Freezer Not Freezing
In this guide, I’ll walk you through diagnosing and repairing a freezer that has stopped freezing on the GE GSS25GYPFS side-by-side refrigerator. I’ll cover the most common causes, from a failed evaporator fan motor to a faulty defrost heater, and provide clear steps that most homeowners can complete in 1–2 hours with basic tools. No special HVAC certification is required for these repairs.
Common Symptoms & Causes
Before diving into repairs, confirm your unit is displaying one or more of these telltale signs:
- Freezer compartment is warm or only slightly cool (above 10°F)
- Ice maker has stopped producing ice or output has dropped significantly
- Frost or ice buildup visible on the back wall of the freezer compartment
- Refrigerator side is also warming, suggesting a shared airflow problem
From my experience, the most common root cause on the GE GSS25GYPFS is a failed defrost system — either a burned-out defrost heater or a defective defrost thermostat — which allows frost to block the evaporator coils and choke off cold airflow to both compartments.
Safety First
- Unplug the refrigerator from the wall outlet before removing any panels or touching internal components
- Wear work gloves when handling metal panels and evaporator coils to avoid cuts
- Photograph all wiring harness connections before disconnecting anything so you can reassemble correctly
- Work in a well-lit space and use a flashlight or headlamp inside the freezer cabinet
Tools & Parts Needed
Essential Tools
- Phillips and flat-head screwdrivers
- ¼-inch nut driver or socket set
- Multimeter (for continuity and resistance testing)
- Hair dryer or heat gun (to manually defrost coils if heavily iced over)
- Needle-nose pliers
Replacement Parts
- GE Defrost Heater (WR51X10055)
- GE Defrost Thermostat (WR50X10068)
- GE Evaporator Fan Motor (WR60X10220)
Step-by-Step Repair Instructions
🔨 Pro Tip from Dave
On the GSS25GYPFS, the defrost thermal limiter (the small one-shot fuse clipped directly to the evaporator) fails far more often than you might expect. It’s almost always overlooked because the defrost heater itself might test fine — always check continuity on that limiter separately before declaring the heater good. I’ve seen many DIYers and even some newer technicians replace the heater, button everything back up, and find themselves with the same frozen coil problem two weeks later because that $6 limiter was the real villain all along.
Step 1: Unplug and Empty the Freezer
First things first: disconnect the refrigerator from power and remove all food and shelving from the freezer compartment. Store frozen items in a cooler with ice to keep them safe during the repair. This gives you clear access to the back panel where the evaporator assembly is located.
Step 2: Remove the Freezer Back Panel
Next, remove the screws securing the interior back panel of the freezer — typically 4–6 Phillips screws along the edges. Carefully pull the panel forward; it may be held in place by frost if the defrost system has failed. Use a hair dryer on low heat to gently melt any ice bonding the panel before forcing it free.
Step 3: Inspect the Evaporator Coils
With the back panel removed, look at the evaporator coils. If they are encased in a solid block of frost or ice, the defrost system is definitely the culprit. Use your hair dryer to thaw the coils completely before testing any components — frozen components will give false multimeter readings.
Step 4: Test the Defrost Heater
Disconnect the defrost heater wire terminals and set your multimeter to the ohms (Ω) setting. Touch the probes to the heater terminals — a working heater reads approximately 30–90 ohms; an open reading (OL or infinite resistance) means the heater has burned out and must be replaced. A failed heater is the single most common cause of this issue on the GSS25GYPFS.
Step 5: Test the Defrost Thermostat
The defrost thermostat (also called a thermal limiter) is clipped to the evaporator coil and has two wire leads. With the thermostat at freezer temperature, test for continuity — it should show continuity (closed circuit) when cold. If your meter reads OL when the thermostat is cold, it has failed and needs to be replaced alongside the heater.
Step 6: Check the Evaporator Fan Motor
The evaporator fan motor sits beside the coils and circulates cold air through both the freezer and refrigerator sections. Spin the fan blade by hand — it should turn freely with no grinding. Reconnect power briefly and listen for the fan to run; if it hums but doesn’t spin, or makes no noise at all, test the motor for continuity and replace it if it shows an open circuit.
Step 7: Reassemble and Test
Install your replacement parts, reconnect all wire harnesses (referencing your photos from Step 1), and reattach the back panel. Plug the refrigerator back in and allow 4–6 hours for the freezer to reach its target temperature of 0°F. If temperatures stabilize and the ice maker resumes production, you’ve successfully completed the repair.
How Much Does This Repair Cost?
| Repair route | Typical cost |
|---|---|
| Do it yourself | $20–$75 (parts) |
| Professional repair | $150–$300 (parts and labor) |
Doing this repair yourself typically costs between $20 and $75 in parts — a defrost heater runs $25–$40, a defrost thermostat around $15–$25, and an evaporator fan motor $30–$65. Compare that to a professional appliance service call, which typically runs $150–$300 including labor and markup on the same parts. DIY repairs on this model can save you $100 or more, and most homeowners complete the job in under two hours.
When to Call a Professional
Most of the repairs in this guide are within reach for a careful DIYer with basic tools. In my experience, if your diagnosis points to a refrigerant leak — meaning the evaporator coils are clear of frost, the fans and defrost system all check out, yet the freezer still won’t get below 20°F — that repair requires EPA 608 certification and specialized recovery equipment. At that point, it’s time to call a licensed technician rather than proceed on your own. When in doubt, a diagnostic service call typically costs $80–$120 and can save you from a misdiagnosis that costs more in parts.
The Defrost Thermostat That Usually Gets Blamed for the Wrong Thing
On this GSS25GYPFS, the defrost thermostat (WR50X10068) is your second diagnostic stop after you’ve ruled out a completely blocked evaporator coil—it’s the component that tells the defrost heater when to kick on and melt the frost buildup. If it’s stuck open or reading false, the coil never defrosts, the airflow gets choked off, and your freezer temperature climbs into the 20s while you’re wondering if the compressor is dead.
What works
- Pulls cleanly out of the evaporator housing without needing to disassemble half the fridge—you access it from the freezer side after removing the back panel.
- Continuity test with a multimeter tells you instantly if it’s failed (no continuity when cold = bad part, order the replacement immediately).
- Swap-in part with no special tools required—two wire connectors and you’re done; takes maybe five minutes once you’re inside the compartment.
What doesn’t
- Won’t fix your problem if the defrost heater itself is burnt out or the evaporator coil is physically damaged—you have to rule those out first or you’ll replace this part and still have a freezer that doesn’t freeze.
- Can be hard to locate on first teardown if you’re not familiar with the layout; the housing sits tucked in the back, and poor lighting makes finding those two connectors frustrating.
I’ve had more than a few DIYers order this part first because the freezer isn’t cold, only to realize later that frost was actually packed solid in the coil and the thermostat was doing its job—the real problem was a failed defrost heater that had been sitting idle for months. Test continuity on the thermostat before you order, and if you get readings, move down the defrost chain. GE Defrost Thermostat (WR50X10068)
About This Article
Written by Dave Holt. Dave Holt has been taking apart and fixing household appliances since he was a teenager who couldn't leave a broken one alone. Eighteen years later, after fixing things for neighbors, friends, and anyone who'd let him, he's seen almost every failure mode there is. When he writes a repair guide here, it's based on the actual job, not a manufacturer overview. More about this site.
Scope and limits. Dave is a self-taught repairer, not a certified appliance technician. Unplug before you open anything, and leave sealed refrigeration systems, gas connections, and hardwired circuits to a qualified technician.
