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Freezer not getting cold on frigidaire top mount refrigerator model FRT21LR7A.

And can't locate the thermastat, defrost timer heater etc.controls. What do they look like and what area are they located in? Are any manuals, diagrams, pictures etc. available for a novice? Thanks

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  • Anonymous Jan 17, 2009

    I am having the same problem! The Model number is PLHT219SCK4. I cannot locate any of the items mentioned.

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  • Master
  • 828 Answers

If you give the make and model number someone may be able to direct you to a place that will have it.

Posted on May 23, 2008

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Does the control thermastat have anything to do with the freezer on my refrigerator getting cold but not freezing


If you remove the evaporator cover and look at the frost on the evaporator is it fairly even frost from top to bottom? If you don't have frost on the bottom half of your evaporator then you have a freon leak. Do you have a model number for your unit?

Mar 15, 2013 | Whirlpool Refrigerators

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Ice In Freezer Vents


thick frost on the back wall indicates a defrost problem, either with the defrost control, the heater, or the bimetal thermostat. Without personal inspection, i cant tell you which one it is, but i can narrow it down to those three

Mar 01, 2010 | Frigidaire FRT21H7AS Top Freezer...

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Refrigerator is in garage, the freezer is not keeping things frozen.


If it's not a standard defrost issue it could be the temp in th garage-Your cold control is monitoring the temperature of the refrigerator section and is designed to turn off the compressor to keep things from freezing in that section. If it stays cold long enough outside in your garage the cold control thinks its cold enough and won't turn the compressor on. A makeshift closet to hold a little heat the unit generates will probably help.

If your compressor is running and it's still not cold enough. 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 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.

Dec 20, 2009 | Frigidaire FRT21HS6D Top Freezer...

2 Answers

I have a 7 year old GE refrigerator (top mounted freezer) that seems to stay in defrost too long-- everything in the freezer defrosts, the ice cubes start to melt, the ice cream gets soft, etc. Food in the...


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 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.

Nov 06, 2009 | GE J Series 18.2 cu. ft. Top Freezer...

2 Answers

Refrigerator doesn't work but the top freezer does.


How to check stuff>
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php

How to check everything
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php


The fridge gets its cold air from the freezer through a vent(damper) between the freezer and fridge.The fan in the freezer blows air through it. There is a flap you adjust with the fridge temp. control. Make sure it's opening and closing when you adjust the fridge temp

..
If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

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. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.


Sep 10, 2009 | Refrigerators

1 Answer

EVERYTHING WORKS FOR ABOUT A MONTH AND THEN THE FREEZER HAS A BLOCK OF ICE ANT THE BACK AND THE BOTTOM BECOMES WARM


How to check everything
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php


If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

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. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.


Aug 27, 2009 | Frigidaire FRT21H8 Top Freezer...

1 Answer

My bottom fridge is not getting cold but my top freezer works


The air circulation is neede to prevent this Make sure it's the freezer fan you hear running.

The fridge gets its cold air from the freezer through a vent(damper)between the freezer and fridge.The fan in the freezer blows air throughit. There is a flap you adjust with thefridge temp. control. Make sure it's opening and closing when you adjust thefridge temp ..
If the evaporator coils behind the back panel of the freezerare icing up because of auto defrost failure that will stop the circulation ofcold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat. Inmost newer models the timer has been replaced by an electronic control board.If the heater and thermostat are ok it’ll be the control.

You can turn the defrost timer till it clicksand everything shuts down. The heater should now come on. If it does, replacethe timer. If it doesn't, check the heater and defrost thermostat. Turn thetimer again till everything starts back up to end the defrost cycle.



How to check stuff>
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php


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1 Answer

Freezer not getting cold enough


it would sound like you ether have a defrost problem . or a drain heater problem or posibly even a short refrigerant problem / if you can identify the location of the defrost timer located on the underside of the compartment divider unless im mistaken with this modle . you can manually put the fridge into a defrost. listen close to the freezer and see if you can hear ice water sizeling on a heater in about 5 or 10 minutes. if yes then you know the heater is working and you replace the timer. if no then alow the timer to come out of defrost on its own. if it does then the time is running ok and youll have to look for a nothe problem. the other two problems would have to be exposed by a pro. if it is a refrigerant shortage this is normally under 5 or 7 year woranty . chck you lables or woraty info on line. hope this was helpfull

Oct 20, 2008 | Frigidaire Gallery Series GLRT86TEK 30"...

1 Answer

Frosting up


it is behind the rear cover in the freezer section, you need to remove the freezer shelfs and bins, you will see the screws on the back panel (remove frost from panel) remove the screws and the heater will be a black element that is mounted on the evaperator it will be shaped like a u each end will have a wire connected to it with no power to the machine dissconnect the wires to the heater and with an ohm meter check for resistance if it has resistance then it is good there is a defrost thermastat mounted on the suction line at the top of the evamerator with it still cold and frozen with the meter check this thermastat it should read resistance

if either of these two parts shoul no resistance the one that does not is bad
if both show resistance then the defrost timer is the problem

May 02, 2008 | Whirlpool GS6NBEXR Side by Side...

1 Answer

Cold freezer/warm refrigerator


Same problem with Frigidaire Gallery model#GLRT182SAW5 (dated 2002 on back of case)

Vents were blocked with ice. Vents (from top compartment to lower) located behind light. You can check by poking a chopstick up the (2) holes; be careful not to hit fan blades.

Solution:

- took freezer coil cover off in back; checked that defrost heater element was working (marked and rotated the timer in the hole next to light); checked that fan working. Found ice in the vents and defrost drip area. Got it out with hair dryer.

- cleaned compressor coils in back (check fan is rotating; also tweaked some of the compressor tubing bends to make them more smooth - read somewhere about a manufacturing defect ...); blew out drip tube from defroster while down there.

- Set the freezer control to WARM and the refrig control to COLD (THIS SHOULD IMPROVE AIR FLOW FROM TOP TO BOTTOM).

- Put thermometers in top and bottom. Checked that refrigerator cycles (not running continuously). Checked that cold air is coming down from (2) vents behind light.

OK: so far, so good. Lower compartment is 40 or under. Top is under 18.

CONCLUSION: Suspect marginal design. Had problems with another similar model where defroster ice doesn't drain correctly, pools and refreezes. Leading to blocked vents as well as blocked defroster drain and similar problem including dripping water from top to bottom and warm bottom.

MAYBE KEEPING THE FREEZER CONTROL AT WARM GETS AROUND THE PROBLEM?? ANYWAY, ITS WORKING FOR ME FOR NOW !!

Nov 12, 2007 | Frigidaire Refrigerators

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