You have discovered that your refrigerator does not defrost. Now what? When you have a refrigerator freezer that does not defrost properly, there are some troubleshooting items to check. Leaving a freezer that does not defrost for a long time can create a bigger problem.
When ice builds up inside your freezer or there are uneven temperatures, the refrigerator defroster may not be working. An imbalance in the temperature of the refrigerator is caused by the malfunction of the refrigerator defroster. This can be caused by many things. Do you want an experienced technician to check the problem, contact Whirlpool Refrigerator Repair Service Center nearby you.
Below are some of the most common causes for a refrigerator not to defrost.
The defrost cycle managed by the control board. The board determines how often the defrost cycle should run.
If the plate is defective, the defrost cycle will never start. However, before jumping to replace the control board, your best option is to test the defrost heater and defrost thermostat to see if there is a simple solution. If both the defrost heater and the defrost thermostat are fine, then it may be necessary to replace the defrost control board.
When this breaks, the defrosting cycles of the refrigerator cease and become unbalanced. It can cause unusual much of the frost on the walls of the freezer. First, disconnect the refrigerator and disconnect the defrost heater wires. The defrost heater is behind the rear access panel inside the refrigerator / freezer, under the evaporator coil. Next step, take a digital multimeter and use it to test the ohms. Place the probes on the heater terminals, one for each. The good number is between 10 and 150 ohms. If you have a thermostat, make sure it is cold before testing.
The defrost thermostat tracks the temperature of the evaporator coils in your freezer. While defrosting will turn on automatically in most cases, the thermostat helps to assist in the process of when it should turn on and when it should turn off. However, if it has failed, it will prevent the defrosting heater from turning on, which completely stops the process. The thermostat shows no special symptoms when it malfunctions, but you can test its continuity with a multimeter to find faults. It is a small part, but even small malfunction can have important effects.
The defrost timer activates the defrost heater frequently throughout the day to ensure that the evaporator coils are free of frost.
If the defrost timer does not work properly, it may not turn on the defrost heater or advance to the defrost cycle. During the defrost cycle, heater should turn on and compressor should turn off. You can check if this is happening by manually turning the dial to the defrost cycle. If the timer does not activate the defrost components or does not complete the defrost cycle within 30 minutes, this indicates that the defrost timer is not advancing and therefore must be replaced.
If your refrigerator is too hot or cold, it could be because the fuse of the defrost sensor has blown. This is another failsafe. If the defrost sensor does not record that the system is getting too hot, the heater will not turn off. To prevent additional heat from becoming a problem, the sensor has a fuse that burns. When the fuse blows, the defrost heater power is cut off. The defrost sensor has only one fuse. If fuse blows, the defrost sensor is broken and it must be replaced. Both the sensor and the fuse can be tested with a DMM.
After trying all the above causes if you think you are unable to solve the problem, you can contact Haier Refrigerator Repair Service Center in Hyderabad or Bangalore. We at Doorstep Hub Providing all types of refrigerator repairs at your Doorstep.