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Kirby Low Suction

My Kirby Sentria has suddendly lost almost all of its suction. This is true with or without the power-assisted brush unit on the front. The tube inside the bag area is not clogged with anything.

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Have you checked the fan? It is what creates the suction. If ok, then you may have a motor problem, sometimes they run but not up to speed, then suction is lowered when that happens.

Posted on Mar 13, 2008

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1 Answer

There isNo suction on Kirby sentria


  1. Put the hose and see if suction is good. If it is - you may have had nozzle installed wrong or brush roll may be worn out (bristles must be sticking out of the nozzle by about 1/8 of an inch).
  2. If there is no suction with the hose either - check if bag is not overfilled to the point where dirt is blocking the fill tube hole.
  3. If two above are fine - something must be blocking the air passage from the fan to the bag. Check for clogs in the fill tube (tube inside the cloth bag) and mini emptor (bag bottom plastic part) and also see if there is something blocking the exhaust on the vacuum. You may not even see it so use a piece of wire. Once I found a sock there and it was so close to the fan that I could not see it in the hole and was only able to get it out using a homemade hook made from a coat hanger.
how to check for a clog in your Kirby

GoodVac.com Technician
www.goodvac.com
1-800-775-6586

May 28, 2014 | Kirby Ultimate G Bagged Upright Vacuum

1 Answer

How do I fix suction on kirby sentria upright vaccum


  1. Put the hose and see if suction is good. If it is - you may have had nozzle installed wrong or brush roll may be worn out (bristles must be sticking out of the nozzle by about 1/8 of an inch).
  2. If there is no suction with the hose either - check if bag is not overfilled to the point where dirt is blocking the fill tube hole.
  3. If two above are fine - something must be blocking the air passage from the fan to the bag. Check for clogs in the fill tube (tube inside the cloth bag) and mini emptor (bag bottom plastic part) and also see if there is something blocking the exhaust on the vacuum. You may not even see it so use a piece of wire.
GoodVac.com Technician
www.goodvac.com
1-800-775-6586

May 20, 2014 | Kirby G3, G4, G5, G6, Ultimate, Diamond,...

1 Answer

Kirby ultimste g series green light?


that means its working properly. If you have no suction then it is usually the belt and or the bag. so make sure your bag is not full , make sure everything is attatched properly and the green light is on.... The Kirby is the best vac out there and little suction should never be a issue for us.. I am a proud owner of the sentria..Love it..

Jan 21, 2013 | Kirby Ultimate G Bagged Upright Vacuum

1 Answer

No suction from my kirby sentria


I just took a stiff piece of coax cable, and took the bag off where it attaches to the main unit, and took the head off ( the part with the brush roll in it) AMD cleaned every thing really well, turning the spindle for the fan while " snaking" it and pulled out a baby sock! Ta-Da! Works like New.

Apr 29, 2012 | Kirby Ultimate G Bagged Upright Vacuum

1 Answer

I have a kirby sentria. vacuumed up my son's headphones and immediately shut if off. took brush off, unwound headphones, put it back together. when i turned it back on, the belt snapped. so i went to...


Take the front off the vacuum and check inside both the front portion and the canister for additonal clogs. Sometimes something will get caught in the impellor, causing the motor to overheat. Since there's little suction and the smell, I'd guess this is what happened.

Jan 30, 2011 | Kirby Generation 3 Bagged Upright Vacuum

1 Answer

My Kirby Ultimate G does not have enough suction to pick up pet hair. Is there anyway this can be corrected? I felt under the vacuum when it was running, the roller is running, but I felt very little...


An Ultimate G has lots of suction. If you turn on your vacuum and the bag immediately inflates - that is how you can tell if your Kirby is moving air (suction). There is a more modern brush that came out with the Ultimate G Diamond and the Sentria that has stiffer bristles that dig up pet hair better.

Another way to test the suction is to spread some baking soda onto a hard floor and vacuum it up - you can see how much suction your Ultimate G has, or take off the vacuum head and put on a hose and test the suction at the end of the tube.

Ways to increase your Ultimate G cleaning efficiency. Take off the vacuum head and remove the brush roller. Attach your hose attachment and **** vacuum out the head. Put on a new belt, and remove any hair and or string or threads that may be wrapped around the brush roller. Put the roller back on and on the ends of your roller you will see that the ends spin and have numbers on them. If your vacuum brushroll is original - you could have your bristles rather worn and so you can align the #3 on BOTH sides of the brushroller. This would be a good time to consider upgrading to the Sentria Brush.
Remove the bag, and replace with the CLOTH Kirby bag. It has the best filtration and it has the best airflow (which increases what you are referring to as suction). If you want to go the cheap route - at least get the paper Micron Magic with HEPA filtration (but it has slightly less air flow)
Remove the side mini emptor from the vacuum and check to see if there is anything clogged up on either the vacuum or the mini-emptor.
If your engine is running and inflating the bag and you replace the belt, the brush roller and to the cloth dust bag - your vacuum should pretty much run like a brand new Sentria Vacuum. Your vacuum system is outstanding, but may benefit from a little TLC if you have been neglecting it.

Mar 19, 2010 | Kirby Ultimate G Bagged Upright Vacuum

1 Answer

Hose for G3 Kirby doesn't fit Sentria


Yes G3 and G4 had different gasket thus the suction blower connector connecting Kirby hose to the unit on later models is different. You do not need to replace entire hose but just the plastic part that connects to the vacuum. You can find it HERE. To remove old connector you may have to submerge the end of the hose into hot water (not to hot to touch) so the vinyl becomes soft and you can bend it in with finger bringing plastic end over the lip on the molded end of the hose.

Good Luck

Jan 30, 2009 | Kirby Ultimate G Bagged Upright Vacuum

1 Answer

Kirby G4 without suction


change your belt, if there is suction from the hose, and you cant see any blockages in the area where the brush roll is then you need to change the belt, even if it isnt broken. putting your hand over the nozzle to feel the suction is not the way to tell if it has suction.

Oct 15, 2008 | Kirby Ultimate G Bagged Upright Vacuum

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HERE is the shampooer manual. There is no suction involved picking up the water. It simply scrubs the solution off the rug and throws it in the tray in front of the Kirby vacuum.

Jul 19, 2008 | Kirby Ultimate G Bagged Upright Vacuum

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you have to make sure the green light is on.. in the corner .. and if it is that means its working properly. If you have no suction then it is usually the belt and or the bag. so make sure your bag is not full , make sure everything is attatched properly and the green light is on.... The Kirby is the best vac out there and little suction should never be a issue for us.. I am a proud owner of the sentria..Love it..

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