When water begins to accumulate in the lower part of the refrigerator compartment of your Samsung and food freezes on the shelves, experienced craftsmen immediately suspect problems in the system defrost. Most often, the cause is a failure heating element, which should regularly melt the ice on the evaporator. If this unit stops working, the ice coat grows, blocks air circulation and leads to leaks that spoil the floor and furniture in the kitchen.
Checking the heating element is not just replacing a part at random, but diagnostic processrequiring care and basic knowledge electrical engineering. Modern two-chamber units, such as the popular series RB30 or RL34, are equipped with complex electronics that can block the start of heating in the event of sensor errors. Therefore, before disassembling the back wall, you need to make sure that the problem lies precisely in the burnt nichrome spiral, and not in the control board or thermostat.
In this article we will look in detail at how to safely get to the heater, what tools will be needed for an accurate diagnosis and what to look for during a visual inspection. You will learn to distinguish an open circuit from a short circuit and understand whether it is worth changing the part yourself or is it better to call a specialist. Competent diagnostics will save you money on buying unnecessary spare parts and time for re-disassembling the refrigerator.
⚠️ Attention: All work Diagnostics and repair of electrical appliances should be carried out only after the device is completely disconnected from the power supply. Residual voltage in capacitors can be dangerous.
Symptoms of a malfunctioning heating element
It is possible to understand that Evaporator heating element or the heating element of the drip drain has stopped functioning by a number of indirect signs that appear long before the refrigerator finally fails. The first alarm bell is often the formation of a “coat” of ice on the back wall of the refrigerator compartment, even if the operating mode has not changed. In good condition, the No Frost or drip system should automatically remove moisture, preventing it from turning into a hard shell.
If you notice that Samsung started to work louder than usual, and the compressor cycles have become longer, this may indicate that the fan is having difficulty running air through an ice-clogged evaporator. Also, puddles may appear on the floor in front of the refrigerator, which indicates that the drain pan is overfilled due to the fact that the water does not have time to evaporate or drain. In some models, an error code lights up on the display, for example 12C or 22C, which directly indicates problems in the defrost circuit.
It is important to distinguish between symptoms when the heating element does not heat at all, and when it heats, but not effectively enough. In the second case, microcracks may form on the spiral, increasing the resistance, or the heater itself may be partially covered with scale and dirt. Visual inspection in such cases, obvious breaks may not be detected, so an instrumental check with a multimeter cannot be avoided. Ignoring these signs leads to increased energy consumption and accelerated wear of the compressor.
Preparation for diagnostics: tools and safety
Before proceeding with disassembly and testing electrical circuitit is necessary to prepare a workplace and appropriate tools. You will need a Phillips panel screwdriver, a putty knife, or a plastic card to carefully pry the clips off without damaging the plastic. The main tool will be a multimeter (tester), which will allow you to measure the resistance of the heater and check it for breakdown on the case.
Be sure to make sure that you have access to good lighting, since the insides of the refrigerator, especially in the area of the evaporator, are often hidden deep in the case. Also prepare a container for defrosting if there is a large amount of ice inside, and a hairdryer to speed up the process, if necessary. Do not use sharp metal objects to chip ice, as you can damage the tubes refrigerant blower, which will lead to freon leakage.
☑️ Preparing to check the heating element
Safety comes first. Even if you unplug the cord from the outlet, there may be elements inside that store a charge, although this is rare in heating element circuits. The main rule: never start disassembling while the device is plugged in. If you use a hair dryer for defrosting, make sure that hot air does not directly hit the plastic parts of the case or wiring, so as not to cause their deformation.
Access to the heating element: disassembling the refrigerator compartment
The process of gaining access to the heating element in refrigerators Samsung is usually standard, but has its own nuances in depending on the model. Most often, the heating element is located behind the rear panel inside the refrigerator compartment. First, you need to completely empty the chamber of food, remove the shelves, vegetable drawers and guides so that nothing interferes with the work.
The back wall covering the evaporator can be attached with self-tapping screws or held on by plastic latches. In some models evaporator panel it is additionally fixed with temperature sensors, which must be carefully disconnected. If the panel is frozen, do not pull it by force - it is better to wait 15-20 minutes or gently warm the joints with a hairdryer so that the plastic becomes more elastic and does not crack.
After removing the panel, you will see an aluminum evaporator radiator, at the bottom of which the heating element is located. It may look like a metal tube bent to the shape of the bottom, or like a quartz element in a glass bulb. Carefully inspect the area around: if traces of burning, melted wiring or swelling on the element itself are visible, these are clear signs that malfunction a malfunction has been found
⚠️ Attention: When removing the panel, be careful with the capillary tube. Damage to it will lead to an immediate release of refrigerant and will require expensive professional repairs with refilling.
Methods for checking a heating element with a multimeter
The most reliable diagnostic method is to measure electrical resistance. To do this, switch the multimeter to resistance measurement mode (Ohm), selecting the limit of 2 kOhm or 20 kOhm. Disconnect the terminals from the heating element terminals to exclude the influence of other circuit elements on the device readings. Touch the probes to the contacts of the heater.
