How often should I service my heat pump?

08 November, 2026

A heat pump is one of the best ways to heat and cool a Kiwi home, but like a car, it runs best when it’s looked after. The good news is that keeping it in top shape is simple.

The short answer

Have your heat pump professionally serviced at least once a year. The best time is before winter, so it’s ready when you need it most. If you run your heat pump every day for both heating and cooling, a service every 6 to 9 months will keep it running at its best.

Between services, clean the indoor filters yourself every few weeks during busy months. Most filters simply slide out and can be vacuumed or rinsed. Check your owner’s manual for the right way to do it on your model.

Why servicing matters

Lower power bills. Dust and dirt make your heat pump work harder. A clean unit uses less electricity to heat or cool the same room.
Cleaner air. Filters and coils trap dust, pollen and mould. If they’re not cleaned, your heat pump can blow some of it back into your home.
Fewer breakdowns. Small problems found early are cheaper to fix than a breakdown on the coldest night of the year.
A longer life. A well maintained heat pump lasts longer, so you get more value from your investment.
Protecting your warranty. Many manufacturers require regular servicing to keep the warranty valid, so it’s worth checking your warranty terms.

Signs your heat pump needs a service now

It isn’t heating or cooling as well as it used to
There’s a musty or unpleasant smell when it starts
You can hear new rattling, buzzing or clicking noises
Water is dripping from the indoor unit
Your power bill has gone up for no clear reason
It’s been more than a year since its last service

What happens during a Chillmax heat pump service

Cleaning the filters, coils and fan
Cleaning the drain so water flows away properly
Checking the outdoor unit and clearing leaves and debris
Checking it heats and cools correctly
Checking the electrical connections and controls
For central ducted systems, checking the ductwork in the ceiling, the outlets and the return air grille and filter, so air flows freely to every room
Letting you know about anything that needs attention, before it becomes a bigger problem

Local conditions make a difference

Here in the Manawatū, our heat pumps work hard through cold, damp winters and warm summers. Homes near the coast, on farms or near busy roads can collect salt, dust and debris faster, so they may need servicing more often.

All makes and models

Chillmax services and repairs all makes and models of heat pump, whoever installed them. We look after homes and businesses across Palmerston North, Feilding, Levin, Whanganui, Dannevirke and the wider Manawatū.

Summer is coming. Book your heat pump service now and beat the rush.

Book a Service or call (06) 355 4479