How do you hook up drain hose to model HDN455 RB

looking at the back of the machine there is a plastic female hose connection just above the top of the reservoir.

continuous drain option, So was there a plug in the end of pipe, did you remove it, does your pipe run down over, has to. Not a lot between bottom of unit and floor, But pipe has to go down over, if up and down, will not drain. down all the way

The drain plug should be on the rear of the unit about 1/2 way up the back of the unit. It has a screw off cap and rubber plug. Keep these & don't lose them. You will need them, whenever you stop using the hose drain. Most folks put them in the water bucket for safe keeping.

The garden hose can not exceed 48" in length and slope down and straight to the floor drain. Drainage relies entirely on gravity.

Hope this helps you and thanks for choosing FixYa.

The problem, may very well be, that the humidity extraction level is set too high. Lower it to 35% and see what happens. Keep in mind, the lower the percentage of the moisture/humidity setting, the more it extracts from the household air. The higher the setting, the less it extracts from the household air.

Also, remove and check the air intake filter to see if that needs to be cleaned. It should be cleaned at least twice a week during the operating season.

Hope this helped you troubleshoot and solve the problem. Please let me know. Thanks.

dehumidifiers work by cooling down so that warm moist air will condense has it stopped working ?

First, the hose should not exceed 5 feet in length. There is no pump in that model dehumidifier. It relies totally on gravity to drain through the hose.

If all of the above is as stated above, I suspect that hose or the tubing inside the hose connecting is clogged. Which forces the water into the bucket rather than the hose.

To remove the clog in the unit, you will need an 18" long plastic Zip Tie or something similar, that is appropriately sized to fit into the hose connection/drain hole. NO wire coat hangers though.

Carefully feed the Zip Tie in to the hose connection. About 6" in the tubing will bend. You need to gingerly work the Zip Tie past this bend, until the Zip Tie bottoms out or you run out of Zip Tie to work with. The slowly remove the Zip Tie while rotating it. This will breakup clog. As you near the end of the Zip Tie coming out, be prepared for some water to follow. DO NOT perform any of this while the unit is plugged in to the wall outlet.

Hope this helped you solve the problem, Robert. Please let me know. Thanks.

it should be in the same area where you pull the pan out to dump. There should be a hose hook up inside the space where the drain box is.

Check your model number again, Haier doesn't recognize this number.

presence of oil indicates a leak in the pipework somewhere. not worth repair

Float switch is stuck, has a broken spring or the actuator arm is bent