E1
Gree Air Conditioner
Severity: ModerateWhat it means
E1 on a Gree air conditioner means the indoor unit temperature sensor has failed or is reading an out-of-range value.
A power reset sometimes clears a temporary E1.
If it persists, the room temperature thermistor needs replacement.
Affected Models
- Gree Livo
- Gree Sapphire
- Gree Vireo
- Gree Versati
- Gree mini-split units
Common Causes
- Indoor temperature sensor (thermistor) has failed
- Thermistor wiring connection loose or damaged
- Sensor reading out of range due to extreme room temperature
- Control board fault misinterpreting sensor signal
- Condensation or moisture on the sensor circuit
How to Fix It
-
Turn off the AC at the unit and the circuit breaker. Wait 5 minutes, then restore power.
A power reset clears temporary sensor faults caused by voltage spikes or brief communication errors.
If E1 does not return within 30 minutes of operation, it was a temporary fault. -
Check that the indoor unit filter is clean and airflow is not blocked.
A severely clogged filter restricts airflow over the sensor, causing it to read incorrectly.
Remove and clean or replace the filter if it is visibly dirty. -
If E1 persists, contact a certified HVAC technician to test and replace the thermistor.
The indoor temperature sensor is a small thermistor inside the air handler.
A technician can test it with a multimeter and replace it in under an hour.
When to Call a Professional
E1 that persists after a power reset requires replacement of the indoor temperature sensor.
Contact Gree service or a certified HVAC technician — working inside the air handler involves electrical components.
Frequently Asked Questions
Can I keep using my Gree AC while E1 is showing?
No — E1 causes the unit to shut down to prevent operating without accurate temperature feedback.
Using the AC without a working sensor can cause the unit to run in an uncontrolled state.
Have the sensor replaced before resuming use.
Is E1 covered under Gree warranty?
Gree air conditioners typically carry a 5-10 year warranty on parts.
A sensor failure within the warranty period should be covered.
Contact Gree support with your model number and purchase date to arrange warranty service.