or into the side wall. In some cases, manufacturers hide sensors under decorative covers or in niches for lighting lamps so that they do not interfere with the placement of products and are not subject to mechanical stress.
The search should begin with a visual inspection of the available places. If you see a plastic element with perforations or a characteristic shape on the ceiling of the refrigerator compartment, most likely that is where the one you are looking for is hidden. Be careful when inspecting: the plastic in old refrigerators can be fragile. thermostat. Be careful when inspecting: the plastic in older refrigerators can be brittle.
Symptoms of a faulty temperature sensor
Before you start searching and replacing, you need to make sure that the problem lies in the sensor. The absence of cold or, conversely, an ice crust does not always indicate a breakdown of the sensor. However, there are a number of characteristic signs that with a high degree of probability indicate the failure of this particular element of the control system.
One of the main symptoms is the continuous operation of the compressor without shutdowns. If the refrigerator hums constantly, and the temperature inside drops significantly below the set norm, this may mean that the sensor is “stuck” in the position that requires cooling and is not sending a signal to the module that the target values have been reached. As a result, the food in the refrigerator compartment freezes, and a thick layer of ice forms on the back wall.
The opposite situation is also possible: the compressor does not turn on at all or works very rarely, while the temperature in the chambers rises. In this case, electronic sensor can show the control module that the temperature is normal or even too low, although in reality the refrigerator is warm. This leads to spoilage of food and the appearance of an unpleasant odor.
- ❄️ An uncharacteristically large amount of frost or ice forms on the walls of the refrigerator or freezer, even with a working condensate drainage system.
- 🔊 The compressor makes sounds of frequent switching on and shutdowns (clocking), without having time to enter the operating mode.
- 🌡️ The display (if any) shows erroneous temperature values or error codes associated with temperature sensors (for example, blinking indicators).
- 💡 The light inside the chamber is on, but no cold is generated, although the compressor starts.
Diagnostics and checking the sensor with a multimeter
To accurately determine the malfunction, it is not enough to rely only on external signs. Professional diagnostics require the use of a measuring device - a multimeter. This tool will measure the electrical resistance of the sensor and compare it with reference values. Without this step, replacing a part may be a waste of money and time.
The verification process begins with dismantling the sensor. Once you have reached the element, you need to disconnect its connector from the control board or wiring. Switch the multimeter to resistance (Ohms) measurement mode. The standard resistance of most sensors Ariston at room temperature (about 20-25°C) is approximately 2-5 kOhm, but the exact values depend on the model. When cooled, the resistance should increase (for NTC thermistors) or fall (for PTC), which is checked by placing the sensor in a cold environment.
If the multimeter shows an open circuit (infinity) or a short circuit (zero), the sensor is clearly faulty and requires replacement. It is also worth checking the integrity of the wires leading from the sensor to the connector, as they often break in places of bends or kinks.
☑️ Sensor diagnostics
If you doubt your skills in working with electrical measuring instruments, it is better to entrust this procedure to a qualified technician.
Table of typical resistance values
For ease of verification, we provide approximate resistance values for common types of thermistors used in refrigeration equipment. These data may vary depending on the manufacturer of the sensor itself, even if it is installed in the refrigerator Ariston.
| Sensor type | Temperature (°C) | Resistance (kOhm) | Tolerance |
|---|---|---|---|
| NTC (Refrigerator compartment) | +25 | 2.5 - 3.0 | ±5% |
| NTC (Freezer) | -18 | 12.0 - 14.0 | ±10% |
| Evaporator defrost | +20 | 4.5 - 5.5 | ±5% |
| Universal NTC | 0 | 7.0 - 8.0 | ±5% |
As can be seen from the table, the resistance changes sharply with temperature changes. It is on this principle that the entire operation of the automation system is based. If your measurements differ radically from the tabulated data, replacement of the sensor it is inevitable.
Is it possible to use a universal sensor?
Yes, in many cases you can install a universal thermistor with similar characteristics, but for ideal operation refrigerator, it is better to use original spare parts or their complete analogues recommended by the manufacturer.
Replacement process and technical nuances
Replacing the temperature sensor in the refrigerator Ariston is a procedure that requires accuracy and adherence to the sequence of actions. Once the faulty element has been found and diagnosed, a suitable replacement must be purchased. Original spare parts have special connectors and wire lengths, which simplifies installation, but universal analogues are also widely used in repairs.
To carry out the work, you will need a set of screwdrivers, pliers, possibly a knife for stripping contacts and electrical tape or heat-shrinkable tubing to insulate connections. If the connectors do not match, the wires will have to be connected by twisting followed by soldering, which will provide more reliable contact than simple twisting.
Installation of a new sensor is carried out in the reverse order of dismantling. It is important to correctly position the sensing element in the seat. If it is an air sensor, it should be freely washed by air. If this is an evaporator sensor, it must be pressed tightly to the surface or inserted into the designated hole until it stops; often heat-conducting paste or a special clamp is used for fixation.
⚠️ Attention: When assembling the refrigerator, make sure that the sensor wires are not pinched by the case or sharp edges of the plastic. Damage to the insulation can lead to a short circuit and failure of the control module.
After assembling all panels and returning the refrigerator to its original position, turn it on. In the first hours of operation, longer operation of the compressor may be observed, since the system needs time to stabilize the temperature regime and calibrate the readings of the new sensor.
Frequently asked questions and troubleshooting
Even with detailed instructions, users often have additional questions related to the specifics of their model or non-standard situations. Below we have collected answers to the most popular queries that will help you avoid common mistakes.
Often owners are interested in whether it is possible to temporarily operate a refrigerator with a faulty sensor. This is not recommended, since uncontrolled operation of the compressor can lead to either defrosting of food or freezing of the system and breakdown of the compressor due to water hammer with liquid refrigerant.
Another important aspect is compatibility. Sensors from refrigerators of other brands (for example, Indesit, since the brands belong to the same concern, or Whirlpool) may have similar characteristics, but differ in mounting geometry or wire length. Always check the markings before purchasing.
Is it possible to replace the temperature sensor yourself without special tools?
For a basic replacement, if you already know exactly where the Ariston refrigerator temperature sensor is located in your model and have access to it without complex disassembly, special tools may not be needed. However, for diagnostics (checking resistance), a multimeter is required. Without it, you are acting at random.
Why didn’t the new sensor solve the temperature problem?
If replacing the sensor did not help, the reason may lie in a freon leak, a malfunction of the control module, problems with the compressor start relay, or a leak in the chambers. It is also possible that the installed sensor has inappropriate resistance ratings.
How often should the temperature sensor be replaced?
The service life of a temperature sensor is usually 5-10 years or more. No scheduled replacement required. They change it only when signs of a malfunction appear: incorrect operation of the refrigerator, errors on the display or a continuity signal indicating an open/short circuit.
Does contamination of the sensor affect its operation?
Yes, a layer of grease, dust or ice on the sensitive element can distort the readings, creating a thermal insulating layer. Before installing a new sensor or reinstalling an old one (if it is working), it is recommended to gently wipe it with a soft cloth.
What to do if the sensor wires are too short?
You can extend the wires using copper wire of the same cross-section. The connection must be reliable (soldering preferred) and well insulated. It is important to maintain polarity if it matters for your model, although for thermistors this is usually not critical.