How To Fix It

Why Mini Split Fan Runs Continuously?

If you are used to how centralized heating and cooling systems work, you might be surprised by the way a ductless mini split operates. There are quite a few important differences that you should be aware of.

Inverter mini splits can actually run all the time; they do not cycle on and off like traditional air conditioners and furnaces. Ductless units will keep the indoor fan working continuously so that a special sensor is able to monitor the temperature of the air.

Do Mini Split Units Run All the Time?

There are mini splits that start and stop like an ordinary heating and cooling system (these are cheaper). However, you can choose to get an inverter mini split that can run all the time.

As the name suggests, these units are equipped with inverter technology. In a word, the equipment is able to run at a certain percentage of its capacity (based on how much cooling or heating is needed at the moment).

Mini splits that run continuously are actually more energy-efficient. In fact, ductless units are able to cut heating costs by around 60% and cooling costs – by 30%, when compared to conventional heating and cooling systems

Read: Can A Mini Split Cool A Whole House?

How Long Should a Mini Split Run?

You can keep your mini split running all day long. And the great news is that you will not only save on your energy bills; if your keep the system operating, you will also help make sure that your house stays at a comfortable temperature.

With conventional heating and cooling, the furnace or air con will kick in only once the temperature reaches a certain level. As a result, at times, your home might get a little too hot or too cold.

This can be avoided with a ductless mini split as it is able to keep the temperature pretty much constant throughout the whole day (unless you change the settings, of course). 

Does Daikin Mini Split Fan Run Continuously?

Almost all mini split systems, including those manufactured by Daikin, will run the indoor unit’s fan continuously when switched on.

The fan will always be running at a low speed so that the temperature sensor that’s located inside the wall-mounted ‘head’ knows exactly when to cool or heat.

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Read: How To Choose The Right Size Mini Split?

Do Mini Splits Ever Shut Off?

As long as the ductless mini split system is able to maintain the right temperature, you have nothing to worry about. So, if the unit is running the fan continuously, but there are no problems with the operation, then it’s totally okay that the mini split is operating all the time.

The majority of mini splits will never completely shut down unless you manually turn them off.

How Long Can You Run a Mini Split System?

You can choose to run the mini split for as long as you want without worrying about using too much electricity. The truth is that turning the system on and off will ‘eat up’ a lot more energy, than simply letting the unit run continuously.

Of course, if you don’t need any heating and cooling, then you might want to shut the ductless system off so that it doesn’t consume any electricity at all.

Read: Do I Need A Mini Split In Every Room?

Mitsubishi Mini Split Fan Always Running

The fans in a Mitsubishi mini split system will continue running even when the set temperature has been reached. However, if, for some reason, you don’t want the fan to run, you can change the default settings of the unit.

  1. Hold the ‘fan’ and the ‘up arrow’ buttons simultaneously for about 3 seconds on your MHR1 remote.
  2. Select ‘more’ and get to ‘setting 125’ or ‘setting 127’.
  3. Press ‘2’, if you want the fan to turn off once the set point has been reached (setting 125 is for heating and setting 127 is for cooling).

LG Mini Split Fan Runs All the Time

Just like with a lot of other systems, the LG mini split is designed to run the indoor fan continuously

That is done to provide the temperature sensor with enough air so that the element can turn the compressor on and off as soon as the temperature changes. 

Why Mini Split Fan Runs Continuously?

Inverter mini splits are designed to be able to run continuously. 

Instead of turning on and off, the system simply ramps up and down to be able to keep the temperature at the desired level. Such a feature is exactly what makes mini splits so energy-efficient.

Bear in mind that once the set point had been reached, the outdoor unit might stop working. But in the majority of cases, the indoor unit’s fan will continue to operate – this helps the system sense a temperature change and helps maintain air movement in the house.

Why Does My Mini Split Not Turn Off?

If your mini split is able to maintain the correct temperature while continuously running, then you have nothing to worry about. However, if the unit fails to keep your home at the desired setting, then there is something wrong.

Excessive running of the system and improper functioning can be caused by:

  • Faulty wiring – such an issue can make the system run all the time or not work at all.
  • Lack of refrigerant – without enough refrigerant, the unit won’t be able to achieve the desired temperature.

What Do Mini Splits Run On?

A mini split system is, basically, a heat pump technology. Such units have a condenser and an evaporator and they use refrigerant to provide heating and cooling.

Ductless mini splits rely on electricity to make certain parts of the system cycle the refrigerant. 

Read: Can You Put A Mini Split In Bathroom?

How to Use a Mini Split System?

Mini split systems are relatively easy to use as you can turn them on and literally forget about the unit (it can run continuously).

But even though such systems are incredibly energy-efficient, there are always a few additional things that you can do to make them operate even more effectively. Performing routine maintenance is, of course, at the top of the list.

Should I Leave My Mini Split on All the Time?

Your ductless mini split can easily end up running all the time. Simply let the system do its job as the unit will spend much more energy if you decide to keep turning it on and off.

Should I Turn Down Mini Split at Night?

Turning down the temperature at night will not help you save a lot of energy, in the case of mini splits.

But if you want to make the house cooler, simply because it helps you sleep better, you can definitely do that. However, do bear in mind that you won’t be achieving any energy-related benefits.

Should I Leave My Mini Split on All the Time in Winter?

A ductless mini split can run continuously all winter long, but its efficiency can decline.

Economy-level mini splits, for example, are able to run at 100% efficiency until the temperature drops to 30 F and might completely shut down when it becomes colder than 20 F outside.

Read: Mini Split In Dry Mode Vs. Dehumidifier: Which One Is More Efficient?

At What Temp Does a Mini Split Stop Working?

The majority of mini splits will stop working when it gets colder than 5 F or hotter than 115 F outside.

Mini Split Turning On and Off

Unlike many other heating and cooling units, mini splits do not cycle on and off. These units tend to run all the time.

If your mini split is turning on and off, then there might be a refrigerant leak.

How Do You Troubleshoot a Mini Split?

  1. Check the outdoor unit. Make sure that nothing is obstructing the airflow, that there are no leaks, and that the unit is not damaged.
  2. Check the power supply in your house.
  3. Clean the condensate drain line.

Replace dirty filters and clean the vents.