E2
Gree Air Conditioner
Severity: ModerateWhat Does This Error Mean?
E2 on a Gree air conditioner means the indoor coil (evaporator) temperature sensor has failed or is reading out of range. This is different from E1 which monitors room temperature — E2 monitors the coil directly. A power reset sometimes helps; otherwise the coil sensor needs replacement.
Affected Models
- Gree Livo
- Gree Sapphire
- Gree Vireo
- Gree Versati
- Gree mini-split units
Common Causes
- Evaporator coil temperature sensor failed
- Coil icing over due to low refrigerant or blocked filter — sensor reads out of range
- Sensor wiring pinched or damaged inside the indoor unit
- Control board fault
- Extreme outdoor temperatures causing unusual coil temperature readings
How to Fix It
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Turn off the unit and check the indoor air filter — clean or replace if dirty.
A clogged filter causes the evaporator coil to ice over. An iced coil drives the temperature sensor out of its operating range and triggers E2. Cleaning the filter often resolves the underlying cause.
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Turn the AC to fan-only mode for 30 minutes to defrost the coil if iced.
If the coil is frozen, running fan-only melts the ice before restarting cooling mode. Look for visible frost or dripping from the indoor unit as signs of coil icing.
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Power cycle the unit — off at the circuit breaker for 5 minutes, then restart.
After the coil has defrosted and the filter has been cleaned, a power cycle clears the E2 fault from the control board memory.
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If E2 persists, contact an HVAC technician to check refrigerant charge and replace the coil sensor.
Low refrigerant causes the evaporator to run too cold and ice over repeatedly. Only a certified technician can recharge refrigerant safely.
When to Call a Professional
E2 that persists after a power reset and filter clean requires a technician to check refrigerant levels and replace the evaporator sensor. Contact a certified HVAC technician.
Frequently Asked Questions
Why is my Gree AC blowing warm air and showing E2?
E2 with warm air output suggests the evaporator coil is iced over. The ice prevents heat exchange and triggers the coil sensor fault. Clean the filter, switch to fan-only for 30 minutes to defrost, then restart cooling.
Can low refrigerant cause E2 on a Gree AC?
Yes — low refrigerant causes the evaporator coil to run at abnormally low temperatures. This causes coil icing and sensor out-of-range readings. Only a certified HVAC technician can check and recharge refrigerant.