WorthItToFixWhat the repair costs, and whether to DIY

GE Refrigerator Thermostat: Cost & When It’s Not Worth It

$140–320 total (shop) · $11–37 DIY part
Part prices $11–37 on eBay (checked 2026-11-04) · shop total from published rates ($70–130 service call, $50–125/hr) · estimates, not quotes
It’s usually a cheap, worth-it fix. GE’s two thermostat families (the freezer defrost thermostat and the cold control) are both low-cost parts, and readers reach them through similar panel-off steps.
⚠️Match the symptom to the part. A frosted evaporator (and weak cooling between defrosts) points at the defrost thermostat clipped to the coil, the main walkthrough’s part; a box that never reaches setpoint points at the cold control behind the temperature knob. Unplug first, and empty the shelf you have to empty.
Your model number decides which part you need.
It’s printed on a sticker inside the door rim or on the back panel, then match it against the parts listed below.

Triage, most likely first

CauseDIYCost
Evaporator ices up between defrosts; box never reaches setpoint, compressor running on2/5 · 60–90 min$11–37 DIY · $140–320 shop
Coil frosts even with a healthy defrost thermostat3/5defrost systems fail in sets: check the heater and timer with it
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Walkthrough

GE Refrigerator Won't Cool? Replace Thermostat #WR09X10042
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511k views · GE Refrigerator Defrost Thermostat Replaceme · also helpful

Parts

GE refrigerator thermostat WR50X10068 · WR09X10042 (defrost thermostat and cold control are different fits; verify against your model plate).