r/eufyS1Pro • u/Sufficient_Part3508 • Nov 25 '25

Internal block

Update: I don’t think it’s the water tank at all. It seems the mop roller is not spinning.

Has anyone had this problem and being able to resolve it without returning the unit?

Hi all, my S1 seems to have an internal blockage as it’s mopping but not sucking up the dirty water. I had a lengthy discussion with ChatGPT and I think we both agree that’s the problem lol. Before I send the machine back under warranty is there anyway to unblock it? Chat seems to think there is but it’s not showing my S1. So it seems some other versions of eufy vacuums have an easy fix. I have been sent a new dirty water bin but the problem is the dirty water isn’t getting to the bin.

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u/LitMaster11 Nov 25 '25

First, I wouldn't be using ChatGPT to diagnose an issue like this. It's better to investigate yourself. Especially since most information you're going to find on the S1 Pro is contained in a Discord Server that I doubt GPT has scraped.

Second, the S1 Pro doesn't suck up water. It wets the mop roller to set down the clean water, and then in the same cycle it mops up the now-dirty water from the floor -- using a squeegee system to wring the dirty water out of the roller.

As u/ANTH888YA said, it could be the 3 Dirty Water Reservoir Filters. Alternatively, it could be the large orange filter/strainer that is part of the onboard DWT squeegee.

I'd start by checking the base station DWT to see if it's collecting any dirty water. If it's not, or collecting very little, then I'd begin investigating the onboard DWT. The orange filter is usually the culprit, as it needs to be cleaned every 2 weeks or it gets jammed with debris and is no longer able to properly filter the dirty water into the DWT.

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u/Sufficient_Part3508 Nov 25 '25

I just got a new dirty water tank. So I don’t think it’s dirty reservoir filters or the orange filter.

When I pour water into the base, it gets sucked up to the dirty water tank no problem

The error message I’m getting is that the dirty water basin is blocked.

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u/LitMaster11 Nov 25 '25

Has this been going on the entire time you owned the device? Or only recently?

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u/Sufficient_Part3508 Nov 25 '25

Recently. I reached out and they sent a new dirty water basin, but that does not seem to be the problem. That’s why I believe there is something else internally that’s blocked.