Question about Refrigerators
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Posted on Jan 02, 2017
SOURCE: frost free fridge not cooling
If the fan is running you more than likely have a defrost problem.
look at the back wall of the freezer section if it is frosted up. it's not defrosting.
There three components in this system. The defrost heater, the defrost termination stat., and the defrost timer. Newer refrigerators do not have a timer per say it is build into a electronic board usually mounted on the back of the refrigerator under a metal plate. The termination stat is the cheapest part @ $ 25.00. The heater should run @ 50.00 to 70.00. The board could be as much as 200.00 or more. If the refrigerator is over 10 years old you may wish to look into getting a replacement. Appliances are designed to start failing after 10 years old.
If you unplug the refrigerator let it defrost then plug it back in. it will work properly about 3 days before it frosts back up.
Posted on May 17, 2008
Either the repair guy did not wire up the heater correctly or he replaced the wrong part, if the heater was good it was likley to be the defrost thermostat...I would call the repair guy back to check.
Posted on Jun 23, 2009
Hi, With the information you supplied I’m going to assume there is an ice build up at the rear of the freezer. Your problem is going to be with your defrost system. I will also assume you have the ability to repair this yourself.
This is going to be one of three problems with your refrigerator, 1st thing to do is remove shelf’s and panel in the back of the Freezer. You may see ice build up on the evaporator, don't worry get a hair dryer and melt the ice.
Next locate the wires for the defrost heater and using a multi-meter/ohms meter test the heater for continuity (it should read infinite) if the defrost heater is bad replace it.
This is what a typical defrost heater looks like:
If the heater is good test the defrost thermostat. This should normally be done when the evaporator is still covered with ice since it will only activate at 40f - 50f depending on the thermostat. When tested with the ohms meter at below 40f it will read infinite. It is normally clipped to the upper right of the evaporator and look something like this:
The next possible problem could be the defrost timer. If you have tested the heater and thermostat and they have tested good next find the defrost timer, If your refrigerator has a mechanical one it will either be located inside the control panel in the fridge or behind the panel below the doors. Once you have located it advance the dial until you hear a click. This will initiate the defrost cycle. If your heater begins to get hot this will tell you that your timer has stalled and needs to be replaced. A typical mechanical timer looks like this:
If your refrigerator has a digital defrost timer you should locate the tech sheet. Normally you can find this behind the panel under the doors. It will tell you how to initiate a manual defrost cycle. As before if the heater gets hot you will have to replace the mother board normally located behind a panel at the rear of your refrigerator.
If your fridge is warm and there is no build up of frost/ice on the back panel inside the freezer then you problem is most likely going to be the evaporator fan, have you heard the fan running in the past few hours? if you are not sure pull the panel out to where you can see fan and watch it over the space of an hour to see if it turns. If you don’t see it turning replace the motor. This is what a typical evaporator fan looks like:
Hope this helps. If you have any other questions please feel free to comment again. If you decide to get a repair guy in should not cost you any more then $120 - $200 depending on make/model/problem Good luck & thanks for using Fixya! Mike
Posted on Oct 17, 2009
Testimonial: "UNFORTUNETLY THIS DID NOT PERTAIN TO MY MODEL SO I COULD NOT USE THE INFORMATION"
you have a defrost problem, could be bad adaptive defrost board,t-stat heater,when you open freezer door listen for fan if fan is blowing check the t-stat,look at it and see if it has a buldge on it,sometime you can see this and tell it's bad,you'll need a meter to read out the heater and other parts to see whats bad,might be a good idea to call a tech to do this,when you find problem you have to melt everything out again
Posted on Oct 31, 2009
Is the Compressor Running? Put your hand on compressor and see if you feel a vibration or if it is cold or hot. On the side there is a start relay. Remove that and shake it. If it rattles then it is bad. Replace and you will be running again. If compressor is running then most likely compressor is bad. Check frost pattern on the evaporator in the freezer section. If it appears that compressor is running and the evaporator is a little cold and maybe even has a little frost on the top of it then compressor is insufficient,
Posted on May 15, 2010
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