Question about Televison & Video
10 yrs old
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Posted on Jan 02, 2017
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The evaporator coil behind the cover on the back wall inside the freezer will ice up under normal conditions. Every 8 to 10 hours for around 20 minutes the defrost timer (or in most newer models the electronic adaptive defrost control) will turn the defrost heater on to melt the built up ice. There is a defrost thermostat which prevents the heater from overheating the freezer by breaking the heater circuit when the temp reaches close to 32 degrees F. The entire cooling system shuts off during the defrost cycle and starts back when the timer advances through the cycle.
If this ice is not melted it will continue to build up until the air can’t flow over the coil to circulate the cold air through the freezer and into the fridge. The temperature change in the fridge is usually noticed first followed by the freezer.
If the defrost thermostat is bad, it can prevent the heater from coming on OR it won’t turn the heater off when it gets too warm. It is clamped to the evaporator coil at the top to sense the temp. If it appears to be misshapen it is bad.
With an ohm meter it should show continuity when cold and none when warm.
You can also bypass(disconnect the two wires plugged into it and twist them together) the thermostat to see if the heater comes on then. If it does then you know the thermostat is bad and needs replaced.
The defrost heater is located on the evaporator. It is in a tube which is at the bottom and can also go up the sides of the evaporator. On some types you can see a burnt spot if it’s bad. With an ohm meter it should show continuity from end to end when disconnected from the wiring in the freezer. You can also test the wiring for voltage when it’s in the defrost mode.
If you have a defrost timer you can test it. It can be located under the fridge behind the kick panel on the front. Some are in the fridge with the controls at the top. You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer because that means the timer is not running. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.
If you have an adaptive defrost control instead of a timer, replace it if the heater and thermostat test good. It is located in the fridge with the controls in some models and on the back in others. You can post your model number into one of several appliance parts sites on the internet and search for defrost components to find your parts.
Posted on Jan 21, 2010
Here are some suggestions: First of all . Do you have an anti virus installed on your husband's machine ? Viruses can slow the machine and even kill it permanently ( so be careful) . Just install an anti virus and you'll solve the problem . If you are already have an anti virus , then just run a full system scan and watch what will happen and follow the recommended steps that will be given by the anti virus [ There are a lot of anti virus softwares in the market ] but if you suspect that your system is already infected i recommend you to use (Avast professional edition) because it can make a boot scan , that means after you install it , it will ask you if you want to make a boot scan , just agree with it and it will reboot the system and start a boot time scanning , meanwhile you should watch it and give it the right orders if it detected a virus infection .
Here is another suggestion : There is a certain software you could install it . This software can help your machine and detect any problem on your husband's computer but viruses . this software is called (TuneUp utilities) . You can download it from here www.tune-up.com . just try it and you'll be satisfied with result .
if that didn't help just contact me again and i'll help you as possible as i can .
good luck .
Posted on Jan 29, 2010
if you have the settings correct then the cold control(ref setting) is bad. but some older models use a baffling system which confuse some people. the freezer settind turned to the lowest setting make you fridge colder. when you put the freezer on the highest setting it allows less airflow. which in turn keeps ref warmer.
Posted on Aug 01, 2010
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