A working heating element should show resistance in a certain range, usually from 200 to 500 Ohms, depending on the power of the specific model. Samsung. If the device shows one (infinity), it means that the circuit breakand the nichrome spiral has burned out. If the resistance is close to zero, this may indicate a short circuit, although for heating elements this is less typical than a break.
It is extremely important to check the heating element for breakdown to the body. To do this, press one multimeter probe to the heater terminal, and the second to the metal part of the heating element or evaporator body. The device should show infinity. If you see any resistance values, it means that the insulation is broken, and the use of such an element is deadly, since current can flow to the refrigerator body.
The nuances of measuring resistance
When measuring resistance, take into account the temperature of the element. A cold heating element may have slightly less resistance than a hot one. Also remember that cheap multimeters may have an error, so if the value is close to the limit, it is better to double-check with another device.
Sometimes it happens that visually the heating element is intact, there are contacts, but it does not heat. This may be due to internal oxidation of nichrome at the point of contact with the terminals. In such cases, it is recommended to clean the contacts with fine sandpaper and repeat the procedure. If the result has not changed, the part is subject to unconditional replacement.
Table of normal resistance values
For ease of diagnosis, we present approximate resistance values for various types of heaters used in Samsung equipment. Remember that the exact data is always indicated on the labeling of the element itself or in the service documentation.
| Heating element type | Power (W) | Normal resistance (Ohm) | Probable malfunction |
|---|---|---|---|
| Heating element of the evaporator (tubular) | 150 - 200 | 250 - 350 | Broken spiral, corrosion |
| Heating element of the droplet drain (glass) | 10 - 20 | 1500 - 2500 | Mechanical destruction of glass |
| Heating element of the door (anti-condensation) | 5 - 10 | 3000 - 5000 | Oxidation of contacts |
| Ceramic heater | 100 - 150 | 300 - 450 | Ceramic cracks |
If your measurements differ radically from the tabular data, this is a reason to think about buying a new spare part. You should not try to “reanimate” a burnt heating element by twisting or soldering, since in conditions of high humidity and low temperatures such connections will not last long.
Checking associated elements of the defrosting system
It often happens that the heating element itself is working, but the defrosting system still does not work. In this case, other components such as defrost sensor (thermostat) or fuse may be the culprits. The sensor opens the heating circuit when the evaporator has warmed up to a certain temperature, protecting the system from overheating. If it is “stuck” in the open state, the current simply will not reach the heating element.
The fuse (thermal fuse) serves as emergency protection. If it burns out, the circuit will also be broken. Checking these elements is similar to checking the heating element: in a cold state, the sensor and fuse should “ring” (show almost zero resistance), and when heated (for the sensor) they should open the circuit. A malfunction of any of these elements requires replacement, since they are consumables.
It is also worth checking the integrity of the wiring. Vibration of the compressor and cycles of expansion-compression of materials over time can lead to fracture of wires inside the insulation or oxidation of contacts in connectors. Carefully inspect the wiring harnesses for scuffs and traces of rodents, which often settle in warm niches of equipment.
⚠️ Attention: Technical characteristics and location of elements may vary slightly depending on the year of manufacture and the specific modification of the Samsung refrigerator. Always check the diagram pasted inside the case, if it is preserved.
Replacing the heating element and assembling the refrigerator
If diagnostics confirmed a malfunction of the heater, it must be replaced. The new element is installed in the reverse order. Make sure that the heating element fits tightly in its grooves and does not touch plastic parts that may melt during operation. When connecting the wires, make sure the contacts are secure - they should not dangle.
After installing the new part, assemble everything in the reverse order: install the back panel, secure the shelves and drawers. Before turning on the refrigerator, check again to see if there are any unnecessary parts or tools left inside. Turn on the unit and observe the first cycle of operation. After a few hours (or after the first defrost cycle, if the model allows you to initiate it manually through the service menu), check whether water has begun to drain into the drain.
Regular maintenance, such as defrosting (if the model requires it) and cleaning the drainage hole will help extend the life of the new heating element. Do not overload the refrigerator with products that cover the ventilation holes to ensure uniform air circulation and proper operation of the system No Frost.
Frequently asked questions (FAQ)
Is it possible to operate a refrigerator with a faulty heating element?
Short term - yes, but this will lead to overgrowing of the evaporator with ice, deterioration of cooling and possible breakdown of the compressor due to overload. In addition, water can flow onto the floor, damaging the coating.
Why does the heating element burn out in a Samsung refrigerator?
The main reasons: natural wear of the nichrome spiral, power surges, corrosion due to moisture, as well as faulty sensors, due to which the heater runs for too long or does not turn off on time.
How often should the heating element be changed?
The service life of the heating element is usually 5-10 years. However, if there are frequent power surges or wiring problems, it may fail sooner. It does not require scheduled replacement, only after a breakdown.
Is it possible to use a heating element from another refrigerator model?
It is advisable to use an original spare part or a complete analogue with the same geometric dimensions and resistance. Installing an unsuitable element can lead to incorrect operation of the defrost system or even a fire.