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Thermostat Where is the defrost thermostat located on this unit? Thnx

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Defrost thermostat is connected to the freezer cooling coil. In the freezer you may have to remove the shelves and then the back wall to access it.

Posted on May 23, 2008

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Ice buildup on back of freezer and noisy fan


The noisy fan could be caused by the ice build up, but you will need to defrost your unit to find out if that is your case. Your unit has a defrost circuit, which is made up of a defrost heater (P/N 5300JB1100J); a defrost thermostat (P/N 6615JB2005C) that are both located in the freezer section close to the evaporator coils. And a timing cicuit located on the control board (P/N: EBR41531303). The heater and thermostat can be checked with an ohm meter (8-100 ohms normal) but the timing circuit can not, so you have to check the heater and thermostat first.Hope this helps!
Hal aka ImJustAvg

Jan 07, 2012 | LG Refrigerators

1 Answer

Freezer is not defrosting properly , I already change the thermostat, my refigerator model is TBX74UL01 OR TBX74UB01.


If the thermostat is replaced, but still its not defrosting, then two possibilities, either weak defrost heater,Heater is the part which heats and it defrosts, if the heater gets weak, then unit will not defrost properly.And it will take more time to defrost, and till that time, again frost gets collected.---------- But if defrost heater is ok, then problem is defrost board.The defrost board is the part, which controls both thermostat and defrost heater.-----------
This problem is called defrost problem.-------------

So first thing you try is , perform, manual defrost reset procedure.---------

The manual defrost reset 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. Then check,if same frost is getting collected, then its defrost problem,. If it's again building up ice that means the unit is not defrosting. It's starting the cooling procedure, and then while defrosting, it's not working. 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. IN YOUR case, defrost thermostat is already got replaced, so ignore thermostat, but other two possibilities needs to be checked.----------You can get required parts from from online sites like: --- www.repairclinic.com or from searspartsdirect online site. --------- This should help.Thanks.Helpmech.

Sep 19, 2011 | GE Refrigerators

1 Answer

Freezer ices up on back wall and dosen't stay cold .stops making ice and refrigerator starts to warm up. If I unplug deice unit it works fine for two or thee months befor it freezes back up and...


If your unit is frost free, then you have a defrost circuit failure, which is made up of the defrost heater, defrost thermostat and defrost timer. The defrost heater and defrost thermostat are located in the freezer compartment next to the evaporator coil and can be checked with an ohmmeter (anything except an open is good). The defrost timer is usually located in the free food side or in the compressor compartment.

Suggest you go to the www.searspartsdirect.com website and insert the model number off the equipment id tag on your unit and find the parts.

Aug 16, 2011 | Refrigerators

1 Answer

The freezer retains frost and obstructes the fan.


Defrost cycling is poor.
Locating the defrost timer hiddenbehind the back bottom corners of the fridge at the bottom, in some units it's located in the ceiling of the fresh food section,and some behind the cold control cover. Once you locate the defrost timer,slowly turn the screw like wheel in the middle of the defrost timer with astraight screwdriver until the fridge shuts off. You are now in defrost. If thedefrost heater(s) comes on now, replace the defrost timer and defrostthermostat. If the heater(s) does not come on, you can ohm test the defrostheater for continuity or volt test for 120 volts to the heater(s). If you haveno power to the defrost heater(s) you can also bypass the defrost thermostat tosee if the defrost heater will come on, join the 2 wires together to bypass thedefrost thermostat. If the heater now comes on, replace the defrost timer anddefrost thermostat. If the heater itself is bad, defrost the fridge with a hairdryer, replace the defrost heater* and defrost thermostat. If the defrost timerseems "hot" to the touch or is noisy ( like a ticking or screechingnoise )...replace it. Once defrost cycling is cleared, you will get better cooling in fridge compartment also. Thanks.

