Car Stacker Fault — Who Is Actually Responsible?

Your car stacker has failed.

Maybe it happened this morning. Maybe it has been happening for weeks. Cars are stuck. Residents are furious. The building manager is fielding complaints. And everyone — the manufacturer, the installer, the maintenance provider, the body corporate — is pointing at someone else.

Welcome to the most common dispute in automated parking.

After more than twenty years inspecting, auditing, and investigating car stacker and automated parking systems across Australia and Europe, I can tell you this with complete confidence: fault disputes are almost always predictable. The conditions that create them exist long before the first breakdown occurs.

Understanding who is responsible — and why — requires looking at the full chain of decisions that led to the failure. Not just the failure itself.

Why Everyone Points Fingers

When a car stacker fails, there are typically four parties involved:

The manufacturer, who designed and supplied the system. The installer, who built and commissioned it. The maintenance provider, who services it under contract. And the building owner or body corporate, who ultimately owns the asset and carries the liability.

Each of these parties has a defined scope of responsibility. Each has documentation that describes what they agreed to deliver. And in a well-managed project, the boundaries between those scopes are clearly defined, independently verified, and backed by engineering-grade evidence.

In practice, that rarely happens.

What actually happens is this: the manufacturer tests their own system. The installer signs off their own installation. The maintenance provider inherits a system they did not commission and often were not trained on. And the body corporate accepts the keys without any independent verification that the system performs as specified.

When something eventually fails — and in a poorly specified or poorly maintained system, it will — nobody has the independent documentation to establish where responsibility actually sits.

That gap is where disputes are born.

The Four Most Common Fault Categories

Not all car stacker failures are equal. Understanding the category of failure is the first step in establishing responsibility.

1. Design and specification faults

These originate before construction begins. They include vehicle clearance assumptions that do not reflect real-world usage, retrieval cycle times that cannot handle peak demand, structural integration issues between the parking system and the building, and control system specifications that are inadequate for the operational environment.

Design faults are the responsibility of the specifying party — which is typically the manufacturer or their appointed engineer. However, if an independent engineer reviewed and approved the design, that review becomes part of the responsibility chain.

These faults are the hardest to identify after construction because the evidence exists in the original design documentation, not in the installed system.

2. Manufacturing and supply faults

These occur when the system delivered to site does not conform to the approved design. They include components that do not meet specified tolerances, control systems that differ from the approved specification, and materials or assemblies that do not meet the quality standards confirmed at the time of sale.

Manufacturing faults are the responsibility of the manufacturer. However, establishing this requires pre-delivery inspection records or post-installation verification against the original specification. Without that independent record, the manufacturer's own commissioning documentation becomes the primary evidence — and that documentation is rarely neutral.

3. Installation faults

These occur during the construction phase. They include structural alignments outside specification, electrical installations that do not conform to manufacturer guidelines, control system programming errors, and commissioning procedures that were not completed correctly.

Installation faults are the responsibility of the installing contractor. However, without independent installation oversight and commissioning verification, the installer's own sign-off becomes the primary record.

A signed commissioning report is not proof of correct installation. It is proof that the installer believed the installation was correct. Those are not the same thing.

4. Maintenance faults

These occur after handover. They include inadequate servicing schedules, failure to identify developing faults before they cause breakdowns, incorrect repair procedures, and the use of non-compliant replacement parts.

Maintenance faults are the responsibility of the service provider. However, if the maintenance contract does not specify measurable service standards, response times, or performance benchmarks — and most do not — establishing a breach of contract becomes a legal exercise rather than a technical one.

The Question Nobody Asks Early Enough

In almost every fault investigation I have conducted, the same question emerges too late:

Was this system independently verified at any point before the building was handed over?

In the vast majority of cases, the answer is no.

The manufacturer tested their own system. The installer signed off their own work. The commissioning certificate was issued by the party responsible for delivering the system — not by an independent technical authority.

This matters because independent verification creates the evidentiary foundation for every subsequent dispute. Without it, fault investigations become exercises in establishing who has the most convincing documentation, rather than who actually delivered a non-conforming system.

When I conduct a fault investigation, the first thing I look for is not the fault itself. It is the paper trail that should exist from design through to commissioning. What was specified. What was delivered. What was tested. What was verified.

In a properly documented project, that trail makes fault attribution straightforward.

In a typical project, the trail is incomplete — and the dispute fills the gaps.

What Body Corporates and Strata Managers Get Wrong

The most common mistake made by building owners and strata managers is accepting the keys/cards without understanding what they are accepting.

Handover is the point at which responsibility transfers. Once a building owner accepts a car stacker system, they become the responsible party for its ongoing performance — unless they have independent evidence that the system they accepted did not conform to its specification.

That evidence must exist before handover. After handover, the burden of proof shifts significantly.

Most strata managers are not engineers. They are not expected to be. But they are expected to manage assets on behalf of owners. In a building where a car stacker represents one of the most mechanically complex systems — and one of the most expensive to repair or replace — accepting that system without independent technical verification is a significant risk management failure.

I have reviewed maintenance contracts that contained no measurable performance benchmarks. No defined response times. No clear description of what a service actually included. Contracts that gave the service provider enormous latitude to define their own standard of performance.

When the system fails under those contracts, establishing liability is almost impossible.

The contract should have been reviewed before it was signed.

What To Do When Your System Has Already Failed

If your system has failed and a dispute is already underway, the priority is documentation.

Gather everything: the original design drawings, the manufacturer's specification, the commissioning documentation, the maintenance contract, the service records, and every fault log the system has generated.

Then engage an independent technical expert to review that documentation against the installed system.

Independent review does two things. First, it establishes the technical facts — what the system was supposed to do, what it actually does, and where the gap exists. Second, it produces engineering-grade evidence that is admissible in legal, insurance, and tribunal proceedings.

Without that independent foundation, fault disputes typically resolve in favour of whoever has the most documentation — not whoever is actually responsible.

If you are in the middle of a dispute and the only technical evidence available was produced by the parties being disputed, you already have a problem.

What To Do Before Your System Fails

The most effective time to establish independent verification of a car stacker system is before something goes wrong.

An independent audit of an operational system identifies developing faults, maintenance deficiencies, and documentation gaps before they escalate into disputes. It creates a baseline record of system performance that becomes the foundation for any future fault investigation.

An independent review of a maintenance contract before it is signed identifies coverage gaps and unenforceable clauses before they become liabilities.

Independent commissioning verification at the point of handover creates the evidentiary record that protects building owners for the life of the asset.

None of these steps are expensive relative to the cost of a single fault investigation, a strata dispute, or an insurance claim.

They are expensive relative to the cost of doing nothing — until something fails.

When a car stacker fails, the question of who is responsible rarely has a simple answer.

But with the right independent evidence, it has a clear one.

That evidence has to be built before the dispute begins — not after.

If your system has faulted, or you are approaching handover and want independent verification, contact me directly.

I work with building owners, strata managers, insurers, and legal teams to establish the technical facts — without manufacturer bias, without commissions, and without ambiguity.