ApplianceField Lab
Failed-compressor case · LG

A Standard Compressor Job Did Not Resolve the Original Complaint

With no cooling after the compressor, filter and purge, the diagnosis had to return to first principles: was the original fault a leak, or did the repair introduce a restriction or valve problem?

LG Still Not Cooling After Compressor
Case snapshot

What the source establishes

  • A 2018 LG did not cool or freeze.
  • The compressor and filter were replaced and the system was purged, but the complaint remained.
  • The technician said this was the second recent case with the same unresolved result.
  • The discussion reopened the original diagnosis and listed leak, oil, restricted brazed tubing, overheated three-way valve, purge direction and a leaking joint as distinct branches.
  • No pressure readings or final repair were posted.

A similar symptom can have a different cause on another appliance or model.

Diagnostic process

How the evidence narrowed the diagnosis

Attempt

Compressor and filter were replaced

The refrigerator remained unable to cool, so the completed work did not prove the original diagnosis.

Missing evidence

No operating pressures were supplied

The experts asked for gauge readings because the same symptom can emerge from different sealed-system paths.

Reopened branches

Leak and post-repair restriction both remained

Oil, a pinched joint, three-way valve heat damage, purge direction and a leaking braze were kept separate.

What the evidence supports

What the evidence supports

The evidence supports only that the compressor replacement did not close the diagnosis. A measured sealed-system evaluation is required to distinguish an incorrect original diagnosis from a restriction or leak created or missed during service.

What to do next

What should be verified next

Document low- and high-side behavior, temperatures, charge method and every joint disturbed. A sealed-system technician should then test the branch indicated by those measurements instead of repeating the compressor replacement.

Continue with comparable evidence

Cases closest to this diagnosis

Same brand LG LMXS27626D: Negative Low Pressure After Compressor Replacement An LG LMXS27626D pulled to -20 psi after a compressor replacement. A nitrogen purge moved trapped oil and the refrigerator began working. Same appliance family Sub-Zero Not Cooling One Month After Sealed-System Repair A Sub-Zero stopped cooling a month after compressor and evaporator work. A clean evaporator shifted the diagnosis toward an oil-line restriction; the final repair … Same appliance family Freezer Cold but Refrigerator Warm: Where to Look First Five real cases explain why a cold freezer and warm refrigerator can point to airflow, ice, board setup or refrigerant distribution.
Refrigerant and pressure safety: gauge interpretation, leak testing, nitrogen use, brazing and refrigerant charging require qualified sealed-system service.
Parts changed, problem stayed

A replacement that did not solve the fault

Includes a recorded replacement that did not help GE Café Dispenser Flap Opens When the Lower Door Closes A GE Café dispenser flap opens when a lower door closes. Failed boards and dispenser parts gave way to a confirmed embedded door-switch fault.
Unexpected turn

A repair that did not follow the obvious path

An unusual turn supported by the case record Viking VGSC3074BSS Overheated After a New Thermostat A Viking VGSC3074BSS climbed toward 500°F after a new thermostat. The failed replacement shifted diagnosis to selector and self-clean control branches.
Fresh field notes

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