I'm trying to figure this out because ours work fine. And trust me, with four cats and three dogs, we use it a LOT.
What's going on in your basement? I was partly able to replicate your problem by leaving the sliding vacuum cover open in the motor unit. This is where you would plug in the hose if you were using it outside (like when I vacuum the truck interior). When left open, it did not blow inside, but did not offer suction inside at the kick plate.
Another thing about that motor unit and the dust bags: The motor unit is mounted in the basement wall sideways, so when you put a new bag in, the arrows don't face "up" as illustrated; they will face to the left. This is probably obvious to most users, but it fooled me the first time.
Joan & Angus Campbell
Building in Las Cruces, NM
2019 Pinnacle 36SSWS
2019 F350 DRW Lariat CC Long Bed Diesel "Sheila"
3 Chihuahuas and 4 cats
We don't camp, we don't glamp, we LIVE.