Aircondition not working

E1 indicates  Filter needs replacing/Cleaning , this code flashes after 720 hours of operation time.

Disconnect the power plug

Clean or replace filter

HOLD DOWN (dont let go) Of  the ON/OFF button and plug the unit back up and continue to hold the ON/OFF button until you hear a beep

After the beep unplug your A/C

Then plug it back up to and turn it on for normal operation

IF THIS FAILS TO REMOVE THE CODE

UNPLUG A/C  THEN HOLD DOWN THE MODE BUTTON AND PLUG IT UP STILL HOLDING THE MODE BUTTON UNTIL YOU HEAR A BEEP.

UNPLUG UNIT  AND THEN PLUG IT BACK UP AND ONE OF THESE 2 STEPS WILL FIX YOUR PROBLEM   UNLESS THERE IS A MAJOR PROBLEM IN THE CONTROL BOARDS