Heat pumps are NZ's most popular home heating and cooling solution — and like any appliance, they need maintenance and occasional repair. Here's what heat pump repairs cost in NZ in 2026.
Heat Pump Repair Cost NZ 2026
| Service | Typical NZ cost |
|---|---|
| Call-out / diagnosis fee | $100–$200 |
| Annual service (clean + check) | $120–$250 |
| Refrigerant (gas) top-up — minor recharge | $200–$500 |
| Refrigerant recharge — full (leak found and repaired) | $400–$1,200 |
| Refrigerant leak detection (electronic) | $150–$400 |
| PCB / control board replacement | $400–$1,200 |
| Fan motor replacement | $300–$800 |
| Capacitor replacement | $150–$400 |
| Compressor replacement | $800–$2,500+ |
| Thermistor / sensor replacement | $150–$350 |
| Drain pump replacement | $200–$500 |
| Full repair (labour + parts, major fault) | $500–$2,000 |
All prices GST inclusive. Auckland 10–20% above. Prices vary by brand, fault type, part availability, and whether refrigerant work is required (which needs an EPA-licensed refrigerant handler).
Common Heat Pump Faults in NZ Homes
Not Heating or Cooling Adequately
Possible causes: - Dirty filters (DIY fix — clean monthly) - Low refrigerant (gas leak — requires licensed technician) - Dirty outdoor coil (service clean required) - Fault with reversing valve (refrigerant circuit) - Undersized unit for the space
DIY check first: Clean or replace the filters — a blocked filter is the most common cause of reduced performance. Many NZ homeowners never clean their filters; a clogged filter can reduce output by 25–40%.
Error Codes on the Display
Most modern heat pumps display fault codes when a problem is detected. Common codes relate to: - Communication errors between indoor and outdoor units - Temperature sensor failures - Fan motor faults - Refrigerant pressure issues
Don't ignore error codes — they often indicate an early-stage fault that's cheaper to fix than a failure. Note the code and share it with your heat pump technician when calling.
Leaking Water Inside
Indoor unit dripping water: Usually a blocked condensate drain. Condensation from the indoor unit drips into a drain pan and out through a drain line — if this blocks (algae, debris), water overflows inside.
Fix: A technician can clear the drain line — typically part of a service visit. Cost: included in service, or $80–$150 if a separate call-out.
Noisy Operation
- Rattling: Loose panel or foreign object in outdoor unit (leaf, debris)
- Grinding/scraping: Fan blade damage or bearing wear
- Gurgling/bubbling: Normal refrigerant sounds on startup — usually not a problem
- Loud compressor: May indicate refrigerant issues or compressor wear
Heat Pump Not Turning On
- Check power at the wall (isolator switch, circuit breaker)
- Check remote battery
- Wait 3–5 minutes after a power cut — many units have a restart delay
- Check for error code display
If none of these resolve it: a technician fault diagnosis is needed.
Refrigerant (Gas) — What You Need to Know
NZ heat pumps use refrigerant gases (R32 is the modern standard; older units use R410A or R22). Refrigerant work is EPA-regulated — only a person with an EPA refrigerant handling licence can legally purchase or handle refrigerant in NZ.
Signs of a refrigerant leak: - Heat pump blowing lukewarm air despite running (not heating/cooling effectively) - Ice forming on the outdoor unit - Hissing sound from the outdoor unit - Higher electricity bills with same usage
A refrigerant top-up without finding and fixing the leak is a short-term fix — the refrigerant will leak again. A good technician will find the leak, repair it, and then recharge the system.
R22 refrigerant: Older heat pumps (pre-2010) may use R22 refrigerant, which is being phased out globally. R22 is now expensive and increasingly hard to source in NZ — if your R22 system has a refrigerant leak, replacement is often more cost-effective than repair.
When to Repair vs Replace
| Scenario | Recommendation |
|---|---|
| Unit under 8 years old, minor fault | Repair — good value |
| Unit 8–12 years old, major fault (compressor) | Compare repair cost vs new unit price carefully |
| Unit 12+ years old, any significant repair | Replace — unit is past mid-life |
| R22 refrigerant system with leak | Replace — R22 is being phased out |
| Multiple faults in 2 years | Replace — reliability declining |
| Repair cost > 50% of new unit price | Replace |
A new 2.5kW heat pump (small room) costs $1,200–$2,000 installed. A new 5kW (lounge) costs $2,000–$3,500 installed. If a repair quote is approaching 50% of a replacement cost, replacement often makes more sense — particularly on older units.
Annual Servicing — Worth Doing
An annual service extends heat pump life, maintains efficiency, and catches early faults before they become expensive: - Filter clean (or replacement) - Indoor and outdoor coil clean - Refrigerant pressure check - Electrical connection check - Drain line clear
Cost: $120–$250 per unit. For a home with 2–3 heat pumps, service contracts are often available at a discount.
Finding a Good Heat Pump Technician in NZ
Heat pump repair requires specific refrigerant handling licences — not just a general electrician.
What to look for: - EPA-licensed refrigerant handler - Brand authorisation (Mitsubishi Electric, Daikin, Fujitsu, Panasonic all have authorised service networks) - Written fault diagnosis before committing to parts
Find heat pump technicians: Heat Pump Technicians NZ | Post Your Job Free
Frequently Asked Questions
How much does it cost to service a heat pump in NZ? Annual service (clean, check, refrigerant pressure check): $120–$250 per unit. Service contracts for 2–3 units: $300–$500/year. Regular servicing extends life and maintains efficiency — worth doing annually.
Why is my heat pump not heating properly in winter? The most common causes: dirty filters (clean first), low refrigerant, or a dirty outdoor coil. Check and clean your filters — this is a DIY task. If filters are clean and the unit is still underperforming, call a heat pump technician for a diagnosis. Low refrigerant (a gas leak) is the next most common cause.
How long do heat pumps last in NZ? Typical life: 12–18 years. Major brands (Mitsubishi, Daikin, Fujitsu) tend to have the longest service lives and best parts availability. Regular annual servicing extends life. Budget for replacement after 15 years.
Does my heat pump need a gas recharge in NZ? Heat pumps are sealed systems — they should NOT need regular gas top-ups. If refrigerant is low, there is a leak that needs to be found and repaired. Be wary of technicians who offer a "top-up" without finding the leak — the refrigerant will simply leak out again.
Related: Heat Pump Installation Cost NZ | Electrician Cost NZ | Heat Pump Servicing Cost NZ