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Frequently Asked Questions
Why are chillers repaired rather than replaced?
The major structure lasts twenty to thirty years.
Pressure vessels and tube bundles stay sound.
What fails is smaller and replaceable.
The machine can nearly always be kept running.
The question is whether that is the better spend.
What wears out first?
Compressors, motors and bearings.
Sensors and expansion devices follow.
Contactors and starters are consumable too.
These are expected replacements, not faults.
They arrive in a fairly predictable order.
Why do control platforms cause trouble?
They become unsupported before they fail.
A controller can work perfectly and be unavailable.
Replacing it is often a project, not a part.
Interfaces and wiring may change with it.
It can exceed the mechanical repair beside it.
What does tube fouling actually cost?
Performance that drifts away unnoticed.
Heat transfer declines gradually, not suddenly.
Energy use rises with no obvious symptom.
Cleaning or retubing restores it.
Regular monitoring is what reveals the trend.
How does refrigerant affect the decision?
A phased-down refrigerant changes the economics.
Cost rises and availability falls over time.
Mechanical condition becomes beside the point.
That trajectory often decides a replacement.
It should be checked before major spending.
Why does parts availability belong in the purchase decision?
Because it determines lifetime cost.
A thin spares position is expensive later.
None of it appears in the capital comparison.
Lead times matter as much as prices.
The machine is usually critical to the building.
What should be held on site?
The items whose absence stops the machine.
Sensors, contactors and common control parts.
Gaskets and seals for planned work.
Anything with a long lead time.
The supplier can advise for that specific model.