Haier air conditioner E9 code: overload in heating mode (split)

On split heat pumps, the indoor coil got too hot while heating, so the unit cut back to protect itself. Poor airflow through the indoor unit, such as dirty filters, is the usual cause.

Likely causes

Listed from most to least common.

1. Air filters clogged with dust
2. Air intake or outlet blocked
3. Fan speed set very low while heating
4. Indoor fan motor weak or failing
5. Room already warm with a very high set point

How to fix the E9 code

1. 1

   Step 1: Turn off and unplug

   Switch the AC off and turn off its power before opening the front panel.

2. 2

   Step 2: Clean the filters

   Slide out the filters, vacuum or rinse them, let them dry fully and refit them.

3. 3

   Step 3: Clear the airflow

   Make sure nothing blocks the top intake or the louvers where warm air comes out.

4. 4

   Step 4: Restart with a higher fan speed

   Turn heating back on with Auto or a higher fan speed and a normal set point, about 70°F (21°C).

You'll need: Vacuum with brush attachment.

Parts that may need replacing

Check your model number on the label inside the door or on the back before ordering.

• Haier mini-split filtersCheck prices

When to call a technician

If E9 keeps appearing with clean filters, the indoor fan motor or a sensor may be failing. Book an HVAC technician.

A typical repair for this code costs $150–$450 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