Four-Year-Old LG Losing Gas: High-Floor Wind Corroded Pipes

A four-year-old system loses gas and poor manufacturing is suspected. Whether the equipment is at fault or its position is.

By Team Snowflake | Updated 24 Aug 2026

Teaching case based on recurring Snowflake service patterns; identifying details are combined.

How this presents

Refrigerant loss on a fairly young system, in a flat on a high floor with the outdoor unit fully exposed. Nothing was disturbed before the loss began. Comparable systems elsewhere in the same block have given no trouble at all.

Setup: LG Wall-mounted1-3 yearsCondoPunggol
Misread as: A manufacturing problem or a poor-quality unit, since the system is not old.
Check first: How much shelter the outdoor unit's position actually provides

What else produces this

A system failing earlier than its neighbours has either a defect or a different environment. Environment is far quicker to assess, so it goes first. High floors take stronger wind and driven rain, which means an outdoor unit there is wet more often and dries more slowly, holding moisture in every joint and crevice. Looking at how much shelter the position offers explains an early failure without implying anything is wrong with the equipment itself.

Comparable systems in the same building performing well argues against a defect in the model.
An outdoor unit with no shelter on an exposed high floor takes wind-driven rain directly.
Corrosion concentrated at the pipe connections matches persistent moisture rather than years of service.
Refrigerant traces at those connections locate the loss where the corrosion is worst.

Why it happens

Metal corrodes at a rate set by how long it stays wet. An exposed position at height means driven rain reaches surfaces that would otherwise stay dry, and wind carries moisture into joints and under insulation where it lingers for days. The connections corrode from the outside inward until a seal is lost. The same unit under shelter would take considerably longer to reach that point.

What resolution involves

The affected connections are repaired and then protected, with insulation sealed properly and the joints shielded from direct weather. That protection is the part that changes the future rather than the present. Where a position is this exposed, the useful expectation is a shorter interval between inspections rather than the same schedule applied to a much harder environment.

How to tell it worked

The state of the insulation and the joint protection at the next inspection, not simply whether the charge is still holding. Protection that has lifted or split puts the repair straight back on the same path it was on before.

Before you approve a quote

Exposure sets the rate, not the age on the paperwork

Corrosion tracks how long metal stays wet. Position decides that far more than years in service.
An early failure on an exposed unit is not a defect. Compare against sheltered units nearby.
Repair without protecting the joint puts the same failure back on the same timeline.

Questions this case answers

Can a four year old aircon really have corroded pipes?

Height brings stronger wind and driven rain, which reaches surfaces that would stay dry lower down. Moisture is also forced into joints and under insulation, where it stays long after the surface has dried.

Does a high floor ledge wear an outdoor unit out faster?

Yes, where the position is exposed. Metal corrodes at a rate set by how long it stays wet, and driven rain at height reaches surfaces that would stay dry lower down, so the same unit under shelter would take considerably longer to reach a leak.

Would a weather shield over the outdoor unit help?

Yes; shielding the connections from direct rain where the position allows is part of protecting the repair. The insulation was also sealed properly at every joint, and this exposed unit needs inspecting more often than a sheltered one.

How do I know whether a leak can be welded or needs more?

By comparing with similar systems in the same building. Where the neighbours behave normally, the difference is the position rather than the product, and a leak at an accessible connection is usually weldable.

Describe your situation

Tell us what’s going on. Symptoms, setup, photos, anything we should know. We’ll assess and come back with the right next step.

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