Winter Split System Prep Checklist for Perth Homes

As Perth settles into another cold winter, your split system becomes one of the most relied-on appliances in the home. But if it’s not running efficiently, you could be paying more than you need to stay warm. This winter checklist will help you improve the performance of your split system, reduce running costs, and get the most out of the most energy efficient split system options available in Australia.

Quick Summary: Why Winter Maintenance Matters

• Keep your heating bill under control

• Reduce strain on your split system during high use

• Improve airflow, warmth, and air quality

• Lower your split system cost to run during winter

• Extend the lifespan of your air conditioner

Clean the Indoor Filters for Consistent Heating

During winter, dust buildup in your filters can block airflow and force the unit to work harder. That means your system uses more power to produce less heat, pushing up your energy bill.

To clean the filters:

• Open the front panel of your indoor unit

• Remove the filters and rinse them with lukewarm water

• Let them dry completely before putting them back in

Tip: Clean your filters at least once a month during winter to ensure warm air flows freely and efficiently.

Clear and Check the Outdoor Unit

Even in winter, your outdoor unit plays a key role in heat exchange. When it’s blocked or dirty, performance drops and running costs increase.

What to look for:

• Remove any debris, leaves, or dirt around the unit

• Check that plants and garden beds aren’t too close

• Make sure the unit is sitting level on its base

• Look for signs of corrosion or damage

Proper airflow around the outdoor unit is essential for the most energy efficient split system to operate as it should.

Watch for Signs of Poor Performance

Your unit might be running, but that doesn’t mean it’s working well. If it’s taking longer to heat the room, making odd noises, or emitting a stale smell, it could be costing you more than it should.

Common winter warning signs:

• Weak airflow from vents

• Unusual rattling, buzzing, or clicking

• Mould or mildew odour

• Higher-than-normal power bills

Catching these issues early helps keep your split system cost down and avoids mid-winter breakdowns.

Use Smart Winter Temperature Settings

Even the most energy efficient split system air conditioner in Australia will use more power if it’s set too high. You don’t need to turn your home into a sauna to stay comfortable.

Recommended settings for winter:

• Set the temperature between 19°C and 21°C

• Use the “heat” mode, not “auto” or “dry”

• Keep the fan setting on “auto” for steady airflow

• Use timers to turn the system on just before you wake and off when you leave

Every degree above 21°C adds to your electricity usage. Sticking to the right settings can significantly reduce your split system cost to run during colder months.

Book a Professional Winter Service

A professional service ensures your system is running at full capacity during peak usage. At Air‑Cond Installs WA, we provide winter servicing across Perth to keep your home warm and your energy costs down.

Why servicing matters in winter:

• Detects performance issues before they worsen

• Optimises heat output and energy efficiency

• Keeps your warranty valid

• Helps your system last longer

How Much Does a Split System Cost to Run in Winter?

The cost to run a split system depends on its size, condition, and energy rating. Here’s a general guide for Perth homes using heating mode.