Wall mounted air conditioners are the most common system installed across Perth homes and businesses, and keeping one properly serviced is what determines whether it delivers reliable performance for a decade or more, or starts underperforming and breaking down well before its time.
At AC Installation Perth, we service, maintain, and repair wall-mounted air conditioners across Perth, regardless of the brand or who carried out the original installation.
A wall-mounted unit works continuously through Perth's hot summers and, if reverse cycle, through winter as well. Without regular servicing, performance and efficiency gradually decline — often gradually enough that it's not obvious until you compare a recent power bill to one from a year or two earlier.
Dust and grime build-up on filters, coils, and the fan restrict airflow, forcing the unit to work harder for the same output, which shows up directly in running costs.
Filters and coils can accumulate dust, allergens, and in some cases mould, which matters for households with allergy sufferers or young children.
Most major faults show early warning signs — a failing capacitor, a developing refrigerant leak, a blocked drain — that a technician is likely to catch during a routine service before they cause the unit to fail entirely.
Units that are serviced regularly generally last considerably longer than those only looked at once something's already gone wrong.
A standard service typically includes:
We recommend servicing most residential wall mounted units at least once a year, ideally ahead of summer. Units in coastal areas, where salt air accelerates corrosion of the outdoor condenser, or units used heavily in commercial settings, often benefit from more frequent servicing.
When a wall mounted unit isn’t performing properly, we diagnose the actual cause before recommending a repair. Common issues we see include:
Often caused by low refrigerant (indicating a leak), a dirty filter or coil restricting airflow, or in more serious cases, a failing compressor.
Usually caused by a blocked or disconnected condensate drain line, though can also indicate low refrigerant causing coil icing that later melts and overflows the drain pan.
Can range from a simple remote or power issue through to a failed capacitor, control board fault, or wiring problem.
Rattling, buzzing, or grinding noises often point to loose panels, a failing fan motor, or debris in the outdoor unit.
Musty smells typically indicate mould or bacterial growth in the coil or drain pan, usually resolved with a thorough clean.
We interpret fault codes for most major brands and diagnose accordingly.
Can indicate an incorrectly sized system for the room, a refrigerant issue, or a thermostat or sensor fault.
Usually caused by a blocked filter, dirty blower wheel, or occasionally a failing fan motor.
Let us know whether you need a routine service or you’re experiencing a specific issue.
Our technician inspects the unit, checking components, refrigerant levels, electrical connections, and overall performance.
If a repair is needed, we explain what’s wrong and provide a quote before proceeding, with no obligation to go ahead.
We carry out the work using quality parts suited to your unit’s brand and model.
We test heating and cooling performance before finishing up, confirming the issue is properly resolved.
Older wall-mounted units (typically past 10-12 years old) with a significant fault, such as a failed compressor, are often less economical to repair than to replace, particularly given efficiency improvements in newer models. Younger units with isolated issues — a faulty capacitor, blocked drain, or refrigerant leak — are usually well worth repairing.
We’ll always give you an honest comparison based on your specific unit’s age and condition, rather than defaulting to whichever option happens to be more profitable for us.
We provide servicing, maintenance, and repairs for wall mounted air conditioners across the greater Perth metro area, including the northern suburbs, southern suburbs, eastern corridor, and inner-city precincts, regardless of who installed the unit originally.
At least once a year is recommended for most residential units, ideally scheduled ahead of summer when the system will be working hardest.
Costs vary depending on the number of units being serviced, their condition, and accessibility. We provide a clear quote before any work begins.
Most commonly caused by a blocked or disconnected condensate drain line, though it can also result from low refrigerant causing ice build-up on the coil that later melts and overflows.
This usually indicates the system isn't running efficiently — often due to a dirty filter or coil, low refrigerant, or in some cases an incorrectly sized unit working harder than it should. A service will typically identify the cause.
Start with the basics: check the remote's batteries, confirm the isolation switch is on, and check whether a circuit breaker has tripped. If it still won't power on, the issue is likely electrical or component-related and will need a technician to diagnose.
Yes, we regularly service and repair wall mounted units installed by other companies, provided we can access the necessary information about the unit.
With regular servicing, most wall mounted units last well over a decade, though this depends on usage, environment (coastal areas see faster wear), and the quality of the original installation.
We prioritise getting to breakdowns as quickly as possible, particularly during peak summer periods. Get in touch and we'll do our best to accommodate urgent requests.
Whether your wall mounted unit needs a routine service, isn’t performing the way it should, or has stopped working altogether, our technicians can diagnose the issue and get it sorted quickly. Get in touch to book a service or repair anywhere across Perth.
Contact AC Installation Perth today to book a wall-mounted air conditioner service, maintenance visit, or repair.
