Haier air conditioner F13 code: low refrigerant (split)

On split and mini-split systems, the AC has detected that it is short of refrigerant. This almost always means a leak in the pipes or connections, and only a licensed technician can fix it.

Likely causes

Listed from most to least common.

1. Refrigerant leak at a flare joint between the units
2. Leak in the indoor or outdoor coil
3. Line set damaged during work on the house
4. System not charged correctly at installation

How to fix the F13 code

Unplug the air conditioner or switch it off at the breaker before removing any panel or filter.

1. 1

   Step 1: Turn the system off

   Switch the AC off. Running it short of refrigerant can damage the compressor.

2. 2

   Step 2: Note what you see

   Look for oily marks at the pipe connections or ice on the pipes. Do not touch or tighten the fittings.

3. 3

   Step 3: Book an HVAC technician

   Tell them the code and any oily marks you found. They will find the leak, repair it and recharge the system.

When to call a technician

Always. Refrigerant work needs a licensed HVAC technician with the right equipment. Do not add refrigerant yourself.

A typical repair for this code costs $300–$1500 in the US, including parts and labor. Prices vary by area and model.

Models this applies to

• Ductless mini-split and wall-mounted split ACs
• Inverter split heat pumps
• Portable air conditioners (US, 2017 and newer)

Codes can differ slightly between models. Your owner's manual is the final word and is available from Haier support.

Common questions