Haier model hdn455 serial number 05021110 it runs but has never taken a drop of water out of the air, so it just keeps running

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.