E4 on display Hi my Air Conditioner is a CARRIER WRAC unit and does not cool. it powers but the air is not cool air. the display has E4 and i have never seen this before. can you please help? E4 means

E4 Error Code
The E4 display is not actually an error code, but indicates that the air conditioner has entered defrost mode. This occurs when the unit detects ice on the evaporator which located behind the front grille. Once defrosted, the air conditioner will resume normal operation.
https://www.lg.com/us/support/help-library/error-codes-room-air-conditioner-CT10000014-1432829295501

https://sialkotacrepairing.com/2020/01/20/orient-ac-error-codes/

PDF]SERVICE Manual - Quietside

https://www.quietside.com/archives/.../Service%20ACC1800C.pdf

When error occurs in air conditioner, error code is displayed on indoor unit .... Display priority order at overlapping error : E1?E4?E5?P0?P0?P5?P6?t1? ...

Midea air conditioner error codes

airmaster.net/midea-air-conditioner-error-codes/

Midea air conditioner error codes. Indoor unit error code explanation: R series: ... E1, Indoor / outdoor units communication protection. E2, Zero-crossing signal error ... E4, Outdoor unit temp. sensor or connector of temp. sensor is defective.

[PDF]Download the Fault Error Code Booklet - Samsung

No refrigerant in the system

Need model. Number or name. E4 is several different codes for carrier. Likely a temp sensor from what I'm seeing.

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Hi,

Here is a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool...

AirConditioner Trouble - Review the Possibilities

heatman101

E-4 ..........short of asor no gas/E4 is an "Abnormality of Outdoor Unit."Find leak and arrest it. Recharge gas.

Hi, you should have a error chart on one of the panels of the unit that will tell you what the 5 blinks mean. It will be pasted on the unit inside some where. Let me know what you find and we will go from there. Merry Christmas,
Shastalaker7

E4 indicates your unit is in need of service.

E4 means return air sensor error, if the error cannot reset may be the return air sensor is out of range or defective. But if the sensor is ok you need to replace the control board itself. The reading of return air sensor is 8k to 10k ohms @ 25deg. C temperature.

Start the unit and press the remote control at C if the display in the unit displays C, then turn off the unit using the remote control and plug out the ac supply. Plug the unit again and using the remote control turn on the unit. If the E4 still display there is something wrong with your air in sensor or the main board itself. Replacement of this parts needs a qualified technician.