Hey there. You noticed your mini split isn't cooling like it used to. Before you buy a new mini-split, let's discuss a few common reasons why your mini-split may not be operating at full capacity. The good news is most are easy fixes. Before you call an expensive service tech, check out this article by The Trade Table to troubleshoot the issue yourself.
GREE Vireo+ Ultra 30K BTU 18 SEER Wall Mount Mini-Split Single Zone Heat Pump - VIRU30HP230V1A
$3,917.95
GREE Vireo+ Ultra 30K BTU 18 SEER Wall Mount Mini-Split Single Zone Heat Pump The Vireo+ Ultra combines the design of the original Vireo+ system, while extending the operating capacity to -31°F. It has been designed to blend into any… read more
Common Reasons a Mini Split Is Not Cooling Properly
Is a mini-split system not cooling properly? There are a few common culprits to check first, but the first thing you should check is ensuring your mini split is properly sized. Use our mini sizing calculator to determine the right capacity for your unit.
Refrigerant levels low
- Over time, refrigerant can leak from the lines or coils, reducing cooling capacity. Have an HVAC tech recharge the unit with fresh refrigerant to the proper level.
Dirty filters
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Clogged filters prevent air flow, making the unit work harder and cool less efficiently. Inspect filters once a month and replace them if dirty. Neglecting filters is one of the most common reasons mini splits underperform.
Blocked air vents
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Make sure vents and intakes are clear of any obstructions that could hamper airflow to and from the unit. Dust, pet hair, and debris buildup reduce cooling and efficiency. Vacuum vents and intakes regularly.
Thermostat issues
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If the thermostat isn't communicating properly with the unit, it won't cool to the set temperature. Try resetting the thermostat to factory settings. If that doesn't work, it may need replacement.
Refrigerant leak
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Have an HVAC technician check for any refrigerant leaks in the lines or coils and repair them as needed. Leaks reduce cooling capacity and also release harmful hydrochlorofluorocarbons (HCFCs) into the atmosphere.
Buck Cool Mini-Split EZ Connect 36K BTU Complete Installation Kit
$3,929.54
$4,869.99
Buck Cool Mini-Split EZ Connect 36K BTU Complete Installation Kit The Buck Cool Mini-Split EZ Connect Complete Kits are designed to offer a simple solution for your heating and cooling needs. The pre-charged EZ Connect line sets allow for a… read more
How to Troubleshoot Your Mini Split Air Conditioner When It's Not Cooling
So your mini split air conditioner isn't cooling like it should? Don't panic; there are a few things you can check before calling a technician.
First, make sure the unit is turned on and set to cooling mode. Double-check that the temperature is set lower than the current room temperature. Silly mistakes happen!
Next, check that the air filter is clean. A clogged filter reduces airflow and efficiency. Slide out the filter, rinse or vacuum it if dirty, then reinstall.
Low refrigerant levels
If your AC still isn't cooling well after checking the above, low refrigerant levels could be the culprit. As refrigerant depletes over time, less cold air circulates. You'll need an HVAC pro to recharge the refrigerant.
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Check for visible damage to the condenser unit outside like dents or coils that need cleaning. This can also reduce cooling.
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Ensure all vents and registers in your home are open and unblocked so the cold air can circulate properly.
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Double-check that the thermostat is working correctly by lowering the temperature setting to see if the unit responds.
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Try running the AC on a lower fan speed as higher speeds can reduce cooling.
MRCOOL DIY 4th Generation E Star 12k BTU Ductless Mini-Split Heat Pump Complete System 115V/60Hz
$1,738.00
DIY 4th Generation E Star 12k BTU Ductless Mini-Split Heat Pump Complete System 115V/60Hz Introducing the latest in home comfort technology with the 4th Generation MrCool DIY 12K BTU, 22 SEER Ductless Heat Pump System. This powerful single-zone system has… read more
Professional Repair Options for a Mini Split AC System Not Cooling
If your mini split AC system is not cooling properly, it’s best to call in a professional to diagnose and repair the issue. DIY repairs on these systems can be difficult and may end up causing more harm than good. Here are some options to consider for professional mini split AC repair.
Addressing Cooling Issues in Mini Split AC Systems
A licensed HVAC technician can perform a full diagnostic to determine why your mini split isn’t cooling. They have the proper training, tools, and experience to test components like the compressor, condenser coils, fans, and refrigerant levels to pinpoint the malfunction. Once the issue is found, they can recommend repairing or replacing the faulty parts to get your AC back to blowing cold air.
Seeking Professional Diagnostic and Repair Services
An HVAC service company employs technicians who specialize in mini split installation and repair. They will send a tech to your home to evaluate your system and perform repairs to components like the compressor, control board, drainage line, or refrigerant lines. They can also recharge the refrigerant if levels have gotten too low, flush out clogs, or replace filters and parts as needed to restore cooling.
Utilizing HVAC Expertise for Effective Mini Split Maintenance and Repair
Some mini-split manufacturers offer service agreements or warranties that provide repair coverage for a certain period. If your system is still under warranty, check with the company that installed it or the manufacturer to schedule a service call. They will send a certified technician familiar with that brand of equipment to inspect, troubleshoot, and make necessary repairs, often at little or no cost to you.
Rather than continuing to battle an AC that won’t cool on your own, call in the pros to get an accurate diagnosis and solution. With professional mini split repair, you’ll have a working AC again and peace of mind that the job was done right.
36,000 BTU 16 SEER ACiQ Single Zone Wall Mounted Mini Split System w/ WiFi
$2,430.00
36,000 BTU 16 SEER ACiQ Single Zone Wall Mounted Mini Split System w/ WiFi ACiQ’s mini split systems are designed to give you intelligent technology and superior comfort, all at a reasonable cost. Single zone systems are the perfect choice… read more
Effective Solutions to Get Your Mini Split Cooling Again
So there you have it, a few of the most common reasons why your mini split may not be cooling properly. Before you call an HVAC pro to come check it out, do some troubleshooting yourself. Check for any obvious issues, like a clogged filter or if it’s switched to the wrong mode. Make sure all vents and intakes are clear, and the unit has enough space for proper airflow. If it’s still not cooling after trying a few easy fixes, it’s probably best to get a technician involved. They have the proper tools and experience to diagnose and repair the problem, whatever it may be. At least now you’ll have an idea of what could potentially be going on and can have an informed discussion about the issue. Stay cool out there!
Table of Contents: Why is my Mini Split Not Cooling
