Heat pump servicing and repairs in NZ: cost, what's included and how often

Consumer NZ puts a heat pump's life expectancy at 10 to 15 years, and it works hardest in the months you most need it. Dust on the filters, grime in the indoor coil and a blocked drain all make it work harder for less heat. Some of that you can fix yourself in ten minutes, and some needs a technician. This page covers both, with 2026 prices.

How much does a heat pump service cost in NZ?

Expect to pay about $79–$249 per visit to service a single high-wall or floor console unit. Multi-split systems start around $374 for two indoor units, and ducted systems around $375. Travel, access and a very dirty unit can add to the price.

The spread in single-unit prices usually reflects what's included. A low price may be a filter and cover clean. A higher price should include a deeper clean of the coil and fan, drain treatment and performance checks.

What does a heat pump service include?

A thorough service cleans the filters, indoor coil and fan, clears and treats the condensate drain, cleans the outdoor unit, checks electrical connections and refrigerant pipe insulation, and tests heating and cooling performance. Ask for a written checklist so you know what was done.

• Remove and wash the air filters and clean the indoor unit's covers.
• Clean the indoor coil and fan barrel, where most mould and dust builds up.
• Flush and treat the condensate drain so water doesn't back up or leak inside.
• Clear leaves and debris from the outdoor unit and check its fins and fixings.
• Check electrical connections, the remote and the controls.
• Inspect pipe insulation and trunking for weather damage.
• Run the unit in heating and cooling and check the air temperatures leaving it.

How often should a heat pump be serviced?

Check your manufacturer's warranty terms first, because they are the rule to follow. As a practical guide, many homes book a professional service every year or two, more often for heavily used units, homes with pets or dust, and coastal houses where salt air affects the outdoor unit.

Timing helps. Booking before winter means the unit is clean for the season when it runs most, and technicians tend to be less busy in late summer and autumn than during the first cold snap.

Can I clean heat pump filters myself?

Yes, and it's the most useful maintenance you can do. EECA recommends cleaning filters every couple of weeks in periods of heavy use, using a vacuum cleaner or warm water. Clean filters let air flow freely, so the unit heats better and uses less electricity.

The full walkthrough, including what not to touch, is in how to clean heat pump filters. Pair it with sensible settings from best heat pump settings for winter.

What are the signs a heat pump needs repair?

Call a technician if the unit blows lukewarm air after a filter clean, drips water inside, makes new grinding or rattling noises, smells musty or burnt, shows an error code or flashing light, or trips the switchboard. Don't open sealed parts or touch refrigerant pipework yourself.

• Weak heating. Clean the filters first. If it's still weak, the coil may be dirty or there may be a refrigerant or sensor fault.
• Water leaking indoors. Usually a blocked or poorly sloped condensate drain.
• Ice on the outdoor unit. Some frost is normal in cold weather and the unit defrosts itself. Ice that doesn't clear needs checking.
• Unusual noise. Rattles can be loose panels or brackets. Grinding or squealing can mean fan or motor wear.
• Bad smells. Musty air suggests mould in the coil or drain. A burning smell means switch it off and call someone.
• Error codes. Note the code and model number before calling, as it speeds up diagnosis.

Should I repair or replace an old heat pump?

Replacement is worth pricing when a unit is near the end of the 10 to 15 years Consumer NZ expects a heat pump to last, needs a major repair such as a compressor, or heats a room poorly even when working. Newer units with more stars on the energy label can cost noticeably less to run.

On the Zoned Energy Rating Label, more stars means less electricity for the same heat. Compare the repair quote against a new installed unit, which is about $2,500–$4,800 for a single high-wall. Our heat pump replacement cost guide covers prices and the process, and heat pump prices NZ has the full price bands.