AIR CONDITIONER REPAIRS AND SERVICE — MELBOURNE

 

Split System Air Conditioner Not Heating?

We’ll Find the Problem and Fix It!

Whether your split system air conditioner won't turn on, is not blowing warm air in heating mode, making strange noises, or showing a fault code — our licensed technicians diagnose the exact cause and provide honest repair options. Serving Melbourne's inner and north-western suburbs since 1998.

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HERE'S A LIST COMMON ISSUES WE ARE ASKED TO FIX EVERYDAY

Air conditioner running but not heating in heat mode

The unit is on, the fan is blowing, but the air coming out is not warm in heating mode — the room isn't increasing in temperature no matter how long it runs.

COMMON CAUSES:

Low refrigerant from a slow leak, dirty outdoor coil preventing heat rejection, failed or weak compressor, blocked return air filter severely restricting airflow, faulty expansion valve.

Ice forming on indoor unit or pipes

You can see ice or frost building up on the outdoor unit, the copper pipes, or the outdoor unit. The system may stop heating entirely when this happens.

COMMON CAUSES:

Heavily blocked return air filter causing restricted airflow, low refrigerant from a leak, faulty fan motor reducing airflow, low ambient temperature operation ( System in normal DEFROST MODE ), blocked indoor coil.

Water dripping or leaking outside

Water is dripping from the outdoor unit could be a normal occurrence if system is in defrost mode.

COMMON CAUSES:

If problem becomes a constant issue it could be blocked condensate drain (most common), dirty outddor coil to ice up and then defrost rapidly, incorrect installation pitch, cracked or overflowing drain tray. Act promptly to prevent water damage.

Air conditioning not reaching set temperature

The system runs continuously but never reaches the temperature you've set. Your electricity bill is climbing but your home isn't warming up.

COMMON CAUSES:

Refrigerant leak reducing system capacity, dirty outdoor coil making heat rejection inefficient, undersized system for the space, poor insulation, blocked filters reducing airflow by 15–30%.

Weak or reduced airflow from vents

Air is coming from the vents but the flow feels noticeably weaker than usual — the room takes much longer to cool and some areas don't cool at all.

COMMON CAUSES:

Blocked return air filter (the single most common cause of weak airflow), failing indoor fan motor, blocked or collapsed ductwork, dirty indoor coil restricting airflow, closed zone dampers.

Air conditioner running but electricity bills spiking

The system seems to be working normally but your power bills have increased significantly — the unit is consuming far more energy than it used to.

COMMON CAUSES:

Dirty filters making the system work harder, low refrigerant causing compressor to run at higher load, dirty coils reducing efficiency, ageing compressor losing efficiency, refrigerant leak.

Flashing lights or fault code displayed

Your indoor unit is displaying a flashing LED pattern or error code on the controller. The system has stopped operating and won't restart.

COMMON CAUSES:

Varies by brand and code — can indicate refrigerant faults, sensor errors, communication faults between indoor and outdoor units, PCB failures, or overheating. Codes guide diagnosis but on-site testing is always required. Don't just reset — find the cause.

Smells coming from the air conditioner

Musty, mouldy, chemical or burning smells coming from the unit when it operates — the air quality feels worse when the system is running.

COMMON CAUSES:

Musty/mouldy — mould or bacteria on the indoor coil (very common, treated with our premium service). Burning — electrical fault or failing motor. Chemical — refrigerant leak. All persistent smells warrant investigation.

Split system won't turn on at all

You press the remote or wall controller and get no response — no fan, no startup sound, nothing. The unit appears completely dead.

COMMON CAUSES:

Tripped circuit breaker or blown fuse (check your switchboard first), failed control PCB, power supply fault at the unit, remote control battery or pairing issue, protection mode activation after a fault.

Loud or unusual noises

Rattling, squealing, grinding, banging or hissing sounds coming from the indoor or outdoor unit during operation — sounds that weren't there before.

COMMON CAUSES:

Rattling — loose panels or debris. Squealing/grinding — failing fan motor bearing. Banging — loose or damaged fan blade. Hissing — possible refrigerant leak. Gurgling — low refrigerant or refrigerant in liquid line. Each sound points to a different component.

I can see black mould in the indoor unit

Seeing black mould inside your indoor AC unit (split system) is fairly common in Melbourne’s humid periods, but it does need to be dealt with properly because it can spread spores through the air every time the unit runs.

