Usually worth repairing
Most faults at this age are parts like fan motors, sensors or controllers.
Our usual advice: Repair, service and keep using it. Repairs →
Mortdale NSW 2223
Air Conditioning Mortdale Is Your Ducted System Tired?
Plenty of Mortdale homes had ducted air conditioning fitted fifteen or twenty years ago. Those systems are now reaching the age where cooling drops off, power bills creep up and the question becomes: fix it or replace it?
Updated October 2026
Air conditioning in Mortdale often means an ageing ducted system. After fifteen years or more, ductwork can split or sag, zone motors fail and older compressors use far more power than modern inverters. We inspect the whole system, including the roof space, and tell you straight whether a repair is worth it. Our team has fixed and replaced ducted systems in Sydney's south since 1989.
Ageing ducted systems
Signs Your Mortdale Ducted System Is Wearing Out
One of these on its own may be a simple fix. Several together usually point to a bigger problem.
- Some rooms barely get airOften a split, crushed or disconnected duct in the roof.
- Zones stop respondingZone motors and dampers wear out over time.
- Longer run timesThe system takes ages to reach temperature on hot days.
- Higher power billsOlder fixed-speed compressors draw much more power.
- Dusty ventsCan mean leaks in the return air path pulling roof dust in.
- Old refrigerantSystems running R22 are expensive to recharge and repair.
Repair or replace
Repair or Replace? Ducted Air Conditioning Decisions in Mortdale
An honest assessment, based on what we find in your roof.
Depends on the fault
A small repair can make sense, but major compressor work often does not.
Our usual advice: We compare the repair cost with a new system and show you both.
Often time to replace
Efficiency, parts availability and reliability all decline.
Our usual advice: Replace the unit, and reuse sound ductwork where we can. Ducted →
Fix the ducts either way
A new unit cannot perform through leaking or crushed ducts.
Our usual advice: Repair or replace the affected duct runs at the same time.
Mortdale services
Ducted and Split Air Conditioning Services in Mortdale
Specialists in getting older ducted homes running properly again.
Ducted inspections
Unit, ducts, zones and controls checked.
Inspections →Ductwork repairs
Split or crushed ducts replaced.
Ductwork →Ducted replacements
New Daikin inverter ducted units.
Ducted →Zoning upgrades
AirTouch 5 control for each zone.
AirTouch 5 →Splits for extra rooms
Covering areas the ducts miss.
Splits →Ducted servicing
Filters, coils and airflow checked.
Servicing →
Mortdale FAQs
Mortdale Ducted Air Conditioning Questions
How long does ducted air conditioning last?
Around 15 to 20 years with regular servicing. After that, efficiency and reliability usually drop and parts get harder to find.
Can I keep my existing ductwork with a new unit?
Often, if it is in good condition and sized correctly. We inspect it first and replace any runs that are damaged or undersized.
Why are some rooms hot while others are fine?
Common causes are a disconnected or crushed duct, a failed zone damper or a system that was undersized from the start.
My system uses R22 gas. Should I replace it?
R22 has been phased out, so recharges are costly. If an R22 system needs a major repair, replacement is usually the better value.
How long does a ducted replacement take?
Most standard replacements take one to two days, depending on how much ductwork needs changing.
What licences do your ducted technicians hold?
They work under our ARC refrigerant licence AU54289 and NSW contractor licence 329810C.
Around Mortdale
Other Suburbs Near Mortdale
We service ducted homes right across this part of St George.
Penshurst 2222Oatley 2223Peakhurst 2210Lugarno 2210Hurstville 2220Peakhurst Heights 2210
Mortdale bookings
Get a Straight Answer on Your Ducted System
Book a ducted inspection and a licensed technician will show you the options and quote a fixed price for whichever you choose.
Roof-space checks not guesses
Fixed quotes* for each option
Honest advice repair or replace
*Call-out, travel and quote visit fees can vary depending on the job and where you are. We'll confirm any costs with you when you book, before any work starts.
Sydney coastal climate specialists providing whisper-quiet, energy-efficient ducted and split system air conditioning solutions engineered for residential comfort.
AREAS WE SERVICE
Licensed local technicians and an Authorised Daikin Specialist Dealer across Sydney, backed by a lifetime workmanship warranty.
Air Conditioning Sutherland Shire
Air Conditioning Eastern Suburbs
Direct Line: 1300 156 466
Licence: ARC Lic #AU54289 | NSW Contractor #329810C
© 2026 Alpha & Omega Air Conditioning Services. All Rights Reserved. Fully Licensed & Insured.