This is Samsung service tip with part #'s for this unit hope it makes it easier
Service Tip (Local)
Refrigerator Stops Running Until Unplugged Category Home Appliances > Refrigerator > Bottom Freezer Model Code RB1844SL/XAA / RB1844SW/XAA / RB1855SL/XAA / RB1855SW/XAA / RB1855VQ/XAA / RB1944SL/XAA / RB1955SH/XAA / RB1955SW/XAA / RB1955VQ/XAA / RB2044SL/XAA / RB2044SW/XAA / RB2055BB/XAA / RB2055SL/XAA / RB2055SW/XAA / RB2155SH/XAA / RB2155SW/XAA Added by STEVEP Registered date 06.01.2008 Description
Symptom: Refrigerator stops running and cooling daily and will not run unless unit is unplugged and plugged back in.
Models Effected:RB units with 4 letter model numbers such as RB2055 / RB1944 / RB1844 etc .......
Possible Cause and Diagnostic Procedure.
- Check Both Defrost Circuits for Open Thermal Fuse.
- Access Main PCB in compressor compartment and locate CN70 connector.
- For Refrigerator compartment check for an open circuit by taking a resistance reading between WHITE and GREY / For Freezer side check between BROWN and GREY.
- If open Thermal Fuse is identified it is recommended to replace both compartment Thermal Fuses with a Bi-Metal as well as both Defrost Sensors.
- Bi-Metal # DA47-10160H
- Sensor #DA32-00006W
If one of the thermal fuses fail the unit will not come out of defrost and will only restart when unplugged. Once unit is powered back up the board defaults to factory settings. The unit runs and will go into defrost after 4hrs of compressor run time and never come out until unit is powered down and back up again. Then 4 hours later the same thing and so on.......
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