In all of your wrangling things around, you probably hit the mechanism that locks the door and didn't notice. That is what I did.

Try my suggestoin and reach in and push it up and down (can't remember which position is lock, and which is unlock) and you'll probably be ok.

Just make sure the hose is connected right before you put it all back together. You can always hit the lock/unlock buttons on the key fob and make it lock and unlock. Should be no big deal.

If you want to disable it, leave the hose off and leave the lock in the unlocked position - but I'd want to seal up the end of the hose in fear that debris will get into to hose and make it's way to the pump.