Mitsubishi Aircon Servicing Singapore
Professional servicing for all Mitsubishi Electric and Mitsubishi Heavy Industries models. From Starmex multi-splits to SRK wall-mounted units, our direct technicians handle it all.
Singapore's Favourite Aircon Brand, Serviced Right
Mitsubishi Electric's Starmex is the most installed aircon system in Singapore homes. You'll find it in HDB flats, condominiums, and landed properties across the island. The Starmex multi-split design — where one outdoor unit powers multiple indoor units — makes it the go-to choice for Singapore's housing layout. But this connected system also means that problems with one component can affect the entire setup.
Our technicians have serviced thousands of Starmex systems since Billy Aircon was founded in 2003. We understand the unique engineering of Mitsubishi Electric's multi-split architecture, including the branch box wiring, communication protocols between indoor and outdoor units, and the specific refrigerant requirements for each generation of Starmex systems.
We also service Mitsubishi Heavy Industries (MHI) models, including the SRK and SRF series. While both carry the Mitsubishi name, they are entirely different companies with different parts, error codes, and service procedures. Our team knows the differences and carries compatible parts for both brands.
Our Mitsubishi Aircon Services
Complete care for Starmex, Mitsubishi Electric, and Mitsubishi Heavy Industries systems.
General Servicing
Complete filter cleaning, coil wash, drain flush, and performance check for each Starmex indoor unit.
From $50/unit →Chemical Wash
Deep chemical cleaning of Starmex evaporator coils, blower fan, and drain pan. Eliminates mould buildup common in Singapore's humidity.
From $80/unit →Gas Top-Up
R410A refrigerant top-up for Starmex and MHI systems. We check the entire refrigerant circuit for leaks before topping up.
From $80/unit →Repair & Diagnostics
PCB board repair, fan motor replacement, branch box troubleshooting, and error code diagnosis for all Mitsubishi models.
Diagnosis from $60 →Installation
New Starmex system installation with proper branch box setup, piping, and commissioning for HDB, condo, and landed homes.
Get a quote →Full Price List
Transparent pricing for all Mitsubishi aircon services. No hidden fees — see our complete rate card.
View prices →Common Mitsubishi Aircon Problems We Fix
Starmex systems are reliable, but these are the issues we see most often in Singapore homes.
One Indoor Unit Not Working While Others Run Fine
This is the most common Starmex issue we encounter. In a multi-split system, one indoor unit may stop cooling while the others work normally. This is usually caused by a faulty branch box, communication wire issue, or a specific indoor unit's PCB board failure. We trace the fault systematically through the Starmex branch circuit to pinpoint the exact component.
Blinking Timer Light (Error Code)
Mitsubishi Electric units use a blinking timer light to signal error codes. The number of blinks corresponds to specific faults — for example, 2 blinks may indicate a thermistor issue, while 5 blinks could mean a compressor overload. Unlike Daikin, Mitsubishi error codes require counting the blink sequence, which our technicians do routinely.
Outdoor Unit Noisy or Vibrating
Starmex outdoor condensers can develop vibration issues over time, especially on HDB corridors and aircon ledges. Loose mounting brackets, worn compressor cushions, or a failing fan motor bearing are common causes. We tighten mountings, replace rubber grommets, and lubricate bearings to restore quiet operation.
Ice Formation on Evaporator Coil
Starmex indoor units can develop ice on the evaporator coil when the system is low on refrigerant or the airflow is restricted by dirty filters and coils. In Singapore's humidity, this quickly leads to water leaking from the unit. We defrost the coil, clean the entire indoor unit, and check gas levels to prevent recurrence.
Mitsubishi Aircon Servicing Prices
Transparent pricing for Starmex and all Mitsubishi models. Multi-unit packages available.
Mitsubishi Aircon Servicing FAQ
We recommend servicing your Mitsubishi Starmex aircon every 3 months. The Starmex system's multi-split design means each indoor unit collects dust independently, so regular servicing keeps all units running efficiently and prevents uneven cooling across rooms. For households that use aircon heavily (12+ hours daily), every 2 months is ideal.
A blinking light on your Mitsubishi unit indicates an error code. The operation light blinking usually means a sensor issue, while the timer light blinking points to a communication error between indoor and outdoor units. Count the number of blinks in one sequence — our technicians can decode the exact fault code and troubleshoot accordingly on-site.
General servicing for Mitsubishi Starmex starts from $50 per unit. Chemical wash starts from $80 per unit. Most Starmex homes have 3-4 indoor units, and we offer multi-unit packages for better value. See our full price list for detailed rates including all multi-unit discounts.
Yes, they are two separate companies with different aircon product lines. Mitsubishi Electric makes the popular Starmex series widely used in Singapore. Mitsubishi Heavy Industries (MHI) makes the SRK series. We service both brands — the general servicing process is similar, but they use different parts, error code systems, and PCB boards. Always let us know which brand you have when booking so we bring the right parts.
In most cases, yes. Starmex multi-split systems allow individual indoor unit replacement as long as the new unit is compatible with your existing outdoor condenser. We check the outdoor unit capacity, refrigerant type, and model compatibility before recommending a replacement. This saves you the cost of replacing the entire system when only one unit has failed beyond repair.
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