WRF736SDAM13 Whirlpool Gold Series Refridgerator – Freezer Not Defrosting

Our Whirlpool Gold Series Refridgerator¬†WRF736SDAM13 is not defrosting. All other functions of the refridgerator are working correctly until the freezer section coils ice up. After running correctly for about 10-12 hours, we have to manually (turn off cooling) defrost the freezer coils. The evaporator fan assembly including the thermistor (temperature sensor), defrost thermostat , defrost thermal fuse, and other components attached to the wiring harness were recently replaced with new part. The evaporator fan had stopeed blowing. The coils and back, underneath of the refridgerator are clean. I think it may be one of the following: DEFROST TIMER DEFROST HEATER DEFROST CONTROL BOARD I ran diagnostics and get an E1 response for tests 56 and 66. Searching for what this error code means...... Searching for where the DEFROST HEATER is located on this refridgerator. TBD..........................................................................   ARTICLES & INFO I've found -¬†   HOW TO FORCE DEFROST: To run a forced defrost cycle open the refrigerator door or doors if your refrigerator is a french door model. Then hold down the door switch...
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Whirlpool Gold Series Refrigerator Evaporator Fan Motor Replacement Part Number WPW10276647

Steps for replacing Whirlpool Part Number WPW10276647 The evaporator motor is located the interior of the freezer compartment. Below are steps to replace the evaporator motor: 1. unplug the refrigerator power cord 2. remove the freezer bin 3. push in the rails retaining clips to removed rails and door it comes out as one unit 4. remove (4) 1/4" screws holding the inside back access panel 5. remove the sensor cover with a flat screwdriver and removed sensor from cover 6. remove fan cover with a flat screwdriver 7. remove access panel 8. unplug harness connectors 9. unclip grounding wire 10. remove fan mounting bracket (2) screws and fan bracket 11. remove fan 12. removed fan blade by turning and pulling 13. removed fan blade retaining clips support bracket 14. removed wiring clips 15. removed motor support bushing To assemble go on the reverse order. Should take about 15 minutes to repair. *Note: if frost is built up use a hair dryer. Do not use sharp tools to remove any ice built up....
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