What is E4 ERROR IN WHIRLPOOL CHROME AC - Whirlpool ACC108PS Air Conditioner

The drain hose or the filter could be clogged and need to be replaced for your washing machine.

Double-check on the exact error code. For E2, E4, E5, E6, F1, F2, F3, F4, F5, H3, H4, H5, PL, PH, you must turn on the device And disconnect the power supply, then contact the nearest Whirlpool authorized service center.
You may want to check the full list of Whirlpool AC error codes on this link as well:
https://acerrorcode.com/whirlpool-air-conditioner-troubleshooting.html

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/

My voltas inverter ac e4 error which is communication error.It works fine in sunny day but stops in night or rainy day and shows e4 error.

I assume it is a LG as you did not state: Try these links:

http://www.refrigeration-engineer.com/forums/showthread.php?20036-Need-help-trouble-shooting-mini-split-ac-error-code-quot-e4-quot

Anyone familiar with LG portable AC units Consumer Electronics Bob Is The...

LG Portable Air Conditioner Error Code

LG Window Air Conditioner Error Codes Sears PartsDirect

e4 error code comes for defrost. just remove the cover of your split ac, you shell found a sensor there , check for rat cut.

how to solve E4 erro in split air condenser

E4 whats complaint

E4Fault indoor coil sensor (open or closed). Replace it.

E4 error complaint whirlpool ac