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How do I test the defrost thermostat?

Defrost thermostat is in freezer comp. Defrost function is inop.

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Defrost thermostat is a temp control. To test it, it would need to be in ice water. When cold it is a closed switch or contacts (checked with a multimeter. When it gets above 50--55 degrees it will open the contacts. Another way, unplug refrigerator----safely hook a jumper wire across the thermostat leads by passing the thermostat and then put the refrigerator in defrost. If heater comes on the thermostat is probably bad. If still no defrost--- you may have burned out heaters. Once done testing this way make sure you remove jumper and tape all wires for a safe connection.

Posted on May 01, 2015

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Freezer works refrigerator is warm


If the freezer is getting cold and working properly, but fridge section is not getting cold, then it can be defrost issue.------------------ The procedure of this unit is as follows: --- The compressor starts then it cools the freezer section. When the freezer reaches its cooling level the defrost cycle starts functioning. In this cycle the fan in the freezer section starts running and the cool air in the freezer section is passed to the fridge section and the fridge section gets cold. The air from freezer to refrigerator passes from the section, in that section the damper is located.--------- Try manual defrost reset procedure: ---- First unplug the unit from main power outlet. Then empty whole unit completely. Then keep both the doors open. Wait for 24 hours. All the ice collected on the coils and in the freezer section will get melted. Clean the water from the sections. Then Connect the power cord of the unit to main power outlet after 24 hours/.Then set the temperature to normal in both fridge and freezer section. It will take near to 4 hours to get run in its proper cooling cycle. Then check, if the problem returns again. If the same problem occurs then it's defrost problem. The defrost board and the defrost thermostat/heater is not functioning properly and it has to be checked and replaced. The defrost assembly consists of three main parts. The defrost thermostat, the defrost heater and defrost board. Any of the one is not functioning. When thermostat sense the maximum cooling, it triggers the defrost heater to start heating and this defrosts the ice collected on the coils and the system works. Both thermostat and heater are controlled by defrost board. First the thermostat and defrost heater to be checked, if both check ok by meter and visually, then its defrost board causing the problem. You can get required parts from online sites like: --- www.repairclinic.com or from searspartsdirect online site.This should help.Thanks.Helpmech.

Apr 28, 2011 | Amana Easy Reach 20.5 cu. ft. Bottom...

1 Answer

Refridgerator part of Miele fridge / freezer is not getting cold at all. Freezer part is workng fine with no issues. Have tried to reset but with no luck. Would like to know what the problem may be if...


It can be defrost issue.

Try manual defrost reset procedure: ----
First unplug the unit from main power outlet. Then empty whole unit completely. Then keep both the doors open. Wait for 24 hours. All the ice collected on the coils and in the freezer section will get melted. Clean the water from the sections. Then Connect the power cord of the unit to main power outlet after 24 hours/.Then set the temperature to normal in both fridge and freezer section. It will take near to 4 hours to get run in its proper cooling cycle. Then check, if the problem returns again. If the same problem occurs then it's defrost problem. The defrost board and the defrost thermostat/heater is not functioning properly and it has to be checked and replaced. The defrost assembly consists of three main parts. The defrost thermostat, the defrost heater and defrost board. Any of the one is not functioning. When thermostat sense the maximum cooling, it triggers the defrost heater to start heating and this defrosts the ice collected on the coils and the system works. Both thermostat and heater are controlled by defrost board. First the thermostat and defrost heater to be checked, if both check ok by meter and visually, then its defrost board causing the problem. You can get required parts from online sites like: --- www.repairclinic.com or from searspartsdirect online site.This should help.Thanks.Helpmech.


Apr 27, 2011 | Miele Refrigerators

1 Answer

THe fridge on our fridge freezer isnt working


If the freezer is getting cold and working properly, but freezer is not the it can be defrost issue.------------------ The procedure of this unit is as follows: --- The compressor starts then it cools the freezer section. When the freezer reaches its cooling level the defrost cycle starts functioning. In this cycle the fan in the freezer section starts running and the cool air in the freezer section is passed to the fridge section and the fridge section gets cold. The air from freezer to refrigerator passes from the section, in that section the damper is located.--------- Try manual defrost reset procedure: ----
First unplug the unit from main power outlet. Then empty whole unit completely. Then keep both the doors open. Wait for 24 hours. All the ice collected on the coils and in the freezer section will get melted. Clean the water from the sections. Then Connect the power cord of the unit to main power outlet after 24 hours/.Then set the temperature to normal in both fridge and freezer section. It will take near to 4 hours to get run in its proper cooling cycle. Then check, if the problem returns again. If the same problem occurs then it's defrost problem. The defrost board and the defrost thermostat/heater is not functioning properly and it has to be checked and replaced. The defrost assembly consists of three main parts. The defrost thermostat, the defrost heater and defrost board. Any of the one is not functioning. When thermostat sense the maximum cooling, it triggers the defrost heater to start heating and this defrosts the ice collected on the coils and the system works. Both thermostat and heater are controlled by defrost board. First the thermostat and defrost heater to be checked, if both check ok by meter and visually, then its defrost board causing the problem. You can get required parts from online sites like: --- www.repairclinic.com or from searspartsdirect online site.This should help.Thanks.Helpmech.

