F4 Error Code on Whirpool ADP5966 Home › Forums › Public Support Forums › Help And Support › Dishwasher Help Forum › F4 Error Code on Whirpool ADP5966 This topic has 1 reply, 2 voices, and was last updated 21 years ago by admin. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts April 10, 2005 at 1:04 pm #8927 adminKeymaster Can anyone help? Error code F4 but have checked filter which is fine and water being pumped away as normal. April 10, 2005 at 2:59 pm #131168 Dave_ConwayParticipant Re: F4 Error Code on Whirpool ADP5966 F4 is a not draining fault. Are you sure the water is being pumped out quickly enough ? It may be worth checking the point where the waste hose connects to the sink trap (if it does connect that way of course) for blackages and restrictions. Dave.l Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In