Finding an installation location thermostat in Hotpoint Ariston refrigerators often becomes the first step in self-diagnosis of a breakdown. Owners of household appliances are faced with the need to replace this unit when the refrigerator stops turning off or, conversely, does not reach the desired temperature. Understanding the design of your model Hotpoint Ariston is critically important, since the location of sensors and controls can vary dramatically depending on the year of manufacture and series of the device.
Modern models are often equipped with electronic control, where the classic mechanical thermostat is replaced on touch module or a remote sensor integrated into the common control board. At the same time, older or budget lines still use reliable mechanical switches that physically open the circuit when the specified parameters are reached. The exact location of the temperature control element directly depends on the type of defrosting system (No Frost or drip) and the number of compressors.
In this article we will go into detail We’ll figure out where exactly to look for this important unit in various modifications of the brand, how to safely get to it and what tools will be needed to carry out the work. Incorrect determination of the type of regulator can lead to the purchase of the wrong spare part or damage to the internal wiring, so careful study of the instructions will help to avoid unnecessary costs.
Types of temperature control systems in Hotpoint Ariston
Before you begin disassembling the case, you need to determine what type of temperature control is installed in your unit. In the lines Hotpoint Ariston there are three main configurations: a mechanical thermostat with a handle inside the chamber, an electronic unit with a display on the door and hidden electronic sensors. The mechanical version is a device with a capillary tube that responds to changes in freon pressure.
Electronic systems work differently: they use thermistors (resistors that change resistance depending on temperature), which send signals to the main board. Electronic module it independently decides whether to turn the compressor on or off. If your model has a digital display on the outer panel of the door, then the classic thermostat with a knob inside the chamber is not physically there.
Determining the type of system is a fundamental diagnostic stage. Trying to find a mechanical adjustment knob in an electronically controlled model will only waste time. A visual inspection of the control panel and the inside of the refrigerator compartment gives an initial understanding of what equipment you are dealing with.
- 🔍 Mechanical thermostat: has a rotary knob with numbers or divisions located inside the refrigerator compartment.
- 💻 Electronic control: panel with buttons and display on the outside of the door, no knob inside.
- 📡 Hidden sensor: may look like a small plastic tip built into the wall or hidden behind a decorative panel.
⚠️ Attention: In models with the No Frost system, a mechanical thermostat is extremely rare. If you have a two-chamber refrigerator with automatic defrosting, most likely, control is carried out through an electronic board and air sensors.
Location of the mechanical thermostat
If your refrigerator Hotpoint Ariston has mechanical adjustment, The thermostat is most often hidden inside the refrigerator compartment. The standard installation location is the upper left or right corner, directly under the ceiling of the camera. In some models, the control knob is built into the lampshade or located next to it.
Access to the thermostat body itself may be limited by a decorative trim. To see the mounting screws, sometimes it is enough to simply remove the plastic plug that hides the adjustment knob. However, in some cases, partial disassembly of the internal lining is required, which requires care not to damage the fragile plastic at low temperatures.
The capillary tube coming from the thermostat is usually attached to the evaporator or hangs freely in the air flow, controlling the air temperature. When replacing, it is important not to damage this thin tube, since its deformation will lead to incorrect operation of the entire assembly. Fastening elements can be hidden under a layer of insulation or sealant.
How to remove the thermostat handle?
Handle The mechanical regulator is often removed by simply pulling it towards you. If it fits tightly, you can carefully pry it with a flat screwdriver through a soft cloth so as not to scratch the plastic. In some models, a locking screw is hidden under the handle, which must be unscrewed before removal.
Electronic sensors and their location
In modern models with a display, the role of a regulator is performed thermistors. These compact elements have no user interfaces inside the camera, as all settings are made externally. Sensors can be located in different zones: in the refrigerator compartment, in the freezer, in the zero temperature zone or in the air supply duct.
Finding a faulty sensor requires knowledge of the circuit of a specific refrigerator Hotpoint Ariston. They are often located in hard-to-reach places: behind the back wall, under plastic ceiling panels, or even built into polyurethane foam insulation. To access them, you often have to completely dismantle the inner lining of the camera.
