Defrost heater
Melts frost off the cooling coils. Frost buildup and a warm fridge point here.
Evaporator thermistor
Replaces 242290506
Senses temperature so the fridge cycles on and off.
Roller assembly, right
Thumping or squealing during a cycle points to worn rollers, pulleys or bearings.
Door gasket
A gasket that doesn't seal lets warm air in and frost build up.
Roller assembly, left
Thumping or squealing during a cycle points to worn rollers, pulleys or bearings.
Roller
Thumping or squealing during a cycle points to worn rollers, pulleys or bearings.
Evaporator fan blade
A stopped fan means warm sections and frost on the coils.
Crisper drawer - refrigerator storage component by frigidaire
Crisper drawers, shelves and door bins made for this fridge.
Door gallon bin
Crisper drawers, shelves and door bins made for this fridge.
Door bin
Crisper drawers, shelves and door bins made for this fridge.
1Defrost heater242044008
2Thermistor5303918645
3Roller assembly241889001
4Door gasket242193212Part numbers come from the Sears PartsDirect parts list for the Frigidaire LFHT1831QF4 (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.