With this ductless ac troubleshooting guide, you can find problems with your system, fix it yourself, and save a lot of money.We will guide you through the process of identifying the problem and repairing your air conditioner or heat pump.The normal service charge would cost you over $100 but, with this guide, you can save that money. **NOTE** Only you can assess your ability to perform these actions. This is a guide and cannot give the details/procedures for every possible situation. If your unit is not operating, you should begin your ductless ac troubleshooting by checking the display on the fan coil for a fault code. In most units, the display will show an E with a number. With that number you can narrow down the problem by referring to the user manual/installation instructions.Next, you should check the room temperature setting. On most units this is done with the remote control. Ensure that the unit is in the proper mode and the setpoint is correct. You should also make sure the unit has been off for at least three minutes.

If the display on the air handler is blank, check the fuse or breaker for the unit. In the case of a tripped breaker, you should check the wiring connections in the outside unit. Some units also have a fuse on the control board in the air handler. Continue your ductless ac troubleshooting by checking the air filter. It should be washed at least every month. Also check to see if there is any ice buildup on the coil. If there is ice build up, check to make sure the fan is working. Make sure the blower wheel is free to move. If it is free and the fan is not working then the problem is probably the motor or the control board. If the fan is working, allow the ice to melt and check the refrigerant level in the unit. If there is no ice and the fan is working, you should go to the outdoor unit. If the fan on the outside unit is not running, you should check the dual run capacitor. Our capacitor testing guide will help you with that. If the capacitor can is bulging, it is a good indication that it is bad.

If the capacitor is good the condenser fan motor may be bad. You can use our fan replacement guide to help you.If the fan is running, feel the compressor to see if it is running. If it is hot to the touch and not running, shut off the power and cool the compressor by pouring water over it. Then, check the outdoor coil and make sure it is clean. You should also check the dual run capacitor.natural gas furnace ac unitAfter the unit is running, you should check the refrigerant level.outside ac unit not coolingIf, after the compressor is cooled down, the unit makes a loud humming noise when it is trying to start, the compressor rotor may be stuck. replace a central air conditioning unitYou can use a hard start capacitor to try to get it to run.

If the compressor still does not start, it may need to be replaced. You can use our compressor testing guide to check to be sure.If the fan and compressor are running but the cooling or heating is insufficient, start by cleaning the unit. Ensure the fan coil, filter, and condenser coil are clean. Then you can check the refrigerant level and adjust per the operating instructions.**NOTE** IN SOME COUNTRIES, YOU MUST BE CERTIFIED BY THE GOVERNMENT TO HANDLE REFRIGERANT. If the unit's refrigerant charge is adequate, the unit may be improperly sized. The only way to tell if the unit is the proper size is through a process called a load calculation. If your unit is dripping water, you should begin your ductless ac troubleshooting by checking the drain hose to see if it is clogged. The easiest way to do this is with a bottle of water. Outside, stick the end of the hose in a bottle of water. Seal around the bottle opening with your hand. Then squeeze the water bottle and then pull the hose out.

The water should drain but this may need to be done a few times to make sure the line is clean.If the hose was not clogged, check to make sure the fan coil unit is sloped properly. The unit should be slightly out of level with the end attached to the drain hose slightly lower than the other end. If the remote does not work, you can replace the batteries. If it still does not work or you can't find it, most units have an emergency button on the fan coil unit that you can push to make it run. It will then operate as necessary to maintain a default temperature. You should complete your ductless ac troubleshooting by observing a complete heating or cooling cycle.PRODUCTS & SERVICES TOP Air Conditioning & Refrigeration Daikin leverages its experience and technology to deliver air conditioning solutions that meet the demands of any setting. Air to Water Heat Pump Systems Training & Technical Support Pioneering Fluorine Technology Providing Solutions for Life

Utilizing IPM motor and inverter technology for greater energy savingsLooking to find HVAC contractors in your area? Get free quotes » If you are joining the growing trend of homeowners purchasing ductless mini split air conditioning systems, you may benefit from some suggestions on how to keep your system running well. Ductless mini split air conditioning systems are ideal for virtually any home or business. The "mini splits," as they are sometimes called, overcome the need or expense of central air conditioning systems. Ductless mini split air conditioners allow for high efficiency, lower cost cooling and heating with ultimate climate control.Learn here about some of the common issues with ductless mini split air conditioners and how to avoid and troubleshoot them.What is a ductless mini split air conditioner?A ductless mini split air conditioner is made up of three components, compressor (outdoors), air handler (indoors) and a remote. There is no need for extensive rebuilding or retro-fitting to install the unit.

All that is needed is an approximately three-inch hole in a wall or ceiling for the connecting pipes and wires to run through. Ductless mini split air conditioners can be installed nearly anywhere and are especially good for remodeling or additions to your home.If it's so simple, what can go wrong?Let's start with installation. If you are technically inclined, you can purchase a kit to install your ductless mini split air conditioner. Most companies offer an installation kit. Essentially, you need to attach both the indoor and outdoor units, connect refrigerant lines, and make some electrical connections. It is important to note that while some companies will void your warrantee if you self-install, many do not.If any of the above makes your eyes cross or cartoon question marks appear above your head, hire a professional for installation. Installation in an average home will only cost around $200. If you are already paying $1,500 to $4,000 for a system, it's a small price to pay for peace of mind.

It's All About the CleaningThe average ductless mini split air conditioner, with proper care and maintenance, will have a lifespan of 12 to 15 years. If you live in an area with high humidity or salt, your system may not last quite as long. The best maintenance you can provide your system is cleaning it. Clean and change your filters. Not only will you prevent breakdowns and freeze-ups, but you will enhance the ability of the system to purify the air in your home. Most air handlers have tabs to take out filters to clean and/or change easily. For your compressor, take the garden hose and wash it down well several times during the season of use.Caution: When servicing your system, especially when using water, shut the power off.Other Tips to Keep Your System Running SmoothlyDuctless mini split air conditioners work best in temperatures between 14°F to 109°F.Make sure there is an appropriate place for condensation to run off.Keep vegetation, debris, etc. from around the compressor for optimal air-flow (which will also make it easier to clean).