Room Temperature Sensor Error

What it means

This code appears on Haier split air conditioners to indicate a fault in the indoor room temperature sensor, usually an open circuit, a short or an implausible reading. This sensor measures the air returning from the room; without its reading the unit stops or runs without proper temperature control. Haier codes differ between series, so confirm the meaning in your unit manual before buying any part. The same code can mean something else on other brands.

Models covered: Haier split air conditioners; codes differ between Haier series, so confirm with the unit manual.

Related codes: E2E4E7E14

Symptoms3

• The code shows at start-up or shortly after.
• The unit does not cool, or does not stop at the set temperature.
• The displayed room temperature looks wrong on some models.

Possible causes5

• Loose or corroded sensor connector on the indoor board.
• Sensor (thermistor) failed from moisture or age.
• High humidity or water leaking inside the indoor unit reaching the sensor.
• Wire broken or poorly insulated somewhere along its length.
• Faulty sensor circuit on the indoor board, which is relatively rare.

How to diagnose5

1. Read the code meaning in your unit manual to confirm it refers to this sensor on your series.
2. Switch off at the breaker for a few minutes and restart.
3. With the power off, the technician checks the sensor connector on the indoor board.
4. The technician measures the sensor resistance and compares it with the Haier table for the model at room temperature.
5. The technician substitutes a known-good sensor before blaming the board.

How to fix5

1. Clean and secure the connector.
2. Repair or replace the wire.
3. Fit a new sensor matching the model in its correct position.
4. Replace the indoor board if proven faulty.
5. Run the unit and confirm the code is gone and cooling is steady.

The sensor and connector are usually cheap parts; the indoor board is what raises the cost if it needs replacing.

Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.
Prices last updated: September 2026

Frequently asked questions