Lennox Central Heating and Ac Cause Whole House To Vibrates

by Pam
(Houston, TX)

We bought a home in 2004, it was a NEW home and the builder installed Lennox Air Conditioning in the subdivision. It cools the 2490 sqft house wonderfully, and we have not had any problems. That is not the end of the story though.

We are looking for advice on this problem because the repair crew has been out three times and they can't find any problems. It does not have any problems cooling or heating. The one problem we have is once every two weeks or so when the unit turns off, the whole house vibrates for about 10-15 seconds.

Naturally we can't get this to happen when the repair crew is there that is why it is so hard for them to find the problem. The unit part that vibrates is in the attic and when it happens in the middle of the night it is an awful feeling.

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Lennox Elite NEW
by: Jay

Anyone find ANYthing to stop Lennox Elite from vibrating whole house? Bought house in October...didn't notice vibration when heat was on...but now getting warmer weather AND getting less and less sleep as Lennox Elite vibrates entire house when Ac is on. Have tried sleeping in every bedroom...no luck. Exhausted! Would be grateful for ANY suggestions.

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Tired of vibration NEW
by: Anonymous

We replaced AC in 2015 . Did away with heat pump. Installers didn't run any new duct work due to basement being finished. They used existing heating A/C duct work. AC ran fine. When we turned on furnace it sounded like person inside duct work trying to beat their way out. Repair man came and removed small valve stem looking rubber piece that fell into furnace during installation of AC. Once it was removed furnace vibrated(s) like crazy. Repairman replaced motor and vibration is worse than before. Frustrated. This is also Lenox furnace installed in 2007 built home.

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vibration NEW
by: FAA REPAIRMAN

I had a piece of the internal insulation break away from outer panel and get caught in the fan, or hampster wheel as I call it causing it to go out of balance causing vibration. Cleaned it out and ran smooth.

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vibration NEW
by: FAA REPAIRMAN

I had a piece of the internal insulation break away from outer panel and get caught in the fan, or hampster wheel as I call it causing it to go out of balance causing vibration. Cleaned it out and ran smooth.

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AC casuses the Whole house vibrates NEW
by: Anonymous

Have they made sure that the system is balanced from the low pressure to high pressure side(IE. return air to exhaust air.
Its easy to find out, just remove the side panel and if the system quits down, then you know they never balance the system!

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Clogged or stuck dampers
by: Did it myself

Sounds it may be a stuck damper. Run the system with the the blower fan open. Then close it up if you feel outward pressure you have a clog or stuck damper. If it sucks the closure in then the airflow is running correctly then listen for sounds from the blower fan

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Virbration in House
by: Swampman

Since there are a very few moving parts in the handler, the motor, blower, and an expansion valve, I would say that the blower is loose on the motor shaft. Or it has become out of balance. Ever see a washing machine "dance" when the tub was out of balance? Sounds to me that the blower case or motor have something out of alignment. Also check to see that you have the proper tension on the belt driving the blower case (if there is one). The motor can "hop" up and down as slack runs in and out due to a loose belt. Do you all hear any noise when the unit starts?

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House Vibrates
by: Dadan

So, the technician pinpoints the cause and it is the indoor motor is causing the vibration. I seem to find it difficult for a small indoor blower motor to causing the vibration. I understand the speed of the indoor motor can cause a vibration in the ductwork.

It sound like to me; it is not the Lennox or Trane central ac is causing the vibration. It is part of the house which is holder the air handler unit is causing the vibration. The air handler is not place in correct location.

You had the furnaces raised off the attic floor and it somewhat reduce the vibration. What happen if you didn?t raised the Trane furnaces off the attic floor? Was the air handler place in the strong platform?

You could call your previous owners and ask them if the central ac had always caused the vibration.

The compressor does produce sound. I?m not sure if a sound from the compressor could have an effect on the structure of the house.

Dadan

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Another Vibrating Lennox in Houston TX
by: Anonymous

I also own a newer home (by Newmark) in Houston TX. The home was built in 2006 and we purchased it from the original owner in 2009. We too have 2 Lennox Central AC Units.

The vibration is so bad you can't sleep because you can feel the vibration through the mattress when the downstairs unit comes on. It doesn't stop... the vibration lasts until the unit shuts off.

There is nowhere in the house that you stand or sit that you can't feel the vibration in the floor, seating, bed, you name it. From any place in the house, I can tell you the second the downstairs unit kicks on or turns off.

We replaced both furnaces in the attic last summer in hopes that would remedy the situation. It helped a little but not enough to justify the cost. We replaced the Lennox furnaces with the best Trane units available.

We also had the furnaces raised off the attic floor to prevent wood to metal contact. The vibration in the upstairs bedrooms is still terrible. The furnaces are located just above the 2 largest secondary bedrooms.

The HVACs company that replaced the furnaces has looked everything over and can't provide any solution. Does anyone have a solution or ideas on where to start?

Thank you!


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House Vibrate
by: Dadan

This is serious problem and I’m not sure I know which part of air handler could cause the entire house to vibrate. The only vibration I thought of is old loose fan. I doubt a fan could make the entire house vibrate.

P.S
It possible the air handler is near a support member of the attic.

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