How to Troubleshoot Your Gree Mini Split System

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How to Troubleshoot Your Gree Mini Split System

Check these 5 DIY troubleshooting tips before you decide if you have a repair issue

Gree has grown fast since its beginning in 1991. Today, it’s one of the best-selling ductless mini split systems in the world. One of the reasons for its popularity is that it’s possible for knowledgeable homeowners to install these systems themselves. While it’s a testament to how well-made and uncomplicated Gree mini splits are, installation should be handled by a licensed installer to avoid voiding the manufacturer’s warranty.

Gree’s mini-split systems are designed to require little in the way of attention other than easy routine maintenance. Most operational problems can be resolved by one of these five troubleshooting tips.

1.  Check for tripped circuit breakers or blown fuses in the disconnect boxes

Your Gree mini split system should have a dedicated power supply and be configured in accordance with the local electrical safety regulations and National Electrical Codes (NEC). Don’t make this a guessing game. Have a licensed professional ensure that the entire system is correctly grounded and use a properly sized circuit breaker. Depending on the size of your mini split unit, that means anywhere from 15 to 35 Amps.

The mini split system may have tripped the circuit breaker or blown a fuse if it doesn’t respond to the unit’s remote control. There’s likely nothing wrong with your mini split system in this case. Reset the circuit breaker or replace the fuse. If the situation repeats, it will be necessary to contact an electrician to troubleshoot the problem.

2.  Cycle the system

If you’ve had problems with your smartphone or computer recently and asked a professional for help, they might have surprised you by asking, “When was the last time you turned it off and back on?” Today’s technology-assisted air conditioning systems have a lot in common with your other smart devices. Often, they just need a reboot.

If your Gree mini-split system is malfunctioning, try cycling the system – meaning completely powering down the inside and outside components – before calling a licensed repair professional. This might be all that’s necessary to get things running again.

Like rebooting your computer, cycling your mini split system is helpful in clearing error codes on the remote control or problems with the system’s hardware electronics. This can be done by turning off the power to both the external unit and the indoor air handling unit. These should be clearly labeled in your home’s main electrical box.

Power down both for about 10 minutes, then turn the breakers for both units back on. If either immediately switches back off, you may have a fault on that electrical circuit. It’s now time to consult an electrician. Otherwise, the outside unit and the indoor air handler will both cycle through a startup mode and should be ready for operation.

3.  Clean the indoor air filter

Keeping the indoor air handler clean prolongs your system’s life and helps to keep performance optimal. Gree recommends cleaning the air filter every 90 days. Turn off your unit and disconnect it from the main power supply before attempting to clean the air filter or indoor coil.

The indoor air handling unit is likely located closer to the ceiling, so you’ll want to have a stable ladder or step stool that gives you comfortable access to the front. The panel swings open upward and will remain open when it reaches a 60-degree angle. Reach inside and remove the filter.

You shouldn’t need more than a vacuum to clean the filter. If you find it needs more than this light cleaning, run the filter under warm water (less than 110 degrees). Be sure to allow the filter to thoroughly dry before reinstalling it.

4.  Remove obstructions from the outdoor coil

You know what they say: Out of sight, out of mind. It’s time to head outside if you find that your mini split system isn’t working as it should, and you’ve already checked the inside air handler. Investigate all four sides of the outdoor unit to make sure that there are no foreign objects lodged in the vents or grills.

Have you had a significant weather event recently? You might discover that Mother Nature has deposited some of her leftovers inside your outside compressor/condenser unit. Is something – a small branch, may be – lodged in the fan and preventing it from operating? It may be necessary to unscrew the grill to get access and remove anything that has restricted movement of the fan inside. It’s a good time to clean the unit while you’re inspecting it. You’ll find more cleaning recommendations for this part of your mini split unit here.

5.  Check remote control batteries

Check and replace the batteries if the remote control doesn’t give you access to your Gree mini split’s operations. Use only new AAA batteries and be sure to place them correctly.

Meanwhile, you can turn off your mini-split system manually. Lift the front panel of your indoor air handler unit. Locate and press the “AUX” button. Using this button will allow you to turn the unit off or operate it in the “AUTO” mode.

Most Gree mini split units also can be operated by an app you can download to your mobile device. You can find out more about Gree’s Wi-Fi capabilities and operations here.

One of these five troubleshooting tips might be all that’s necessary to get your Gree mini split back up and running. Try them before you make a call to an HVAC professional who’s certified to work on Gree systems. Learn more about the Gree systems and configurations we carry.