Defrost heater
Melts frost off the cooling coils. Frost buildup and a warm fridge point here.
Temperature control thermostat
Replaces WR09X10110
Senses temperature so the fridge cycles on and off.
Door gasket
A gasket that doesn't seal lets warm air in and frost build up.
Capacitor
Replaces WR62X0079
A motor that hums but won't start often needs a new capacitor.
Door gasket
A gasket that doesn't seal lets warm air in and frost build up.
Evaporator fan blade
A stopped fan means warm sections and frost on the coils.
G.e. appliance light bulb, 40-watt
The light bulb this model takes.
1Defrost heaterWR51X10038
2ThermostatWR09X26874
3Door gasketWR24X10184
4CapacitorWR55X24064Part numbers come from the Sears PartsDirect parts list for the GE GTH18DBDBRWW (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.