Mitsubishi air conditioning repairs & service in Sydney
There are two separate Mitsubishi air conditioning makers — Mitsubishi Electric and Mitsubishi Heavy Industries — and we repair and service both across Sydney. An ARC-licensed technician finds the real fault, reads the controller and gets you cooling again. Not sure which one you have? We'll help you check. Need it sorted today? See our air conditioning repairs in Sydney.
We answer 24/7 — talk to a real Sydney technician, not a call centre.
Mitsubishi Electric or Mitsubishi Heavy Industries?
It's a common mix-up: "Mitsubishi" air conditioners are made by two separate companies that have been independent since 1921. They share the name and the three-diamond heritage, but the equipment, controllers and parts are different. We service both — so whichever one you have, you're in the right place. Check the badge on the indoor unit or the data plate if you're not sure, and tell us when you call.
Mitsubishi Electric
The maker of the Mr Slim split and ducted range and City Multi commercial VRF. Common in homes, offices and shops across Sydney.
Mitsubishi Heavy Industries
Sold in Australia by MHIAA — split systems, ducted and commercial VRF. A separate company with its own controllers and spare parts.
Do you repair Mitsubishi air conditioning?
Yes — we repair and service both Mitsubishi Electric and Mitsubishi Heavy Industries air conditioning across Sydney, for homes, offices, shops and venues. We're an independent ARC-licensed repairer; we are not an authorised agent of either company unless expressly stated.
From a Mr Slim or MHIAA wall split that's stopped cooling to a City Multi or commercial VRF system throwing a controller fault, we diagnose to the cause rather than swapping boards on a guess. We read the controller, confirm the fault and fit the right parts for your unit. Where a genuine part is on long back-order, we'll offer a quality manufacturer-approved equivalent and tell you exactly what we're using — your call.
Mitsubishi systems we service
- Wall-mounted splits (Electric & Heavy)
- Ducted systems
- Mr Slim (Electric)
- City Multi & commercial VRF
- Cassette & ceiling-suspended heads
- Controllers — Mr Slim & MHIAA, wired & wireless
- Inverter / PCB faults
- Refrigerant leak detection & recharge
Looking for the wider service rather than a single brand? See our commercial & domestic air conditioning, or keep it running with scheduled air conditioning maintenance.
Mr Slim, City Multi & VRF for Sydney businesses
Commercial Mitsubishi is where our refrigeration side genuinely helps — the same ARC-licensed team that keeps your cold rooms running also services your air conditioning, so a breakdown mid-trade is one call, one team and minimal downtime.
Mr Slim cassette & ducted
Ceiling cassettes and ducted Mr Slim keeping cafes, restaurants and shops comfortable through service — repaired and serviced to hold temperature through the heat.
City Multi & VRF
City Multi and other VRF plant across offices and multi-tenanted buildings — controller faults, communication errors and zone problems diagnosed to the cause.
Refrigeration crossover
The team that repairs your cool & cold rooms and commercial refrigeration also handles your Mitsubishi AC — with a genuine 24/7 breakdown line.
Common Mitsubishi air conditioning faults we fix
If you're seeing any of these — on a Mitsubishi Electric or a Mitsubishi Heavy Industries unit — book a check before the next hot spell. Most are repairable, often same-day where we can.
Not cooling or blowing warm
Often low refrigerant from a leak, a dirty coil or a sensor fault. We find the cause first, then recharge to spec.
Fault code on the controller
The controller or unit shows an error code or LED flash pattern. Mitsubishi Electric and Heavy Industries use different code systems — the same code can mean different things — so we identify the maker and model first, read it on-site, and fix the cause, not just reset it.
Inverter / PCB faults
The unit trips, restarts or won't start — frequently an inverter board, capacitor or fan-motor issue we diagnose to the part.
Leaking water indoors
A blocked condensate drain or a failed drain pump pooling under a cassette or ducted head. We clear it and check the fall.
Noise or poor airflow
Rattling, buzzing or weak airflow — usually a fan motor, bearing or a filter and coil overdue for a clean.
Won't restart straight away
Most splits have a built-in ~3-minute restart delay that protects the compressor — that's normal, not a fault. If it still won't cool after a few minutes, book a check.
Mitsubishi spare parts & service in Sydney
We source and fit the right spare parts for your Mitsubishi — PCBs, thermistors, drain pumps, fan motors, controllers and filters — backed by a 12-month parts warranty. Tell us whether it's a Mitsubishi Electric or Mitsubishi Heavy Industries unit and the model so we bring the correct parts. Most current Mitsubishi splits — Mr Slim and MHIAA — run on R32 refrigerant, which by law only an ARC-licensed technician can handle and recover; that's us (ARC L057415).
An air conditioner should be serviced about once a year to keep airflow strong, power bills down and breakdowns rare — and many warranties require annual maintenance by a licensed contractor to stay valid. One useful thing to know: most modern split systems have a built-in ~3-minute delay before the compressor restarts after it stops, which protects the compressor and is completely normal.
What will it cost? We diagnose the fault first and quote upfront — you approve the price before any work starts, so there are no surprises on the invoice.
Want it covered before summer? Book air conditioning maintenance & servicing, or for a system that's down right now, call our 24/7 breakdown service.
Looking for air conditioning repairs, not just Mitsubishi?
We work on all makes and models — and cover the whole system, not just the badge.
Run a different system? We also service Daikin air conditioning repairs and Fujitsu / General air conditioning repairs the same way. See all brands.
Trusted by Sydney businesses & homes
Rated 4.9 across 12 Google reviews — here are a few in our customers' own words.
"This is the second time that we have used this company… an upgrade of our undercounter bar refrigeration system and… a service of our 2 air conditioning systems. On both occasions we have found Chris's team to have been prompt, professional and efficient for a reasonable price. They are on my preferred company to use for any refrigeration or air con matters…"
"Chris arrived promptly… provided a detailed report. The price was fair… polite and professional. Even took the time to explain how to better use the system. Cleaned up after they'd finished."
"…called ahead… on time, professional, they removed the old air con and cleaned up after themselves, taking all the rubbish away. They installed the new Air con, tested it and showed us how to operate…"
Mitsubishi service questions
Do you repair Mitsubishi air conditioning?
Mitsubishi Electric or Mitsubishi Heavy Industries — how do I know which I have?
Do you stock Mitsubishi spare parts?
How often should a Mitsubishi air conditioner be serviced?
Are you an authorised Mitsubishi dealer?
My Mitsubishi smells musty or mouldy when it runs — can you fix that?
In winter my outdoor unit ices up or keeps stopping to "defrost" — is it broken?
My Mitsubishi is showing a fault or error code — what should I do?
Mitsubishi Electric, Mitsubishi Heavy Industries and their respective logos are trademarks of their respective owners — two separate companies. Active is an independent repair and service provider, not affiliated with or an authorised agent of Mitsubishi Electric or Mitsubishi Heavy Industries (MHIAA) unless expressly stated.
Mitsubishi not cooling?
Tell us whether it's a Mitsubishi Electric or Mitsubishi Heavy Industries unit, the model and any error code — a licensed Sydney technician will diagnose it and quote upfront before any work starts. Mitsubishi air conditioning repairs near you, across Greater Sydney.
No obligation · We reply promptly · 24/7 for emergencies