Apr 27, 2011 | Refrigerators

1 Answer

I hava a 2 door fridge, the front of the freezer has a little ice and the bottom really is not getting cold


It can be defrost issue.First try manual defrost reset procedure. The procedure is as follows: ----
First unplug the unit from main power outlet. Then empty whole unit completely. Then keep both the doors open. Wait for 24 hours. All the ice collected on the coils and in the freezer section will get melted. Clean the water from the sections. Then Connect the power cord of the unit to main power outlet after 24 hours/.Then set the temperature to normal in both fridge and freezer section. It will take near to 4 hours to get run in its proper cooling cycle. Then check, if the problem returns again. Then its defrost board problem. -------------The procedure of this unit is as follows: --- The compressor starts then it cools the freezer section. When the freezer reaches its cooling level the defrost cycle starts functioning. In this cycle the fan in the freezer section starts running and the cool air in the freezer section is passed to the fridge section and the fridge section gets cold. The air from freezer to refrigerator passes from the section, in that section the damper is located.----------- The defrost assembly consists of three main parts. The defrost thermostat, the defrost heater and defrost board. Any of the one is not functioning. When thermostat sense the maximum cooling, it triggers the defrost heater to start heating and this defrosts the ice collected on the coils and the system works. Both thermostat and heater are controlled by defrost board. First the thermostat and defrost heater to be checked, if both check ok by meter and visually, then its defrost board causing the problem. You can get required parts from online sites like: --- www.repairclinic.com or from searspartsdirect online site.


Apr 26, 2011 | Whirlpool ET1FHTXM Top Freezer...

2 Answers

Does not go into defrost mode. refrigerator section becomes hot


The defrost is not working.This happens due to the evaporator coil in the inner section of freezer is got blocked by ice .--------

Try manual defrost reset procedure: ----

First unplug the unit from main power outlet. Then empty whole unit completely. Then keep both the doors open. Wait for 24 hours. All the ice collected on the coils and in the freezer section will get melted. Clean the water from the sections. Then Connect the power cord of the unit to main power outlet after 24 hours/.Then set the temperature to normal in both fridge and freezer section. It will take near to 4 hours to get run in its proper cooling cycle. Then check, if the problem returns again. If the same problem occurs then it's defrost problem. The defrost board and the defrost thermostat/heater is not functioning properly and it has to be checked and replaced.

--------------------

The procedure of this unit is as follows: --- The compressor starts then it cools the freezer section. When the freezer reaches its cooling level the defrost cycle starts functioning. In this cycle the fan in the freezer section starts running and the cool air in the freezer section is passed to the refrigerator section and the refrigerator section gets cold. The air from freezer to refrigerator passes from the section, in that section the damper is located. Now this problem which you mentioned. In this problem the freezer thaws, this happens if the thermostat is not functioning or the heater is not heating. Then the ice starts getting collected on the evaporator coil. The evaporator coil is at the internal section of freezer. If too much ice gets collected then this ice blocks the fan in the freezer section from functioning and this blocks the damper section with ice getting collected there. This all procedure is controlled by the defrost board of the unit.

-----------------

So first try reset procedure.If that is not helping then defrost assembly parts are to be checked and replaced.The defrost thermostat is located in the freezer section beside the evaporator coil.The defrost heater is located in the freezer section beside the evaporator coil.And the defrost control board is located in the fridge section.-------------

you can get the required parts from online sites like:---

www.repairclinic.com or from searspartsdirect online site.---------This will help.Thanks.Helpmech.

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1 Answer

AMANA SIDE BY SIDE, INOP, FREEZER COILS ICE, FAN INOP IN FREEZER. REPLACED THERMOSTAT, DEFROST TIMER AND FAN, STILL INOP. HEATER WORKS AND HAS 32 OHMS.


Check the BLUE wire from the temp control to the ORANGE wire of the defrost timer for continuity. That is the complete fan circuit. You should read the resistance of the Evap fan motor. If you do not read resistance suspect the pins of the evap fan motor connector or... the Unbilical harness from near the evap to the icemaker and the evap fan. The connector pins of the Evap fan motor connector (Freezer connector) are notorious for failing.

Thanks for choosing FixYa.

Kelly

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1 Answer

Kenmore refrig/freezer. freezer side is cold,


Check your condenser coil (should be below the refrig.). If dirty, you can clean it with a condenser brush from Home Depot or Lowe's. Turn the appliance off while cleaning. Be careful not to damage the refrigerant tubing (copper). If this doesn't solve the problem, then there may be an issue with the defrost thermostat, defrost heater(s) or the main temperature control assembly.

Contact an appliance service company.

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1 Answer

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The next step would be to unplug the refrigerator and remove the rear panel and defrost so that you can unplug the defrost heater on one end and check the continuity. 305175 Defrost Heater and defrost thermostat Part number 3489. If you change the defrost heater you should also change the defrost thermostat. Let me know the results. Remember above 60 degrees the defrost thermostat will show open with your OHM meter. Sea Breeze

http://appliancepartsse.blogspot.com/

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Aug 15, 2009 | GE Refrigerators

1 Answer

My frige in not getting cold it just started today the lights are on but its not getting cold i


Do you hear the compressor running? This is a problem with lots of possibles. Things that keep the comp from running, thermostat, defrost timer stuck in defrost, failed electrical components on comp.
If it is running the condenser fan might not be, the coils could be dirty, the light is not turning off when the door is closed (which usually results in a warm frig only, freezer is ok). Eric

Jun 11, 2009 | Kenmore Elite 22.4 cu. ft. Bottom Freezer...

1 Answer

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Something has failed in the defrost circuit-

Defrost thermostat
Defrost heater
Defrost timer

Reply back if you know how to diagnose electrical circuits, and I'll help you further.

Feb 01, 2009 | GE GSS20IEP Side by Side Refrigerator

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