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Troubleshooting A Mini Split That’s Not Cooling

Mini splits that don’t provide adequate cooling can be highly inconvenient, especially when you need it the most. With enough knowledge and professional assistance, you can get your unit back in working condition.

This blog post will address both common causes and solutions to fix a mini split not cooling. Of course, any methods for resolving issues should always be handled by a professional, as they’ll have all the right expertise and tools on hand.

Common mini split problems that prevent proper cooling

Here are some common problems encountered that could be preventing your mini split unit from properly cooling your home.

Air flow restrictions

Your mini split’s air flow could be restricted if dust or debris becomes lodged within its intake and exhaust vents. Fan blades becoming damaged can also block sufficient air flow.

Dirty coils

Similarly, when mini split coils become dirty or clogged up with debris, performance can quickly decrease. 

Have a professional regularly inspect all condenser coils for signs of accumulation which might obstruct air flow. If this is an issue, they’ll use the right coil cleaning solution to restore functionality to your unit.

Low refrigerant levels

If you find yourself asking, “Why is my mini split not cooling?”, the answer may lie in low refrigerant levels. When refrigerant levels fall below adequate levels, their performance becomes insufficient to effectively cool your home. 

Leaky or damaged lines could contribute to low refrigerant levels, acting as sources for reduced performance.

Malfunctioning compressor

Your mini split’s inability to properly cool could be due to issues related to its compressor, caused by broken wiring or motor failure, making replacement necessary.

Thermostat issues

Failing to set or calibrate your thermostat correctly can prevent your mini split from providing adequate cooling. 

For the best results, ensure it has been set according to recommended specifications, with temperatures set lower than ambient temps for best results.

Fan speed

Another reason for your new mini split not cooling could be due to fan speed. To ensure optimal operation of your mini split system, ensure the fan speed has been correctly adjusted and any dust accumulation on its blades has been cleared away.

Clogged filters

Clogged or dirty filters can obstruct air flow and undermine unit performance, impacting its effectiveness and efficiency. 

In order to optimize the performance of your mini split unit and ensure peak results, regular inspection is important.

How to troubleshoot a mini split that isn’t cooling

So how do you troubleshoot a mini split not cooling? Here are some things you can consider having a professional do.

Resolve air flow complications

Assessing the air flow of a mini split that won’t cool is the starting point of identifying why it’s malfunctioning.

A professional will be able to inspect both intake and exhaust vents for air flow obstructions, as well as check fan blades that have become warped or bent which reduce circulation to take action accordingly.

Restore refrigerant levels

A new mini split not cooling can be resolved by restoring refrigerant levels. After all, as previously mentioned, low levels of refrigerant in your mini split can impede its effectiveness at cooling your house.

Low refrigerant levels are possibly caused by leakage in the unit’s lines or damage. Have a professional check these lines thoroughly to rectify this problem as soon as possible.

To restore refrigerant levels, make sure to contact an HVAC professional, as refrigerant handling requires a license due to the danger involved with handling this toxic substance.

Inspect and fix damage to the unit’s compressor

A mini split system’s compressor could leave your home uncooled, so have a technician inspect its condition for broken wires, motor faults, or signs that need professional repairs.

Adjust thermostat settings

Still struggling with your mini split not cooling? Ensure your thermostat settings are sufficient.

If you notice that all the settings are correct, there may actually be damage to your thermostat. The assistance of an HVAC technician is needed in this situation.

Replace or clean air filters regularly

One thing you as a homeowner can do is ensure that your air filter is clean. Make sure to regularly check them to maximize the performance of your mini split system, cleaning them as needed.

In most situations of addressing the non-cooling issue with your mini split unit, it’s vital to consult a professional technician. Their extensive expertise will allow them to quickly identify the cause of your issue before performing repairs if required.

Having issues with your mini split unit? Contact AHWA

Resolving the issue of a mini split not cooling can be daunting, but with some knowledge and some direction, it should become simpler to locate its source to fix it quickly and effectively. With assistance from an expert technician, your mini split system will soon be operating at peak performance.

If you live in the Phoenix, Arizona area and are looking for professional HVAC help, contact American Home Water & Air today!

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