Samsung refrigerator troubleshooting guide for models RFG29PHDBP, RFG29PHDPN, RFG29PHDRS, RFG29PHDWP. This Samsung refrigerator troubleshooting guide contains electrical schematics and instructions for setting the fridge in different modes via the control display/panel.
This information includes: self diagnosis mode, sales mode, forced mode, forced freeze, ice maker troubleshooting, specific error codes, compressor and system operation testing, LED light identification on main board, main board pin identification, temperature, resistance, and voltage charts for Samsung refrigerators.
This Samsung refrigerator troubleshooting guide is intended for use by persons having electrical, electronic, and mechanical experience and knowledge at a level generally considered acceptable in the appliance repair trade. Any attempt to repair a major appliance may result in personal injury and property damage. Samsung refrigerator Models Covered for Troubleshooting: RFG29PHDBP RFG29PHDPN RFG29PHDRS RFG29PHDWP.
Self Diagnosis: Press both buttons
(Energy Saver – Lighting) simultaneously (No sound when both buttons are pressed at the same time) till the display quits blinking and beeps, 8 – 12 seconds, then release and read Fault Codes. This will also cancel the Fault Mode created by self – diagnosis at power up.
Forced Mode: Press both buttons (Energy Saver – Fridge) simultaneously (No sound when both buttons are pressed at the same time) till it beeps and goes blank, 8 – 12 seconds.
Sales Mode = No Compressor Operation
Press Energy Saver & Freezer temp buttons simultaneously for 3 sec (you will hear a “Ding Dong”) to remove or put into Sales Mode. When in the Sales Mode the Display will show “OF” “OF” Removing power will not cancel this mode.
Brushless DC Fan motors are used to save energy. The fans operate at two speeds. Fan speed information is read by the Main PCB. If the fan speed exceeds 600 RPM or the speed is too slow, or stopped the fan drive circuit is disabled, After 10 seconds the circuit tries again with 3 seconds of DC voltage If the fan continues this activity for 5 cycles, 10 seconds off 3 seconds on, the fan drive circuit is disabled for 10 minutes.
TO TEST THE FAN CIRCUIT VOLTAGE:
Power off and back on to check the DC voltage to the motor, wait from 10 to 60 seconds for the fan voltage to kick in, and then check fan voltage, the average reading is 9 VDC. If you get 3 seconds of voltage every 10 seconds for the 5 fan power up cycles, then the Main PCB is good.
NOTE: You may need to put unit in FORCED FREEZE mode to activate the fans/compressor. If the fan blade is blocked by ice, then defrost and check the motor again, after removing power from the unit. If the evaporator is ice blocked and thus blocking the air flow, the fan will over RPM and is stopped. Remove ice and check the motor again. If everything is clear around the fan blade then the motor would be at fault. Continuous fan errors will be displayed on the front panel display.
PLEASE NOTE: The door switches control the evaporator fan motors. Have them closed to test the motors. Delay time 10 – 60 seconds.
Heat Release Ice production explanation:
38 minutes after the water fill is complete, the control board will check the temperature of the eject Thermistor, on the Ice Maker Head, if the Thermistor reads a temperature lower than 18.5 degrees for more than 5 seconds, then the ice production process is completed. The Ice maker will harvest if the ice bucket is not sensed as full. If a Fault Mode is detected with the Ice Maker operation, the Ice Maker stops working for 3 hours. Which means, the Ice Maker checks the operation every 3 hours until it works properly.
Heat Release I/M Test Mode:
Press and hold the ICE TEST S/W for at least 1.5 sec, the harvest function will start. If the ice maker Thermistor is below 0 degrees the Ice maker heater turns on for about 2 minutes. If the temperature exceeds 0 degrees, Ice maker heater turns on for 30 seconds. After the Ice maker heater turns on for 30 seconds, the heater turns off and then Ice maker harvest motor turns on. The motor will rotate in right direction for about 3 minutes, after this, water supply valve is turned on, then the valve is turned off, the test mode is completed. If the above operation is not carried out within 6 minutes, it will go into a fault mode.
FREEZER TEMPERATURE CONTROL BY THE ICE MAKER
Interior Temperature of the freezer will be set to – 14 degrees Fahrenheit until the ice bucket is full. When the ice bucket is full, the freezer will maintain original set temperature. Also, whenever the ice is used, the freezer will again set to – 14 degrees Fahrenheit. Selecting “Ice Off” will allow the freezer to be controlled by the set temperature. If water is not hooked up, the freezer will always be at – 14 unless “Ice Off” is selected.
Compressor & System Operation Testing
The Time Divided Multi – cycle (TDM) System (Stepper Valve) is used to switch refrigerant flow. This improves temperature control and energy efficiency. If it fails in the all evaporator mode, it should work properly, using slightly more energy. If it fails in the Freezer evaporator only mode, there will be a Fridge no cool Force on the Fridge with the “Power Cool” option. Monitor the Fridge evaporator(s) temp by using the Defrost Sensor(s). If the temp doesn’t decrease, then suspect the Main PCB is not supplying signal to switch the diverter valve.
If you have issues with your Samsung refrigerator and you have ran the tests above and still have issues, please leave a comment below and we will be happy to assist.