Filter
Replaces W10217316
Makers suggest a new water filter about every six months.
Air filter
Replaces W10315189
Air filters load up with dust and smells. The maker lists how often to change it.
Thermistor
Senses temperature so the fridge cycles on and off.
Run capacitor
Replaces 2264017
A motor that hums but won't start often needs a new capacitor.
Light switch
Replaces 1118894
Door, lid and control switches stop a cycle when they fail.
1FilterEDR1RXD1
2Air filterW10311524
3ThermistorWPW10383615
4Run capacitorWPW10662129Part numbers come from the Sears PartsDirect parts list for the Whirlpool WRT779REYB00 (view the list), checked November 15, 2026. Amazon buttons open a search for the part number; we may earn a commission.
Where the model number is
Inside the fresh food section, on a side wall or the ceiling near the light. Some models: behind the kick plate at the bottom.