Miele W1986 draining very slowly
Hello--I have a Miele W1986 washer. A couple of times recently it seems as though it's taking a bit longer than the time shown to run a load. Today I noticed it read 30 minutes remaining, and then a few minutes later it still said 30. I pulled the drain hose out, and the water was barely trickling out. I'm not sure, but it could have been at the end of the draining. All I know for certain is that it stayed on 30 minutes remaining for a few to several minutes.
I did unscrew the drain/lint trap thing at the bottom left of the front of the washer. A cup or two or so of water came out when I unscrewed it, and It was clean. I never even checked that thing until a couple of months ago. I don't remember why I checked it then. Maybe it was a warning light. The machine has never backed up or spilled on the floor (if that is even possible). I don't think it's doing anything else wrong, except that it was showing over-sudsing a few times about a month ago. I think that was my detergent.
I bought my W1986 new in 2004 and have never had to service it. I live alone, so it saw lighter-than-normal usage for six years, but, in the last two, I've been sitting pets and it's seen noticeably heavier usage. I shake things out, but I'm sure more than a little dog hair goes through.
I'm thinking one of several things is going on: (1) nothing is wrong and that just happens sometimes; (2) there is a clog somewhere other than that lint trap/drain thing (and I wouldn't know where); (3) the pump is going out and that's causing the machine to drain slowly; or (4) it's something I don't know anything about and can't even guess.
My W1986 has always done a good job. The door on it is slightly loose, so I no longer "slam" it shut in recent years. I just push it closed with my knee until it latches. Other than that, there have been no problems. I've never had to disconnect or move it, either (so maybe there could be something in the hose?).
If it needs servicing, I gather it is probably worth fixing. I imagine it could cost a few hundred dollars or so for a repair. I'm the type that is more likely to replace than fix an appliance as it gets older. But I think a Miele washer is supposed to have a very long life, and maybe that would be equivalent to replacing a car the first time it needs new brakes. Thoughts?
Do any of you have any suggestions/advice about what could be causing this problem? Any similar experiences?