In New Zealand, most reputable heat pump installers offer a labour warranty of one to two years on their installation work, though some premium installers or manufacturer-authorised dealers may offer longer periods. This is separate from the manufacturer's warranty on the unit itself, so it pays to understand both before signing anything.
Labour Warranty vs Product Warranty — What's the Difference?
When you have a heat pump installed, you're actually covered by two distinct warranties:
- Product (manufacturer) warranty — covers the heat pump unit itself, including parts and refrigerant components. This typically runs five to seven years for well-known brands, and some manufacturers offer extended warranties if the unit is installed by one of their authorised dealers.
- Labour warranty — covers the installer's workmanship: the pipework, electrical connections, mounting, drainage, and commissioning. This is what your installer is directly responsible for.
Always ask for both warranties in writing before work begins.
What's a Typical Labour Warranty Period in NZ?
There's no single industry-mandated standard for labour warranties in New Zealand, so periods do vary. As a general guide:
| Installer type | Typical labour warranty |
|---|---|
| Standard installer | 1 year |
| Manufacturer-authorised dealer | 1–2 years (sometimes more) |
| Premium/specialist installer | 2–5 years |
Some manufacturers require installation by an authorised dealer to activate the full product warranty, so it's worth checking this with your supplier before choosing an installer.
Your Rights Under the Consumer Guarantees Act
Regardless of what an installer puts in writing, you have statutory protections under the Consumer Guarantees Act 1993 (CGA). This means the installation work must be carried out with reasonable care and skill, and if it isn't, the installer is obligated to fix the problem — even if their written warranty period has expired, provided a reasonable amount of time hasn't passed.
Consumer NZ has excellent plain-English guidance on your rights under the CGA. If an installer tries to limit your rights beyond what the CGA allows, that limitation is generally unenforceable.
What Should a Labour Warranty Cover?
A solid labour warranty should cover:
- Faulty installation workmanship — e.g., refrigerant leaks caused by poor flaring or connections
- Electrical wiring issues attributable to the installer
- Drainage problems resulting from incorrect fall or pipe routing
- Mounting and bracket failures due to improper fixing
- Commissioning errors — incorrect settings or refrigerant charge
It should be clear in writing what is excluded — for example, damage caused by the homeowner, power surges, or normal wear and tear.
Restricted Work — Who Can Legally Install a Heat Pump?
This is important: heat pump installation involves restricted electrical work and refrigerant handling, both of which are legally regulated in New Zealand.
- Electrical connections must be carried out or supervised by a registered electrician. Check the Electrical Workers Registration Board (EWRB) to verify your installer's registration.
- Refrigerant handling requires an EPA-approved handler under the Ozone Layer Protection Act. Reputable installers will hold this certification.
- The installer must issue a Certificate of Compliance (CoC) for the electrical work. Always ask for this — it's your proof the work was done legally and safely.
If an installer can't provide a CoC or isn't registered, walk away. Unlicensed work may void your product warranty and could create safety hazards.
Tips for Getting the Best Warranty Protection
- Get everything in writing — ask for the labour warranty terms as part of your quote or contract.
- Check if the installer is manufacturer-authorised — this can unlock longer product warranties.
- Ask what happens if something goes wrong — response times, call-out fees within the warranty period, and who to contact.
- Keep your paperwork — warranty documents, the CoC, and any commissioning reports.
- Register your product — many manufacturers require online registration to activate the full warranty period. Check MBIE Building Performance for guidance on building-related compliance if your installation requires consent (some ducted systems may).
- Check Healthy Homes requirements if you're a landlord — heat pumps installed for rental properties must meet specific heating capacity standards under Tenancy Services Healthy Homes.
When to Call a Professional
Always use a qualified, registered heat pump installer for any installation, replacement, or refrigerant-related repair. This isn't just best practice — it's the law for the electrical and refrigerant components involved. A good installer will be happy to show you their EWRB registration, EPA refrigerant handling approval, and any manufacturer authorisations.
You can find qualified local heat pump installers on tradedirectory.co.nz. When comparing quotes, don't just look at price — compare the labour warranty period, what it covers, and whether the installer is manufacturer-authorised.
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