Display panel on fridge door display flashing from 4 to 7 and beeps 5 times.

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I have a Kenwood tall fridge (KTL60X15) which developed similar faults. It was beeping every time the door was opened (the display showed 88 and all other buttons were lit) and it would beep again when closed. Turns out the wiring from the fridge body to the door had worn out and by the time I discovered the problem 3 of the 5 wires had broken. The wiring can be round under the plastic covers at the top of the door and at the top of the fridge body.. I replace the wiring which was easy to do as it comes as a wiring harness kit (HK1495740) and adjusted how the wiring goes across the top hinge by making a small modification to the plastic covering on the top of the fridge body. So hopefully it won't wear out (at least now I can see it and keep an eye on it).

high low voltage board were likely not needed
board registers high temp and after a few days of constant high temp alarm will restart
by replacing low volt board all you did is start with empty register also when replacing low volt board they have to be programed for your model
sounds like you need service for your cooling issue

try opening the door.leave it open.unplug the fridge for at least 5 minutes, no less,with the door still open.after that,plug it back in.wait for it to beep.then close the door.
this would reset the door alarm,which beepes when the door isn't properly closed.
also you should wait 24 hours between changing the temperature or it can mess up your fridge.!

helps to know what fridge

Fridge keeps beeping or buzzing: The following is for Frigidaire models but others can be addressed similarly.

Several Frigidaire refrigerator models have an electronic control panel on the freezer door the owner can use to adjust the internal temperature, dispense ice and water and receive notification about issues such as the need to replace a water filter. The refrigerators also emit a beep for various actions and as an occasional alarm. Determining what causes the beeps necessitates some troubleshooting.
Temperature Controls ·A Frigidaire refrigerator's display panel blinks when the control panel is touched to set temperature controls. After pressing "Freezer Temp" or "Refrigerator Temp" on the keypad, press the arrow buttons within five seconds to increase or decrease the desired temperature. If you do not press the arrow buttons within five seconds after pressing "Freezer Temp" or "Refrigerator Temp" on the keypad, the refrigerator beeps to indicate the current setting will stay in place.

Door Open ·When you leave the refrigerator or freezer door open, the refrigerator beeps. Also, the "Door Ajar" indicator illuminates on the appliance's display panel. Shutting the door and pressing "Alarm Reset" stops the beeping and turns off the "Door Ajar" indicator light.
·The Frigidaire refrigerator has a control lock feature that prevents use of its control panel or dispensers when the unit is locked. When the control lock is active, a beep sounds when a keypad or dispenser is pressed. Release the control lock by pressing the "Control Lock" icon for three seconds. A beep will sound, and the icon's light will go out.
Power Reset ·A power reset is occasionally necessary if the Frigidaire refrigerator's control panel does not work normally or a reset function on the keypad does not work. A power reset involves disconnecting power to the refrigerator by unplugging its power cord from the electrical outlet, waiting 30 seconds and plugging the power cord back into the electrical outlet. When the control panel resets, a beep sounds. If the refrigerator beeps even after a power reset and the beeps' source is not known, contact Frigidaire.


Read more :http://www.ehow.com/info_12148688_cause-beeping-noise-frigidaire-refrigerator.html
Cause of Beeping Noise in Frigidaire Refrigerator eHow

On the display panel press the right key that turns the door alarm on and off

here is a link for your owners manual click here

To set Self-Clean:
1. Close the oven door.
2. Press the appropriate Clean pad.
• CLEAN flashes.
• SET and UPPER or LOWER flash in the display.
3. Press the Autoset pad.
• “MEd” (Medium Soil, 3 hours) is displayed.
4. Press the Autoset pad to scroll through the self-cleaning
settings.
“HVy” (Heavy Soil, 4 hours)
“MEd” (Medium soil, 3 hours)
“LITE” ( Light Soil, 2 hours)
Choosing the soil level of the oven automatically programs
the self-cleaning time.
5. After four seconds, the oven will start cleaning.
• If the door is not closed, beeps will sound and ‘door’ will
display. If the door is not closed within 30 seconds, the
self-cleaning operation will be canceled and the display
will return to the time of day.
• CLEAN will appear in the display.
• LOCK will flash in the display. Once the door locks,
LOCK will remain steady.
• The cleaning time will start counting down in the
display.

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Unplug your refrigerator from the ac outlet, and 0open theref door for approx. 5 minutes. Then plug it again, after you hear the beeping close the door. wallah it's fixed.

HERE TIS RIGHT OFF THE INSTRUCTION SHEET.  THE TECH JUST LEFT. POWER UP REF. PROGRAM CODE IS LOCATED ON SERIAL PLATE ON THIS UNIT AFTER THE WORD CODE.-1. PRESS & HOLD THE DOOR ALARM KEYPAD.-2. PRESS & HOLD FREEZER TEMP DOWN KEYPAD.-3. RELEASE DOOR ALARM KEYPAD AND WAIT 3 SECS.-4.CONTROL WILL DISPLAY PE TO INDICATE PROGRAMMING MODE-5. ENTRY IS CONFIRMED BY PRESSING TEMP DOWN - KEYPAD ONCE MORE.-CONTROL WILL DISPLAY CURRENT PROGRAM CODE. THIS VALUE SHOULD BE VALIDATED THE THE PROGRAM CODE PRINTED ON UNIT SERIAL PLATE.-NOTE: IF PROGRAM CODE IS CORRECT, THE PROGRAMMING MODE IS EXITED BY CLOSING THE FRIG DOOR.-7.PRESS REFRIG TEMP UP KEYPAD + OR REFRIG DOWN KEYPAD -TO CHANGE THE DIGIT VALUE WITH EACH KEY PRESS.-8.THE DECIMAL POINT INDICATES THE SELECTED DIGIT. PRESS THE FREEZER TEMP UP KEYPAD + TO SELECT NEXT DIGIT.-9.ONCE DEIRED PROGRAM CODE IS DISPLAYED, PRESS AND HOLD THE FREZZER TEMP DOWN KEYPAD - UNTIL UNIT PROGRAM CODE BEGINS FLASHING INDICATING IT HAS BEEN SAVED. *note* IF YOU ATTEMPT TO ENTER AN INVALID PROGRAM CODE, THE CONTROL WILL NOT SAVE THE NEW CODE, BUT WILL BEEP! (THE UNIT WILL NOT RUN RUN WITH A UNIT PROGRAM CODE OF 0000). ONCE THE PROGRAM CODE HAS BEEN SAVED THE PROGRAMMING MODE IS EXITED BY CLOSING THE FRIG DOORS.