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Mini-Split Warranty: What's Covered and For How Long?

by Dua Jones May 15, 2026

Mini-split warranties vary significantly between brands and depend on whether the unit is registered at installation. Understanding what is and is not covered — and for how long — helps you make informed purchasing decisions and know your rights when something goes wrong. This guide covers warranty terms across all major brands, what typically voids coverage, and what to do when making a claim.

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Mini-Split Warranty Terms by Brand (2026)

Brand	Parts Warranty	Compressor Warranty	Registration Required?
Mitsubishi Electric	5 years	12 years	Yes — within 60 days of installation
Daikin	5 years	12 years	Yes — within 60 days
Fujitsu	5 years	10 years	Yes
LG	5 years	10 years	Yes
Carrier	5 years	10 years	Yes
Bosch	5 years	7 years	Yes
Samsung	5 years	10 years	Yes
MrCool (DIY)	7 years parts	7 years	Yes — online registration
Pioneer / Senville / Midea	1–5 years	5 years	Varies by brand

Unregistered warranty (if registration is missed): Most brands reduce coverage to 1 year parts / 5 years compressor if the unit is not registered within the required window. Always register within 60 days of installation.

What Warranties Typically Cover

Manufacturing defects in materials and workmanship
Failed components (compressor, PCB, fan motor, heat exchanger) that fail under normal use
Refrigerant leaks that are determined to be a manufacturing defect (not installation error)

What Warranties Typically Do NOT Cover

Labour: Almost no residential mini-split warranty covers labour after year 1. Parts are covered; the technician's time to install them is not.
Installation errors: Damage caused by incorrect installation (wrong refrigerant charge, improper electrical connection, incorrect line set torque) is excluded
Maintenance neglect: Damage resulting from failure to maintain the system (severely dirty coil, never cleaning the filter) is typically excluded
Refrigerant: R-410A, R-32, and other refrigerant costs are typically not covered even when a leak is under warranty
Acts of nature: Lightning, flooding, or physical damage
Commercial use: Some warranties explicitly exclude continuous commercial operation

Frequently Asked Questions

Does DIY installation void the warranty?

It depends on the brand. For standard mini-splits, most manufacturer warranties require installation by a licensed HVAC contractor — DIY installation voids coverage. MrCool's DIY series is explicitly designed for homeowner installation and maintains warranty coverage for self-installed units. Always check the warranty terms for your specific brand before deciding on installation approach.

How do I make a warranty claim?

Contact the manufacturer's warranty department or your installing contractor. You will typically need: proof of purchase, installation date, unit serial number, a description of the fault, and in most cases a diagnosis from a certified technician confirming the nature of the defect. The manufacturer will either arrange repair through an authorised service dealer or provide a replacement part.