GE GSS20IBMCWW Refrigerator — Common Problems and How to Fix Them
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Understanding the Problem
Overview: The GSS20IBMCWW is a GE side‑by‑side refrigerator (20 cu ft class). Owners commonly report issues with poor cooling, ice maker or water dispenser failures, unusual noises, and frost/defrost problems. Below are prioritized diagnostic steps and practical repairs you can do at home. 1) Initial checks (quick and often fixes): a. Verify temperature settings: fridge 37°F (3°C) and freezer 0°F (–18°C). b. Check for blocked airflow: remove food from vents and ensure nothing is blocking internal vents in fresh food and freezer cavities. c. Clean condenser coils: unplug fridge, pull it out and vacuum dust from the condenser coils and grille — dirty coils cause long run times and poor cooling. 2) If the refrigerator is not cooling (fridge warm, freezer cold or both warm): a. Listen: Is the compressor running? A healthy fridge will have a low humming from the compressor and you should hear the evaporator fan running when compressor is on. b. Check condenser fan (at bottom): unplug, remove bottom kick plate, spin fan by hand. If seized or noisy, replace fan motor. c. Check evaporator fan (inside freezer): open freezer door and force door switch closed (or watch behavior while compressor runs). If no airflow from freezer toward fridge, evaporator fan may be dead or blocked by frost. Replace fan motor if it doesn't run. d. Inspect evaporator coil frost pattern: pull freezer back panel (after unplugging) — heavy frost across the coil indicates defrost failure (heater or defrost thermostat or control). e. Test start device/relay: a clicking relay or a humming compressor that won't start points to a bad start relay/overload. Replace start relay/overload kit if suspect. f. If compressor runs but both compartments are warm and coils are not frosted, sealed system failure (low refrigerant) likely — call HVAC/refrigeration tech for sealed‑system repair. 3) If freezer or fridge is frosting up / not defrosting properly: a. Test defrost heater continuity and continuity of defrost thermostat/thermistor with a multimeter. b. If parts open, replace defrost heater and thermostat; also check/replace defrost control or main board if it isn't initiating defrost. c. Clear heavy frost manually first (unplug and allow to fully defrost) to restore temporary operation. 4) If ice maker is not making ice or water dispenser not working: a. Confirm water supply: check shutoff valve behind fridge is open. b. Check/replace water filter (clogged filters will restrict or stop flow) — try temporarily bypassing filter if model allows. c. Inspect water inlet valve for leaks and test solenoid continuity; if it doesn’t open under dispenser/ice call, replace inlet valve. d. For the ice maker motor: do a manual harvest cycle (follow unit’s service manual or press the ice maker test switch) to see if the motor runs and whether a fill occurs. Replace ice maker module if motor/gears fail. e. Check and clear any frozen fill tube (use hair dryer on LOW from outside) after turning off ice maker. 5) If noisy (rattling, buzzing, or loud hum): a. Identify source — compressor (low, steady hum) vs fans (higher pitch, whine, or rattle) vs ice maker (clicks and motor sounds). b. Isolate by listening with a cardboard tube; replace noisy fan motors or fan blades if damaged; replace fan motor mounts if vibration. 6) If leaking water: a. Inspect door gaskets for sealing; replace if torn. b. Check drain pan and drain tube for cracks/clogs. c. Inspect water inlet valve and supply line for leaks; replace leaking valve or tubing. 7) Control, sensors and electronics: a. Test thermistors/temperature sensors (usually 10kΩ type) and replace if out of range. b. If the compressor, fans, and defrost circuits check good but fridge behaves erratically, the main control board or UI/control board may be failing — replace board if diagnostics point to it. Repair notes and how to fix: - Replace fan motors: unplug fridge, remove appropriate panels (bottom kickplate for condenser fan; freezer back panel for evaporator fan), disconnect wiring harness, remove mounting screws and swap motors. - Replace start relay/overload: unplug fridge, pull unit forward, locate compressor relay on the compressor, remove clip and replace with OEM relay kit. - Replace water inlet valve: shut off water, remove back panel, disconnect water lines and wiring, swap valve, reattach lines, turn water on and check for leaks. - Replace defrost heater/thermostat: unplug, remove evaporator cover in freezer, disconnect heater and thermostat, install new parts, reassemble. - Replace ice maker: remove front freezer shelf, disconnect wiring harness and mounting screws, install new ice maker module and test. Safety note: Always unplug the refrigerator before accessing electrical components. For sealed‑system (compressor or refrigerant) repairs, contact a certified refrigeration technician — these require EPA certification and specialized tools. Verify spare part compatibility by matching the model and serial number on the rating plate before ordering parts.
Common Symptoms
Fridge runs constantly but cooling is poor; freezer icing up or heavy frost on evaporator; ice maker not filling or no water at dispenser; loud fan or rattling noises; water leaks under fridge.
Common Causes
- Clogged/dirty condenser coils or blocked airflow
- Failed evaporator or condenser fan motor
- Defrost system failure (heater, thermostat, or control)
- Bad start relay or failing compressor (sealed system issues)
- Faulty water inlet valve, clogged water filter, or ice maker failure
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Helpful Repair Tip
To confirm a failed evaporator fan (most common cooling airflow culprit): set fridge to cold, open freezer door and manually force the door switch (or start compressor), then listen — if compressor runs but you don’t hear the evaporator fan and there’s no air circulation from freezer to fridge, the evaporator fan motor is likely bad and should be replaced.
Frequently Asked Questions
My fridge runs all the time but the freezer is cold — what should I check first?
Start with airflow: make sure freezer vents and evaporator fan are working. Clean the condenser coils, check the condenser and evaporator fans, and inspect the evaporator for heavy frost (which indicates defrost failure). If fans and defrost are OK but cooling is weak, test the compressor start relay; a failed relay or a sealed‑system problem may be the cause.
The ice maker stopped filling — is it the ice maker or the water valve?
Check the water supply and filter first (a clogged filter often reduces or stops filling). Next, run a diagnostic or manual fill on the ice maker: if the ice maker attempts to fill but no water flows, test the water inlet valve solenoids for continuity and for 120V at fill time; if the valve doesn’t open, replace it. If the valve opens but no ice is made, the ice maker module (motor or sensor) may be bad.
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