What if the refrigerator doesn’t refrigerate

Creating a cozy summer home that serves as a peaceful retreat requires careful selection of appliances that enhance comfort without compromising on style or efficiency. At Appliances 4 Less Little Rock, we cater to residents in Little Rock, Benton, Conway, and Pine Bluff with an array of open box, scratch, and dented appliances that are perfect for elevating your summer living. Here’s our guide to the essential appliances for a cozy summer home.

As the core appliance of Modern Family, the refrigeration function failure of refrigerator will directly affect the safety of food preservation and the quality of life. Based on the working principle of refrigerators, the following contents systematically elaborate the common causes of refrigeration failure, and provide scientific and operational troubleshooting processes to help users establish correct fault diagnosis ideas.

（1）、the basic diagnosis of running state

1. Auditory diagnosis

The working state of the refrigeration system can be preliminarily judged by hearing. The normal operation of the refrigerator will show periodic start-stop characteristics: the compressor will produce obvious vibration sound when it starts, and maintain a uniform low-frequency noise during operation, and automatically stop when it reaches the set temperature.

2. Abnormal state analysis

If the compressor runs continuously and without intermission, it may indicate refrigerant leakage or blockage of the circulation system. If there is no running sound at all, it is necessary to focus on the power supply system and start-up control components. This stage diagnosis does not need to disassemble the equipment, through the external observation can obtain the important judgment basis.

（2）、power supply system detection method

Check the power supply

Power supply is the basic premise of equipment operation. Test should start from the socket, using an electric pen or voltmeter to confirm the socket power supply is normal.

2. Circuit state detection

For further inspection, disconnect the power supply and measure the resistance between the two poles of the refrigerator power plug. Normally, the compressor winding resistance is usually a few ohms to dozens of ohms. If the measurement indicates an open-circuit condition, it may involve compressor protector action, thermostat malfunction, or circuit disconnection.

3. Inspection of protective devices

At this point should check whether the overload protector is in the off position, the protection device is usually in the compressor temperature is too high or when the current is abnormal automatically cut off the circuit.

（3）、the compressor start-up device testing

1. Start-up system composition

Compressor start-up depends on the cooperation of the starter and the protector. The starter is usually mounted in a protective housing on the side of the compressor and its main function is to provide additional torque at the moment of start-up.

2. Starter testing steps

Test the need to disconnect the power supply, remove the starter for physical inspection: shaking should not have internal parts loose sound. Normal PTC starters should exhibit low resistance at room temperature using multimeter resistance measurements.

3. Fault diagnosis criteria

If the resistance value is abnormally high or infinite, indicating that the device failure needs to be replaced. At the same time should check with the starter supporting the protector, to ensure that its contact good contact.

（4）、component replacement and system reset

1. Preparation before replacement

After confirming the failure of the start-up component, a replacement of the exact same model should be selected. Clean the compressor terminal before installation to ensure that the contact surface is bright and free from oxidation.

2. Installation instructions

Connection should be in accordance with the original wiring order to install accurately, the terminal must be firmly in place. Once the replacement is complete, wait until the PTC element has cooled sufficiently before attempting to start.

3. Reset verification

Before reconnecting the power supply, measure the resistance of the power plug again to confirm that the circuit has returned to the normal path state. In this process must strictly abide by the electrical safety standards, to ensure that the equipment is completely power-off before operation.

（5）、operating state verification standards

1. Verification of current parameters

After restarting the equipment, systematic verification is required. First of all, through the current measurement to confirm the operating state: the use of clamp meter to measure the working current of the compressor, the normal value should be basically the same as the rated current of the nameplate.

2. Temperature change monitoring

After 10-15 minutes of operation, the hand-touch compressor exhaust pipe should feel a significant temperature rise, while the suction pipe should be kept low temperature.

Evaluation of cooling effectiveness

Open the freezer door and observe that the evaporator surface should begin to frost within 20-30 minutes and the frost layer is evenly distributed. The temperature of the cold storage room should drop significantly within 2-3 hours.

4. System stability testing

The whole verification process needs to observe 2-3 operation cycles continuously to confirm that the start-stop control and temperature fluctuation are within the normal range.

（6）、professional maintenance advice and safety specifications

Definition of the operational boundary

Household refrigerator refrigeration system involves electrical safety and refrigerant cycle, non-professional personnel should be clear about the operating boundary. The method described in this paper is applicable to the initial diagnosis of externally accessible components. in-depth maintenance involving refrigerant charging, pipeline welding, compressor replacement, etc. must be carried out by qualified professionals.

2. Guidelines for everyday use

In daily use, keep the radiator clean, avoid frequent opening the door, ensure good ventilation and other good habits, can significantly extend the service life of equipment.

3. Equipment replacement decision

When the equipment is more than 8 years old or the maintenance cost is too high, it is often more economical and safe to replace the new product with a higher energy efficiency grade.

Conclusion

Through systematic troubleshooting, users can form a scientific understanding of the refrigerator uncooling problem, handle it appropriately under the premise of ensuring safety, or provide accurate fault description to maintenance personnel when needed, so as to improve maintenance efficiency and economy. Mastering the basic fault diagnosis method can not only solve the problem in time, but also help users make reasonable maintenance or replacement decisions and realize the optimal allocation of resources.