Jan 31, 2011 | Whirlpool Refrigerators

1 Answer

Not cooling


If your freezer is not cooling, i will suggest you check the defrost thermostat. To test the defrost thermostat, please follow the steps below:
  1. Locate your refrigerator's defrost thermostat. In freezer-on-top models, it may be located under the floor of the unit, or it could be found at the back of the freezer. If you have a side-by-side refrigerator, the defrost thermostat is found at the back of the freezer side. The thermostat is wired in series with the defrost heater, and when the thermostat opens, the heater shuts off. You will have to remove any objects that are in your way such as the contents of the freezer, freezer shelves, icemaker parts, and the inside rear, back, or bottom panel.
  2. The panel you need to remove may be held in place with either retainer clips or screws. Remove the screws or use a screwdriver to release the clips holding the panel in place. Some older refrigerators may require that you remove a plastic molding before you can gain access to the freezer floor. Exercise caution when removing the molding, as it does break fairly easily. You could try warming it with a warm, wet towel first.
  3. There are two wires leading from the thermostat. They are attached to terminals with slip-on connectors. Gently pull on the connectors to release the wires from the terminals. You may need to use needle nosed pliers to help you. Do not pull on the wires themselves.
  4. Proceed to remove the thermostat. It may be secured in place with a screw, clip, or clamp. The thermostat and the clamp on some models are one assembly. On other models, the thermostat clamps around the evaporator tubing. In some other cases, the thermostat is removed by squeezing in on the clip and pulling the thermostat up.
  5. Set your multitester to the R X 1 ohms setting. Place each of the multitester's leads on a thermostat wire. When your thermostat is cold, it should produce a reading of zero on your multitester. If it is warm (anywhere from forty to ninety degrees Fahrenheit), then this test should produce a reading of infinity. If the results you receive from your test differ from the ones presented here, then you will need to replace your defrost thermostat.
To replace the defrost thermostat, please follow the steps below:
  1. Locate your refrigerator's defrost thermostat. In freezer-on-top models, it may be located under the floor of the unit, or it could be found at the back of the freezer. If you have a side-by-side refrigerator, the defrost thermostat is found at the back of the freezer side. The thermostat is wired in series with the defrost heater, and when the thermostat opens, the heater shuts off. You will have to remove any objects that are in your way such as the contents of the freezer, freezer shelves, icemaker parts, and the inside rear, back, or bottom panel.
  2. The panel you need to remove may be held in place with either retainer clips or screws. Remove the screws or use a screwdriver to release the clips holding the panel in place. Some older refrigerators may require that you remove a plastic molding before you can gain access to the freezer floor. Exercise caution when removing the molding, as it does break fairly easily. You could try warming it with a warm, wet towel first.
  3. There are two wires leading from the thermostat. They are attached to terminals with slip-on connectors. Gently pull on the connectors to release the wires from the terminals. You may need to use needle nosed pliers to help you. Do not pull on the wires themselves.
  4. Proceed to remove the thermostat. It may be secured in place with a screw, clip, or clamp. The thermostat and the clamp on some models are one assembly. On other models, the thermostat clamps around the evaporator tubing. In some other cases, the thermostat is removed by squeezing in on the clip and pulling the thermostat up.
  5. To install your new defrost thermostat, reverse the removal process. Reconnect the wires, replace the panel, and restore power to your refrigerator. For those models where the defrost thermostat is attached to the evaporator coil, make sure you install the new thermostat in the same location and position of the old one.

Hope this information helped. Thank you for using fixya

Jan 16, 2011 | Thetford Norcold RV Cooler/Freezer

2 Answers

Food compartment not cooling, but freezer is? unit is very old side be side G E


sounds like the defrost heater is open and cant defrost the evaporator and it has iced over and now cold air cant circulate in the unit,its located behind a panel located inside the freezer compartment,defrost the coil with a hair dryer or by shutting off the unit and letting it melt naturally,then check the heater for continuity,also if this heater is good,then test the defrost thermostat located near the top of the evaporator coil too

Jul 29, 2010 | GE (PSS26MSRSS) Side by Side Refrigerator

2 Answers

Fridge and Freezer Not getting Cold


Your defrost system is at fault.
With this brand it is most likely the defrost thermostat and defrost heater located behind the back freezer panel.
Remove the shelves and bin,then remove the freezer panel. Defrost the ice manually.
Replace the thermostat and heater assembly.

Apr 27, 2010 | GE (PSS26MSRSS) Side by Side Refrigerator

1 Answer

My Amana ABB2524HEW quit defrosting. I have manually defrosted the unit and unit is cooling fine. I can manually defrost ok with the digital control. I did Service Test 1 and the defrost thermostat showed...


Good day,
If the machine has been running at least 6 hours in cooling mode, and the thermostat shows open. It is defective, and needs replaced.
It is located in the freezer section behind the back panel, and is located on the top of the cooling coil.
Hope that helps.

Thanks for using FixYa

Jan 25, 2010 | Refrigerators

2 Answers

I would like to receive advice plus sketch etc. for the THERMOSTAT layout - location and Part Number of Fisher & Paykel Refrigerator Model CN405TGWHWH Serial Number: N151258


Hi

Thanks for using FixYa. Before you begin to replace your defrost thermostat, makesure you disconnect the appliance's power supply. The easiest way to do this isto unplug the unit from the wall. Alternatively, you could trip the appropriateswitch in the circuit breaker panel, or you could remove the appropriate fusefrom your home's fuse box.

Please check your refrigerator's defrost thermostat in this picture--

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Click on the image to zoom in. It is located under the floor of the unit. The thermostat is wired in series with the defrost heater, and when thethermostat opens, the heater shuts off.

The cover plate over the coils needs to be removed. Now remove the freezer door, and then the screws so that each side of outer fridgecover is detached. This will to enable cover plate to slide out. (Outer walls have to be pried out alittle). Defrost thermostat is located behind coils.

Also check the Defrost Timer which is located at bottom offridge frame next to compressor. A couple of screws and unplug and plug in new part. There are two wires leading from the thermostat. They areattached to terminals with slip-on connectors. Gently pull on the connectors torelease the wires from the terminals. You may need to use needle nosed pliersto help you. Do not pull on the wires themselves.




Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks

Rylee

Sep 27, 2009 | Refrigerators

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