I know that modern dryers often use a humidity sensor, and I can imagine that it's maybe hard to project that.

But I don't know what sort of sensors or dynamic wash time a washer would use. I thought that they were just timer-based.

kagis

Oh. Sounds like they use water level sensors and time to drain is a factor, so if the draining is really slow, that it'll do that.

https://old.reddit.com/r/mildlyinfuriating/comments/1dd4k6g/my_clothes_washer_has_had_one_minute_left_for_the/

My clothes washer has had one minute left for the past 7 minutes. (i.redd.it)

Funny... Someone else had a similar issue a few days ago. This was my reply to them:

This sounds like a drainage issue. Not uncommon. I first learned of this on my previous washer several years ago.

The machine took a lot longer to drain than it should have, so what should've taken a minute or two, took 15.

A potential cause is that your drainage filter is clogged. Most people don't even know they have one, much less how to clean it.

In MOST modern washers, it's behind a small hatch on the front of the machine. (It may be located elsewhere, depending on your model.). Open the hatch, pull out a short hose, unplug the stopper on the hose to drain any excess water (into a small container of some sort). Then remove the filter...

The filter itself is typically a cylindrical piece that resides next to the hose. The filter may need to be unlocked somehow to remove it, but either way, once you slide it out you can clear it off of any buildup of hair, lint, and other gunk that's collected on it.

Check your user manual (or Google) for your specific model.

If they have a display capable of it, might be a good idea for washers to suggest to the user that it's draining slowly and that checking the filter might be in order.