LG Freezer Not Cooling — Modderfontein Repair
An LG freezer in Modderfontein that's "not cooling" is a common callout across Ekurhuleni. An LG freezer that stops cooling is almost always one of four things: a failed defrost cycle icing the evaporator, a dead or stalling Inverter Linear Compressor, a stuck or failed evaporator fan, or a refrigerant loss in the sealed system. The compressor can still hum while no heat is removed — so "it sounds like it's running" does not rule out a cooling failure.
Technical Overview — LG freezer
LG chest and upright freezers run a hermetic compressor with a single evaporator and a mechanical or electronic defrost cycle. Because they hold sub-zero temperatures, a small refrigerant loss or a failed defrost heater shows up fast as softening stock.
- Hermetic compressor (single-speed or inverter)
- Single evaporator coil
- Defrost heater + bimetal thermostat
- Condenser fan + evaporator fan
- Door seal critical for -18°C hold
Not Cooling — Common Causes & Checklist
An LG freezer that stops cooling is almost always one of four things: a failed defrost cycle icing the evaporator, a dead or stalling Inverter Linear Compressor, a stuck or failed evaporator fan, or a refrigerant loss in the sealed system. The compressor can still hum while no heat is removed — so "it sounds like it's running" does not rule out a cooling failure.
Common Causes
- 01Defrost heater, defrost sensor or bimetal open — evaporator ices over and blocks airflow
- 02Inverter Linear Compressor stall or inverter-board failure — compressor doesn't pump
- 03Evaporator fan motor dead or jammed — cold air never reaches the cabinet
- 04Refrigerant undercharge or sealed-system leak — low cooling capacity
- 05Main PCB not driving the compressor drive or fan outputs
Diagnostic Checklist
- Confirm the cabinet warms while the compressor still energises
- Inspect the evaporator coil for a solid ice block (defrost failure)
- Measure defrost heater continuity and defrost sensor resistance
- Test the inverter board output to the compressor
- Check evaporator fan voltage at the PCB and motor resistance
- Recover and weigh refrigerant charge if the sealed system is suspect
Serving Modderfontein & the Ekurhuleni area
Modderfontein's Thornhill Estate and Greenstone-adjacent developments are within our fastest response band.
How Our Repair Process Works
Book a diagnostic
Call or WhatsApp 069 268 0988 to lock in a same-day slot in Modderfontein.
On-site diagnosis
We test the failing subsystem — sensors, defrost circuit, compressor drive, fans and PCB — before quoting.
Transparent quote
You get a clear quote for parts and labour. No work starts until you approve it.
Repair & test
We fit genuine-quality parts, run the unit under load, and confirm the fault is gone before we leave.
Frequently Asked Questions
Can my LG freezer be repaired if it's not cooling?
Yes — in most cases the fix is a defrost heater, fan motor, sensor or inverter board rather than a full compressor. We diagnose before quoting so you don't pay for parts you don't need.
Is it worth repairing or should I replace it?
If the sealed system (compressor/leak) is sound, repairing is almost always cheaper. We'll tell you honestly if a compressor or leak makes replacement the better call.
Related Repairs & Locations
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Reyds LG Service is an independent appliance repair service. We are not affiliated with, endorsed by, or authorised by LG Electronics. All trademarks belong to their respective owners.