Diagnostics of electronic components is carried out using a multimeter by measuring resistance. Normal resistance values depend on temperature and the specific sensor model. If the resistance of the sensor does not change with temperature changes or shows a break, the element must be replaced.
| Sensor type | Probable installation location | Function |
|---|---|---|
| Air sensor | Upper part of the chamber, under ceiling | General temperature control |
| Evaporator sensor | Behind the rear panel, on the evaporator fins | Defrost control |
| Defrost sensor | At the bottom of the evaporator | Control of completion of defrosting |
| Freezer sensor | In the freezer compartment | Adjusting the cold in the freezer |
Dismantling and access to the adjustment unit
The process of gaining access to the thermostat or sensor in refrigerators Hotpoint Ariston requires compliance with a certain sequence of actions. The first step should always be to completely unplug the device. This safety rule cannot be ignored, since the work will be carried out in close proximity to electrical circuits.
Removing the internal panels most often requires a Phillips screwdriver and, possibly, a spatula to unclip the plastic latches. The plastic in the refrigerator can be fragile, especially if the device has been operating at low temperatures for a long time, so all movements must be smooth. If the panel cannot be removed, check whether you forgot to unscrew the hidden screws.
☑️ Preparation for dismantling
After removing the decorative trims, access to the technical niche opens. In mechanical models, the thermostat is usually mounted on a bracket or clothespin. In electronic ones, sensors can be soldered into board connectors or connected through chips. It is important to remember or photograph the color marking of the wires before disconnecting them.
Diagnostics of thermostat malfunctions
You can understand that it has failed thermostatby characteristic signs. If the refrigerator runs continuously without turning off and the food in the compartment begins to freeze (in the refrigerator compartment), this is a classic symptom of stuck thermostat contacts. The opposite situation is that the unit does not turn on at all or operates in very short cycles.
For mechanical thermostats, there is a simple test: with the refrigerator unplugged, short-circuit the wires going to the thermostat (bypassing the device itself). If the compressor starts working after being plugged in, then the problem is in the regulator. However, this method requires caution and knowledge of basic electrical engineering.
Electronic systems are self-diagnosis: error codes may appear on the display indicating a malfunction of a specific sensor. For example, flashing temperature lights may indicate a thermistor failure. In such cases, replacing the element often solves the problem, but sometimes flashing or replacing the control board is required.
⚠️ Attention: Do not try to adjust a mechanical thermostat by moving the knob beyond the standard range (all the way). This can lead to breakdown of the internal mechanism and the need to completely replace the unit.
Nuances for models with two compressors
In two-compressor models Hotpoint Ariston the situation is complicated by the presence of independent cooling circuits. In such refrigerators, two separate thermostats can be installed: one for the refrigerator compartment, the other for the freezer. They are located in the corresponding compartments and control their compressors independently of each other.
If only one chamber has stopped cooling, the thermostat or sensor of this particular circuit is checked first. The compressor of the second chamber can continue to operate normally. This important difference allows you to localize the problem faster than in systems with one compressor and one regulator.
Replacement in such models requires care not to mix up the wires from different circuits. The markings on thermostat terminals usually correspond to the diagram located on the back wall or in the technical documentation. An error during connection can lead to incorrect operation of the system or a short circuit.
Recommendations for replacement and assembly
When installing a new thermostat or sensor, make sure that the capillary tube (in mechanical models) is laid exactly the same as the old one. Bends or creases in the tube are not permitted. The fastening should be secure, but without excessive force, which could crush the body of the device.
After assembling all the panels and connecting the wires, do not rush to load the products. Let the refrigerator Hotpoint Ariston run idle for several hours. This will allow the system to enter mode and confirm that the thermostat is installed correctly. If the on-off cycle has returned to normal, the repair can be considered successful.
If the problem persists after replacement, it may not be the case in the regulator, but in a freon leak or compressor malfunction. In such cases, self-repair may be ineffective, and you will need to call a technician for a deeper diagnosis of the refrigerant system.
Is it possible to use a thermostat from another brand?
The use of analogues is possible, but only if the mounting dimensions, capillary tube length and electrical characteristics match. For electronic sensors, compatibility is even more critical: the resistance and temperature coefficient must strictly correspond to the original, otherwise the refrigerator will not work correctly.
Why does the refrigerator turn on immediately after defrosting?
This may indicate a malfunction of the thermostat, which is “stuck” in the “on” position, or a refrigerant leak. Also, the reason may be damage to the door seal, due to which heat constantly enters the chamber, and the sensor does not give the command to turn off.
How to understand that it is the thermostat that is broken and not the board?
In mechanical models, test the thermostat contacts with a multimeter: at room temperature they should ring (be closed), and when cooled (for example, in freezer) - open. In electronic models, the resistance of the sensor is checked: if it is infinite or equal to zero at normal temperature, the sensor is faulty. If the sensor is intact, but the command does not pass, the problem is in the board.