My mini split unit operates but will not cool. What can I do to fix this problem?

A. Check filters in the indoor unit. If filters are dirty clean or replace.
B. Check to make sure there is no blockage around the indoor or outdoor unit.
C. Check for proper suction pressure.

1. Suction pressure should range between 60 and 70 PSI
2. If pressures are too high, you will have to remove small amounts by evacuating lines until suction pressure is in range.
3. If pressure is too low. You will need to add refrigerant. If the mini split unit “RUN Load Amps” are more than two times the stated “RUN Load Amps” on the label of the outdoor unit label, replace capillary assembly.
4. The mini split unit will also not cool in low outdoor temperatures. There are low ambient kits to help run your air conditioner in temperatures below freezing.

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Why is my evaporator icing up?

Reasons why evaporator is icing up:

A. Filters may be dirty. Take filters out of the evaporator unit and clean.
B. Run the fan only without the cool mode or heat mode. This process heats the unit and will melt the ice.
C. After the ice on the evaporator has melted the unit should operate properly.

Why am I getting moisture from my indoor evaporator unit?

Most units have a drain pan. At time of installation a mini split air conditioner needs to be angled a ¼” down towards the drain line to help empty the drain pan. Window units need to angled a ¼” from front to back. Ductless systems use gravity to drain condensation, which is a byproduct of air conditioning. Make sure that the drain pan can properly empty by angling the unit.

Things to check if my unit is properly positioned:
A.  Check the drain line for blockage (dirt, leaves, etc.). If you have a blockage take the line off the unit and clean.
B.  Check to make sure drain line is connected to unit properly.
C.  Check for cracks or holes in the drain line.

Why is my indoor evaporator fan not working?

Fan in indoor unit: Start by using the remote to put the unit in fan mode. If the indoor fan starts operating this is the normal response.

If the fan does not operate at this time check these solutions:

A. Make sure the timer function on the remote is not on.  If timer function is on use remote to deactivate.
B. Fan motor could be defective.  Check for short windings or open windings.  Must replace fan motor if these symptoms are found.
C. Fan capacitor needs a capacitor checker for this one.
D. Faulty control board, need to replace control board.

Why is my remote not controlling my ductless air conditioner?

Remote:  When turning on the remote you should hear a beep from the indoor unit.  If you hear the beep the remote is in working condition.  The unit will not beep when turned on.

Things to check when this happens:

A. Faulty remote, replace batteries if this is not the cause replace remote.
B. Blown fuse on the indoor control board.  Remove control board from indoor unit and replace.
C. Indoor unit is not receiving power.  Check the line voltage between the terminals.
D. The indoor board could be faulty, replace indoor board.