Mitsubishi Heavy Industries Aircon Servicing and Repair
Silverback Aircon specializes in servicing and repairing Mitsubishi Heavy Industries (MHI) air conditioners, we service ALL Mitsubishi Heavy Industries Aircon models. This includes both the Deluxe series and the latest Rocket product line launched in April 2025 that is outfitted with the jet flow technology. This guide will fully detail our Mitsubishi Heavy Industries aircon servicing processes and prices.
Looking for general aircon servicing? See what is included, how often it is needed and how to book.
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Here is a detailed breakdown of what you can expect from Silverback Aircon’s servicing of your MHI unit:
Mitsubishi Heavy Industries Gas Top Up Service
MHI has recently announced launching its multi-split residential aircon models that run on R32 refrigerant gas, which we don’t usually carry in our truck. So you will need to inform us beforehand. Details (process and pricing) of our professional aircon gas top-up services are on this page.
Mitsubishi Heavy Industries Chemical Wash
At Silverback Aircon, we believe in providing servicing solutions that protect your unit’s long-term health. For this reason, we do not recommend a standard chemical wash as a routine cleaning method. Instead, our technicians will typically advise either a comprehensive normal service or a chemical overhaul, depending on your MHI aircon’s condition.
Here’s why:
A standard chemical wash involves spraying a chemical cleaner onto the evaporator coil without dismantling the indoor fan coil unit. This approach has two significant drawbacks:
- Ineffective Cleaning: It cannot thoroughly clean the back of the coil, where dirt and debris heavily accumulate.
- Potential for Damage: The chemical runoff can harm sensitive electrical components within the unit. Furthermore, repeated chemical exposure can gradually corrode the delicate aluminium fins of the coil itself and leave behind residues that are impossible to remove completely, ultimately reducing your air conditioner’s efficiency and lifespan.
Our recommended services are designed to clean your MHI aircon deeply and safely, without these risks.
While we are always here for one-off repairs, the most cost-effective and reliable way to protect your Mitsubishi Heavy Industries air conditioning investment is through a scheduled servicing contract. Here’s why it’s beneficial for you:
Prevents Major Breakdowns
Regular maintenance is like a health check-up for your aircon. We identify and fix small issues—like minor refrigerant leaks, clogged drainpipes, or wearing components—before they escalate into complete system failures and expensive repairs.
Maintains Peak Efficiency & Lowers Bills
Over time, dirt buildup on filters and coils forces your unit to work harder to cool your space. A servicing contract ensures your system is cleaned and tuned regularly, restoring its energy efficiency and preventing a gradual rise in your monthly electricity bills.
Extends System Lifespan
Consistent care reduces wear and tear on critical components like the compressor. A well-maintained unit doesn’t have to strain, which can add years to its operational life, delaying the need for a costly full replacement.
Priority Scheduling and Peace of Mind
With a contract, you become a priority client. You get scheduled service at your convenience, and you have the assurance that expert technicians are proactively managing your system’s health, giving you one less thing to worry about.
In short, a servicing contract is a proactive strategy that saves you money on energy and repairs in the long run while guaranteeing consistent, reliable cooling.
OUR TESTIMONIALS
Silverback Aircon installs both the Deluxe and the newer Rocket multi-split systems from Mitsubishi Heavy Industries. Both MHI series have compressors with capacities that can power up to system 4 configurations.
Even with their reputation for robust engineering, Mitsubishi Heavy Industries air conditioners can develop issues over time, especially without regular maintenance. At Silverback Aircon, our specialized experience with the MHI brand means we efficiently diagnose and resolve these common problems. Here are some of the most frequent MHI repair issues we encounter:
1. Water Leaking from the Indoor Unit
This is one of the most common service calls. For MHI units, this is typically caused by:
A Clogged Drainpipe
Dust and algae buildup can block the condensate drain line, causing water to back up and overflow from the indoor unit. This can easily cause bad odor in your aircon.
A Displaced or Cracked Drain Pan
The drain pan, which collects condensation, can become misaligned during cleaning or develop cracks over time.
A Dirty Air Filter
A severely clogged filter restricts airflow over the evaporator coil, causing it to freeze up. When the ice melts, it overflows the drain pan.
2.Weak Airflow or Reduced Cooling
If your MHI unit is running but not cooling effectively, the culprit is often:
Clogged Air Filters & Evaporator Coils
Restricted airflow is the primary enemy of cooling efficiency. Dirty filters and coils prevent cold air from circulating properly.
Low Refrigerant Gas
A leak in the sealed refrigerant system will reduce cooling capacity. Meanwhile, our technicians are trained to perform a thorough leak test and repair it before recharging the system with the correct MHI-specified refrigerant.
A Failing Blower Fan Motor
The motor that powers the indoor fan can wear out, leading to weak airflow from the vents.
3.Unusual Noises (Buzzing, Rattling, or Grinding)
MHI units are known for quiet operation, so any new aircon noise is a clear indicator of an issue.
- Rattling: Often points to a loose part within the casing, a loose fan blade, or debris in the outdoor unit.
- Buzzing: Can indicate an electrical problem, such as a failing compressor or an issue with the contactor in the outdoor unit.
- Grinding: Typically suggests a serious mechanical fault, often with the fan motor bearings in either the indoor or outdoor unit, requiring immediate attention.
4. Unit Not Turning On or Tripping the Circuit Breaker
Tripping Breaker: This is frequently caused by a short circuit in the wiring, a failing compressor drawing too much power, or a moisture-related electrical fault.
Unit Unresponsive: Could be due to a faulty remote control, a blown internal fuse, a malfunctioning PCB (the main control board), or a problem with the power supply itself.
Why Choose Silverback for Your MHI Repairs?
Many of these issues stem from a lack of regular servicing. But our team’s specific training on Mitsubishi Heavy Industries systems, combined with our stock of common MHI-compatible parts, allows us to correctly diagnose and resolve these problems efficiently, restoring your comfort with minimal delay.
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To replace failing parts of your MHI system, you can trust us to have a good inventory of well-maintained and fully functioning MHI aircon spare parts. We can also expertly advise on aircon replacement, if that’s a more cost-effective approach for your situation.
Why should I choose Silverback Aircon for my MHI servicing and repair?
At Silverback Aircon, we specialize in the servicing and repair of Mitsubishi Heavy Industries systems. Furthermore, our technicians are specifically trained and equipped with the right tools and genuine parts to efficiently diagnose and fix MHI units. And most importantly, we pride ourselves on our technical expertise, transparent pricing, and commitment to getting your cooling system back to optimal performance with minimal disruption.
