Common Problems in a Fridge Freezer, Refrigerator Repair Serviceby Shanvi Shanu Leading Home Service providers
The refrigerator is the most commonly used home appliance in our kitchen. It keeps the food fresh for a long time by cooling them. If the freezer doesn’t work properly then it would affect a lot.
So here I would like to discuss how to diagnose a fault in a frost-free freezer or fridge freezer.
Now generally discuss most faults in fridges and freezers are very simple to diagnose and actually just involve replacing the faulty parts like the door seal or the lamp. Now they actually develop frost but you can't see that because it's concealed behind the cover in the back.
To give you a better idea of what's going on I am going to discuss briefly. Firstly remove the shelves and icebox as well as the back cover so we can see the compartments inside. Here in the back, we have an evaporator, now this is essentially a radiator that is cooled by liquefied gas being pumped through it from a compressor.
The fan at the top draws air into the appliance and then blows air across the evaporator because the evaporator is cool. It cools the evaporator the temperature and that air is then distributed around the cavity by the fan freezing anything. In some of the refrigerator model, some of the air is also ducted into the fridge compartment and the flow of that cool air is controlled by a motorized flap and it goes in through duct up at the top then travels down through the fridge and returns through this duct at the bottom.
Now when you opened the freezer door the cool air inside falls out and it's replaced by the warm moist air in the room. The moisture from the air settles on the cool evaporator where it cools so much that it turns to frost. Over time a build-up of that frost is going to affect the airflow. So for that reason, there is an element fitted underneath, the evaporator which turns on round, about every 16 hours of the motor running and for a little while heats of the frost up so that it can melt and drain away through the hole in the bottom and out to the back.
Now the most common faults that occur in a frost-free the appliance is the build-up of ice on the evaporator.
- If ice builds up then obviously it's going to affect the airflow and that means the temperature is never going to get low enough. Now the cause of that could be a faulty heater, a faulty sensor or a fuse or a fault with a control board or timer.
- Now to test the heater, you need to trace its connections to the plug and disconnect the heater from the plug and test its resistance with a multimeter. Look for the reading somewhere between two hundred and three hundred ohms. So obviously any reading outside that would indicate the presence of a fault and you need to replace the heater.
- You may also have a fault in the sensor or the fuse which is located near to the heater. Now working sensor or fuse should get a reading of a short circuit( for the fuse ) or less than a couple of ohms and again any reading was different to that would indicate the presence of a fault.
- There may be sensors around to the evaporator and for that, you should be getting a reading of anywhere between 2000 and 40,000 ohms, any reading outside of that which shows that there is a fault.
- Once you have checked all of these areas than the most likely sources that have a fault are the control board or timer and you need to get those replaced.
If you have any other issues with your refrigerator then consult the Refrigerator Repair Service center.
Created on Sep 26th 2019 02:30. Viewed 488 times.