Delonghi PAC L90 (by 4 users)

fe means the water tank is full of condensation you need to take out the tank and empty it

The probe is located on under the main board low inside the only silver metallic box on the bottom w circuit board under it.Remove cover and immediatly you see a 4 inch black wire connected to the main board tucked under and mounted.Unplug the white connector from board, power on, then carefully plug the white connector back on, turn unit off and back on, you should see all 3 mode lights now on steady , no pf error and it doesnt turn off,and you can change modes and temps.Took an hour to take it part and dig around, mine works fookin great now.

Try www.delonghi.com, or go to Lowes and see if they still have one and ask the service desk to copy the english portion.

Not exactly true. My unit not been on for 6 months (ran last time it was on), got PF msg upon power up after long power off spell, tank is bone dry, and been that way for months, and when I transported it to fix it, it was laying on it side in my car and nothing spilled, inside our out, nothing sloshes around.