How to Fix a Sebo X4 Vacuum Red Bag Light PCB Fault

By | February 17, 2026

If you have a Sebo X1.1 (which, be aware, differs from an X1), an X4 of any model variant, or an extra-wide X5, and your ‘bag full or clog light is on, you may have a PCB fault. We’ll show you how to get to the bottom of it and what you need to fix it.

So the machine is telling you it needs a new bag (the red bag light is on), but you have changed the bag, and it’s still doing it.

Before we delve in, we need to make sure the machine isn’t blocked. You’d be surprised how many are. So check first >>this article and video<< (which should open in a new tab) – and come back and continue here when you are 100% sure it isn’t blocked.

How to Fix a Sebo X4 Vacuum Red Bag Light PCB Fault

So, we now know the machine isn’t blocked. So there are two possibilities:

  • The main PCB is faulty
  • The main PCB needs adjusting or resetting

At this point, you need to remove the hood to establish which PCB is fitted to your machine, because that determines how you will fix it.

To remove the hood, undo the four screws in the recessed holes underneath using a Philips screwdriver.

Sebo bag light reset

Recline the neck.

How to Reset the Bag Full Light on a Sebo X1 or an X4

Now the top comes off. Look at the PCB; there are two types.

 

How to Reset the Bag Full Light on a Sebo X1 or an X4

If yours is marked NPPSTXSM-2 and/or (5740) like the one above, or has 94VO on one side and 5196-F or TE3493 (Stein and Co) on the underside, read instead >>this article<<. You can usually turn that light off quite easily in a few minutes, with a screwdriver.

However, if your machine is fitted with this PCB:

How to Fix a Sebo X4 Vacuum Red Bag Light PCB Fault

That one is marked 5849ER and NPPSTXSNM-3. That board is usually fitted to all 1100w Eco and Boost models.

If your machine has that board, and the bag light is on when the bag isn’t full, or the machine isn’t blocked, you have four options:

  • A new board
  • A new pair of boards (see below as to why)
  • Have your old board reset
  • Replace both PCBs with the earlier type (as long as it is not a Boost model –  on Boost models, you must replace like with like).

Which is better? Any option will work; it depends on how fast you need it, how much you want to spend, and which you prefer.

If you want a new board, you can find that >>here<<. Some people prefer to change both boards together, either because they’re uncertain which one is faulty, or because they reason that since the boards are the same age, the other may fail soon. Buying a new pair isn’t much more expensive than buying one, and you can find those >>here<<.

As long as your machine doesn’t have a Boost button (It’s mostly the 1100w X4 black Pet Eco that does), you can also choose to fit an older, recycled pair of boards, which you will find >>here<<.

Or, there is a cheaper option: If you can do without your machine for a few days, you can send us your old board (please don’t use Yodel or Evri), and we will reset it in our workshop and mail it right back to you. That costs £30 including return postage. If you want to have your board reset this way, do the following:

Important: Open our service slip by clicking the button below (it should open in a new tab):

Click Here to Open the Printable Service Slip

Print and fill in that slip and enclose it with your parcel. If you don’t do that, we won’t know where or from whom the parcel has come. If you don’t have a printer, enclose a note with the same information on. And make sure it’s legible, please!

We’ll reset it and send it right back. In the unlikely event it won’t reset, we’ll call you and advise on the best and most economical option depending on current stock and your machine’s exact model. We might have a good used board handy or offer you alternative boards. Either way, we’ll soon get your Sebo up and running again. But the vast majority of 5849 boards showing a false bag light can be reset.

If you’re a vacuum repairer, collector, or DIY fixer, and you really want to go down the rabbit hole on Sebo PCBs, our video below will tell you everything you might need to know about Sebo X-series PCBs, from the X1 to the X8 and XP30.

If you need further help repairing your Sebo yourself, visit our >>free advice forums<< where you can ask questions and get expert help. Prefer to send or bring it in for repair? Find out about our repair service >>here<<.


The Sebo Shop at Manchester Vacs are approved Sebo dealers offering next day UK delivery on all domestic and commercial Sebo vacuum cleaners. You can shop for Sebo commercial vacuum cleaners and accessories by clicking the banner below.

The Sebo Shop