COMMON CAUSES:

The main causes are constant moisture inside the unit during operation,dust feeding the mould from unclean filters & drainage issues. In cases where mould has been found we recommend a premium air conditioning service.

System overdue for servicing

Your air conditioner is working but hasn't been professionally serviced in over two years — or you've never had it serviced since moving in.

COMMON CAUSES:

Getting your air conditioner serviced isn’t just “maintenance for the sake of it” — it directly affects air quality, running costs, reliability, and lifespan of the system.

What’s Included in our

Standard Air Conditioner Service

FAQ

Air Conditioner repairs — your "Not Heating" questions answered

This is the most common complaint we receive in winter. The most likely causes are low refrigerant from a slow leak, a dirty outdoor coil that can’t absorb heat properly, or a blocked return air filter severely restricting airflow. Less commonly it’s a failing compressor or a faulty expansion valve. Because several different faults produce identical symptoms, an on-site diagnostic is always needed to identify the exact cause before any parts are replaced or refrigerant is added.

Outdoor water leaks are almost always caused by a blocked condensate drain, which overflows in defrost mode. When the drain can’t remove water fast enough, it overflows into the area around the outdoor unit. They can also occur when a dirty outdoor unit causes the outdoor coil to ice up — when the ice melts, it overwhelms the drain. Address this promptly as water damage can be expensive to repair.

Error codes mean the system has detected a fault and has shut down a safety function. Different brands use different codes — Daikin, Mitsubishi, Fujitsu and others all have their own diagnostic systems. The codes help our technicians narrow down the affected component, but on-site testing is always needed to confirm the fault. Simply resetting the error without finding the underlying cause will result in the fault returning, often at a worse time.

Systems under 10 years old are generally worth repairing unless the compressor has failed — a compressor replacement on an older system often isn’t economical. For systems over 12–15 years with recurring faults or failed compressors, replacement may be more cost-effective in the long run. We take a repair-first approach and will always give you an honest assessment — we won’t push you toward replacement if repair is the better option for your situation and budget.

A musty smell is caused by mould or bacteria growing on the indoor coil and in the drain tray — this is extremely common, particularly in systems that aren’t serviced regularly or are operated in humid conditions. Our premium service includes a high-pressure wash of the indoor coil and fan blades plus a microbial treatment that kills mould and bacteria and prevents regrowth. It also includes a deodourisation treatment to remove the smell.

For residential split systems and ducted systems, we recommend servicing every one to two years. For commercial systems in continuous or heavy use, every three to six months. Regular servicing maintains efficiency, catches developing faults before they become breakdowns, and keeps the system clean — a well-serviced system uses significantly less electricity than a neglected one.

Our diagnostic assessment includes up to 30 minutes on-site to accurately identify the fault. A full service for a functioning heater is charged at a fixed, capped price. Repair costs vary depending on the fault, with labour charged per 30 minutes and parts quoted separately. We always provide a clear, itemised quote before any repair work begins. View our full pricing page for complete details.

Yes — we repair and service all types of refrigerated air conditioning systems including wall-mounted split systems, multi-head systems, ducted reverse cycle systems, cassette units, and commercial VRV/VRF systems. We service all major brands including Daikin, Mitsubishi Electric, Mitsubishi Heavy Industries, Fujitsu, Panasonic, LG, Samsung, ActronAir and more.

All bookings are made through our online booking portal, available 24 hours a day, 7 days a week. You can view live appointment availability, confirm your service area and book instantly without waiting for a callback. You can also call us directly on 1300 30 90 30 during business hours.

Book online 24/7

CAPPED PRICE AIR CONDITIONER SERVICE

Our Standard Service option addresses the most common causes of reduced performance and covers all key system components. Our premium service adds a high-pressure deep clean for systems with mould, odour or heavily soiled coils.

$340
  1. Filter clean
    Remove, clean or replace return air filters
  2. Indoor coil check
    Inspect and clean indoor refrigeration coil
  3. Outdoor coil clean
    Check and clean outdoor coil and remove debris
  4. Refrigerant pressure check
    Verify refrigerant gas pressures are correct
  5. Gas pressure check
    Verify and adjust inlet and manifold pressures
  6. Electrical connections
    Check and tighten all electrical connections
  7. Condensate drain
    Check and clear condensate drainage system
  8. Thermostat & controls
    Test thermostat accuracy and control circuit
  9. Fan & airflow
    Check fan motor, blade and air distribution
  10. Outdoor unit check
    Inspect for stability, damage and obstruction
  11. Performance test
    Operate and verify cooling and heating output