Haier air conditioner E2 code: temperature sensor fault (split and portable)

The AC has lost the signal from a temperature sensor. On split and mini-split units Haier lists E2 as the indoor coil (pipe) sensor. On US portable models from 2017 on, E2 is the room temperature sensor.

Likely causes

Listed from most to least common.

1. Temperature sensor failed (open or short circuit)
2. Sensor plug loose on the control board
3. Sensor wire damaged
4. Control board fault

How to fix the E2 code

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

1. 1

   Step 1: Turn the unit off

   Switch the AC off with the remote or control panel.

2. 2

   Step 2: Reset the power

   Unplug the unit, or switch off its circuit breaker, for 5 minutes. Then turn it back on and see if the code clears.

3. 3

   Step 3: Book a repair if it returns

   If E2 comes back, turn the unit off and contact Haier service or a technician.

Parts that may need replacing

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

• Haier AC coil sensorCheck prices

When to call a technician

If E2 returns after a power reset, the sensor or its wiring needs testing inside the indoor unit. Book a technician.

A typical repair for this code costs $120–$300 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