Question about Refrigerators
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Posted on Jan 02, 2017
SOURCE: Freezer Troubles
Skap, the question is whether the evaporator coils are completely frosted up or just the top section. Frigidaire has had a lot of issues with restrictions which would cause just freezing on the top half. I will attach some pictures. Your unit has an adaptive defrost. I believe that you can advance it into defrost by pressing the light switch 5 or 6 times. If you pull the bottom grill, there should be a tech sheet with the instructions behind it. Usually when this adaptive defrost unit fails, you will not have a freezer fan, for it runs through this adaptive defrost board. Your heaters are calrod and usually do not fail. They can become unplugged due to ice build-up. You can check to see if you have 120V getting to them after putting the unit into defrost. If not, check the defrost thermostat (bi-metal). If it's bulged, it's usually a bad sign. Defrost the unit with a hair dryer while unplugged. You have to remove the back freezer panel to get at the bi-metal, defrost the unit and check the drain pan.
Posted on Sep 11, 2006
Could be that, or it could be the temperature sensor on the evaporator - if that goes, then as soon as the freezer starts a defrost cycle, it will think it's got the evaporator hot enough and will start cooling again.
Suggest you let the freezer thaw out then, with a voltmeter connected across the terminals on the board which connect to the sensor, turn the freezer on and see if the sensor reacts sensibly to the evaporator cooling down. It's usually done with a thermistor, but just for the moment, I can't remember whether it's usually a PTC or an NTC.
That way, if it is the sensor, you'll be spared the expense of replacing a serviceable pcb.
Posted on Apr 13, 2008
check the defrost bimatal or defrost thermanstat it will be located on the evaperator suction line (large line) it should read continuity with the ref cold if it showes continuity then the defrost timer is the problem
Posted on Apr 13, 2008
Defrosters are commonly controlled by a primitive timer and this may have a 'dry' and a 'wet' (humid) climate setting that will cause the defroster to cycle generally every 12 or 24 hours.
If set wrong (by accident or on purpose), it can allow too much frost to accumulate before attempting to defrost.
This can cause a gradual buildup of ice.
Also the heating element for the freezer may have failed open so it never heats at all. The connections that need to be checked are often buried between the in- and outside walls.
The timer is probably still OK since you apparently aren't having a problem on the refrigerator side.
Posted on Jun 10, 2008
SOURCE: evaporator coil iceing
if you can put the frig. in defrost this will tell the sensor to turn on and you will see the heater melting the ice,if you can't put it in defrost and the sensor still has ice on it,simply put it in your hand,as your hand warms up you should feel the sensor pop,this pop tells the heater to turn off,if no pop the sensor is bad,if no ice on the sensor put it in a glass of ice,chill it down and do the same hand test,you can also use an omhs meter to check it,all the sensor does is open and close,let me know what you find-mike
Posted on Oct 30, 2008
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