Ductless mini-split air conditioners are rising in popularity. These units offer better energy efficiency and reliable heating and cooling, making them a great choice for room additions, conversions, and homes without ductwork in place.
Learn the early warning signs and causes of mini-split system failure, how to prevent minor issues from becoming major malfunctions, and why Hoover Electric, Plumbing, and Heating is your go-to mini-split repair team in the Clarkston, MI area.
How a Mini-Split System Works (In Simple Terms)
To understand common mini-split system problems, it’s helpful to know how ductless systems work and why mini-splits are popular.
The basics of ductless HVAC systems
With a mini-split AC system, individual units are placed in each room, rather than connecting to a central location like a regular air conditioner — ductless systems handle the heating and cooling needs of the room they’re in independently. The indoor air handler is made up of the fan and evaporator unit and is connected to an outdoor compressor unit with refrigerant lines. The air cools as it travels to the condenser, which then circulates through your home.
Ductless mini-split systems can also include heat pumps, allowing them to both heat and cool your home.
Why mini-splits are popular in modern homes
Mini-split systems are rising in popularity for a few key reasons, including:
- Improved energy efficiency.
- Greater control of individual room temperature.
- Lower-profile look when installed.
These, plus the flexible and modular installation methods, make mini-split systems a great choice for many homeowners.
Common Warning Signs Your Mini-Split Needs Repairs
What are the signs your mini-split needs repair? Here are the most common issues to look out for.
Reduced cooling or heating performance
You may notice inconsistent room temperatures when your mini-split thermostats are at the same setting, or it’s taking longer for rooms to reach the desired temperature. If you notice your ductless mini-split isn’t cooling or heating effectively, have the system inspected.
Unusual noises (buzzing, clicking, or hissing)
Another common sign that you need ductless air conditioner repair is strange noises coming from the system. Noises can indicate a variety of problems, but a professional will know how to identify these sounds and address them.
- Whistling or hissing is a sign of a refrigerant leak.
- Rattling may mean loose components or a foreign object inside the system.
- Humming and buzzing usually indicate an electrical issue.
Leaking water or refrigerant
Dripping water is a sign you need ductless AC repair. Your unit will collect condensation from the air, but this should be safely redirected from the system by the drain pan. If you notice any part of your mini-split system actively leaking water, it’s usually a sign of an issue with the filter, drain pan, or drain line.
Refrigerant leaks are another common concern. Refrigerant leaks are hazardous to your health and the environment and can result in reduced system efficiency. If you suspect a refrigerant leak, have an HVAC tech examine the system as soon as possible.
Foul odors from the indoor unit
Like conventional HVAC systems and portable ACs, a foul smell from your mini-split is a sure sign of a problem. Musty smells typically indicate mold or mildew growth somewhere in the system, while burning smells indicate a serious electrical problem. Both of these are hazards for your health and safety, so contact a professional to address them right away.
Mini-split not turning on or randomly shutting off
If your mini-split isn’t working at all or keeps randomly shutting off during use, it could be a sign of electrical issues or malfunction with your thermostat or remote. An HVAC tech will inspect all electricals and get your system running reliably again.
Blowing warm air instead of cold (or vice versa)
A unit blowing warm air instead of cold air (or vice versa) typically indicates an issue with either the compressor or the refrigerant levels. An HVAC technician can assess the system and provide their recommendations after an initial estimate.
What Causes Mini-Split Malfunctions?
The most common reasons for mini-split malfunctions are:
- Dirty or clogged air filters: Worn-out filters affect performance, efficiency, and airflow.
- Lack of maintenance: Routine AC maintenance and tune-ups are essential for keeping your system running efficiently.
- Refrigerant leaks and pressure issues: Failed connections and system damage can cause a range of mini-split issues requiring professional repair.
- Faulty electricals: Issues with the control board, sensors, power supply, and wiring can cause intermittent shutdowns or full system failures.
If your mini-split is malfunctioning, it’s best to contact a professional. DIY ductless repairs are risky — you could void your warranty, damage internal components, or even injure yourself. If you’re in the Clarkston area and are searching for mini-split repair near you, the Hoover HVAC techs are here to help. We offer superior service, affordable financing, and work you can trust.
Contact Hoover for Expert Mini-Split Repairs in Clarkston, MI
With decades of experience working on AC systems of all kinds, you can trust the Hoover team to diagnose, estimate, and repair your system with care, speed, and integrity. We offer both routine ductless maintenance and emergency mini-split service, getting your system up and running in just a matter of hours. Schedule a service with Hoover’s HVAC team today!
Frequently Asked Questions
What size mini-split system should I get?
The best-sized mini-split system depends on the size of the space you want to heat or cool. A small office or bedroom should be able to use the smallest systems available with great results. For larger spaces, such as a living room, you’ll probably need a larger system or possibly multiple mini-splits working together.
How many rooms can a mini-split cool?
Modern ductless systems are designed to work together for cooling multiple rooms, allowing you to connect multiple units to one compressor. This allows you to cool large areas while also saving space and improving energy efficiency.
How long do mini-split systems last?
A ductless mini-split system should last as long as a traditional air conditioner — about 20 to 25 years. Maintenance is essential for keeping your mini-split performing optimally and avoiding the need for mini-split repair.
Should I repair or replace my mini-split?
To determine whether it’s worth it to repair your ductless system, consider the system’s age, energy efficiency, and frequency of issues. Systems older than 20 years are generally not cost-effective to repair, and the efficiency of new units makes replacement a better option in many cases. If your mini-split is proving to be troublesome, a new unit will likely save you time, money, and stress.
