I can't get the nozzle to lock when attaching handheld

The manual suggests removing the attachments and cleaning the spray nozzle. Got that from hoover.com

Hello! Below are step-by-step instructions for changing the belt on your Hoover S1147.

1. Rotate nozzle to the vertical position. Lift off front cover.

2. Remove the two bottom plate screws.

3. Pivot off bottom plate making sure to unhook center tab on inside edge of nozzle.

4. Remove agitator and used belt from nozzle.

5. Put new belt on agitator. Position agitator in nozzle orienting agitator end caps with slots on both sides of nozzle. The belt should line up with tab on inside of nozzle.

6. Attach belt to motor pulley.

7. Replace bottom place by first hooking it to center tab on inside of nozzle.

8. Reposition screws and front cover.

Hope this helps!

Hi! Below is step-by-step instructions for attaching your crevice tool.

1. Place unit in an upright position. Push release button forward, then pull handle from unit.
2. Remove floor tool from nozzle.
3. Attach crevice tool by inserting into nozzle. To remove gently pull apart.

Hope this helps out!

Oreck is junk, despite the ads. trade it in on a Royal and yuu problems are over.
been in the vac repair business for 20 yrs

The rubber gasket on the bottom of the 2-in-1 tank is probably lodged in the base of the unit. It should be connected to the nozzle on the bottom of the 2-in-1 tank. You can pull it out of the base and reattach it to the tank. This should stop it from leaking. The formula tank on the back has the same gasket so you can pull that out and see how it should fit on. Hope that helps.

there's a button lock on the top of the nozzle and the bottom of the vacuum where they meet. That should release the carpet nozzle from the vacuum cleaner easily.. you may have to jiggle it to get it loose, but there's a button lock mechanism that holds it in place

We have the same vacuum & had the same problem. As the vacuum ages & the hose is periodically removed from the nozzle to use with the attachments, the white switch, adjacent to the nozzle connection, wears. If the hose is not fully reinserted or if the attachment notches are inadvertently aligned with the white stitch, the agitator may not work reliably. Assuring the hose is fully inserted, with the locking notches away from the switch has eliminated this problem with our vacuum cleaner.

http://geeksquad.fixya.com/ThreadView.aspx?prdid=19674&thid=493359
No power in power nozzle
Posted by pjs5451 on Apr 06, 2008
Vacuumed with power nozzle one day working fine took attachment off to use crevice tool reattached power nozzle and no power whatsoever.

Hello,
I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure. Rainbow E Series Canister Wet/Dry Vacuum. The Rainbow Power Nozzle does have a reset button on the newer model on the top of the power nozzle, just push it and it should reset, or check all your pigtail connections to make sure they are connection and the cord leading to the actual Rainbow Vacuum itself. Out in left field might be that the power nozzle motor could be shorting out or not working or dead and might be in need of replacement. Check the cord for any frays or bad connections. If you have a problem please feel free to contact your local vacuum cleaner dealer in your area. So if you need further assistance, please feel free to contact your local vacuum cleaner dealer in your area or in the yellow pages, or contact the factory phone number or website to further assist you with your questions.
The Rainbow / RexAir Factory phone number is listed below:
http://rainbowvacuum.com Customer Service
1-248-643-7222 Monday thru Friday from 9:00 am to 5:00 pm EST
Thanks, Don the Vac Man
Go Ahead. Use Us.

Here is an exploded diagram which seems to show that the whole nozzle assembly is removed as one piece.

See if it helps:

http://www.dewaltservicenet.com/Products/DocumentView.aspx?productid=65223&typeId=14858&documentId=34001

To remedy this, I did the following:
1) Removed screws from: a) Lower area of handle (1 screw), b) Top of steamer, under round rubber flap around fill hole (2 screws), c) Front of steamer where nozzles attach (2 screws)
2) Removed back of handle, top of steamer, front of steamer where nozzles attach 
3) Once all parts are removed, you can see a brass button that is pushed by the trigger
4) Using a needle-nose pliers, grasp and rotate the button several times in both directions (you may hear it cranking against the interior spring). Do this until it turns fairly easily with the pliers.
5) Once this is done, you fill find that the brass button can be very slightly depressed with a bit of force. You may also need/want to unfold a large paper clip to push into the nozzle hole to help unsticking the brass button (not sure if that helped in my case, but it was something I tried along the way). When the brass button moves in and out (again, it won't move much), the steam release mechanism is unstuck!
6) Reassemble all parts (everything snaps back neatly into place).
This worked for my unit!