Skip to content
Manage My Life

refridgerator not defrosting

model # RS261MDWP/XAA. Serial # JJ674GB26039422. evap freezes up wont defrost. checked sensors and element these are good. what could the problem be. Have manually defrosted twice. this last time after checking sensors and the defrost element, hooking everything back up, the blue lite on the freezer side display is blinking unit is cooling but i think this is a default setting for it to operate till service can be preformed. according to another website i saw... could this posibly be the electronic control board in the back... thanks

Sign in to answer a question
2 Answers from these members:
Manage My Life
The greatest thing since apple pie is a refrigerator that self defrosts. I can see your concern with the Samsung refrigerator and am providing a link that may be useful. An expert response on your specific model is two business days.
by Manage My Life
August 22nd, 2012
Answered in 8 minutes
0 votes
Bill W

Thank you for your question. It is concerning when the refrigerator is not functioning correctly. Samsung refrigerators are pretty straight forward to work on and have many automated test, to save you time. I will recommend you use only the forced mode to test the evaporator fan motor and the defrost heater circuit.

Some advice for you is when directions say 8-12 seconds, count one thousand one, two thousand two. In other words give it the full 8 to 12 seconds to enter the mode. The display will go blank and the refrigerator will beep

during the entire test mode until taken out of the mode.

When you get the refrigerator into the forced mode

press the FREEZER button once and only once,

This will turn on all the motors in the refrigerator. Use the diagram and a multimeter to check the voltage out to the evaporator fan.

Working with live electrical current can be very hazardous and possibly deadly. Testing voltage output requires working with electrical current. Do not attempt this measurement without the proper tools and safeguards. If you are not sure you can make these checks safely, please refer this work to a service tech.

Check on the CN75 connector the yellow to the grey. The reading should be 7-12 volts DC. Also on the CN 75 connector, check the black to the grey. There should be a volts DC reading there.

To go to the defrost heater test, press the FREEZER button once and only once. This is when already in the motor forced test and the heater will come on if the circuit is good. Measure on the CN 70 the brown to the red wire, there should be 120 volts AC. If there is 120 volts AC there and the heater is not on unplug from the wall and disconnect CN 70 from the board. Ohm out the circuit from connector CN 70, brown to orange with your meter. If you read 2600 ohms you have an open bimetal, defrost heater or themofuse.

If you read 47 or 47.5 ohms the circuit is good. If there is not 120 volt AC when measuring brown to red. Ohm out the thermistor circuit with CN 40 disconnected from the board the yellow wire, in the connector to the grey in on the CN 50 connector. Use the chart to find the resistance and compare to the temperature. Now what is the actual temperature? The thermistor is no more than a digital thermometer.

I will link you to the refrigerator on the website for parts .

Samsung Refrigerator


If you have no time to check out the refrigerator here is a link for a

Sears Home Services

technician to troubleshoot and repair the product.

I hope this is helpful. If I may be of further assistance please include more details in a reply below this entry.
by Bill W Earned 12,424 community points in Refrigerators
August 23rd, 2012
Answered in 23 hours
0 votes
Didn't find what you are looking for? Ask a question
Get up to
% off
On Refrigerators