air conditoner vibration

dtravler · 01-03-2012, 10:58 AM

Owner of a 2005 Itasca Meridian 39F, Has anyone any info. on what might be done to dampen the vibration of the basement central air unit. The unit works great for cooling, but you wont get any sleep in the bed room with it running. Any info would be helpful. Thanks.

garyedgecomb · 01-03-2012, 01:22 PM

If you can get to it, look for trash in the squirrle cage fan. Even a small piece of paper can cause vibration. This is the fan that circulates the air.

dtravler · 01-03-2012, 01:44 PM

Thanks for the reply. The fan is clean, bearings are tight, no play in the
fan houseing. It seems like the compresser is bolted straight to its frame, and that frame is bloted straight to the motor home frame.
I had some what of the same thing when I had a heat pump put in. The idiot that put the tubing in under the house put the tubing straight against the
floor beams with no cushioning. Every time the unit turned on you got a nice vibration through the floor beams. Had to crawel under the house and fix right. Feel like I'm up against the same issue.

Davel · 01-03-2012, 02:13 PM

dtraveler,

Our '04 Adventurer has the same issue. I finally got one of the A/C factory reps to admit that some coaches have a issue with "harmonizing" between the two compressors. It's kind of a rolling roar that varies over time. He said they have tried everything to fix it with little luck. It only affects a few coaches. I removed mine this summer to replace bearings and clean the unit. I also updated the outside fan to a plastic model that was supposed to be quieter. Nothing was loose that I could see and there was little if any improvement. Sorry I don't have better info or a solution....

Good luck,
Dave

jackrobinryan · 01-03-2012, 02:23 PM

I have the same rhythmic "thrumming" sounds when two compressors are running. Kind of levels off after a while or one compressor shuts down.

The only thing that works for me, a light sleeper, are foam earplugs from Lowes while I sleep. Which I use anyways when I am home.

good luck
jack

the4js · 01-03-2012, 07:41 PM

Any chance you have a refigerant leak? If its low on charge this will make the compressors run harder thus creating vibration and higher amp draw.

Just a thought.

Chuck 1935 · 01-03-2012, 07:50 PM

Mine does the same thing only I sleep like a baby knowing that if it keeps me awake I'll have alot of work to do. So for me it's "Rock a by Baby in the Tree Top"

DAN L · 01-04-2012, 02:10 AM

Quote:

Originally Posted by dtravler

Owner of a 2005 Itasca Meridian 39F, Has anyone any info. on what might be done to dampen the vibration of the basement central air unit. The unit works great for cooling, but you wont get any sleep in the bed room with it running. Any info would be helpful. Thanks.

my basement ac is kinda noisy with both compressors running, sorta like they are not in sync.

when we want to sleep, i turn off my #2 compressor circuit breaker on the 110v panel.

with less than half the noise we can sleep ok.

doorguy · 01-04-2012, 07:29 AM

DAN L has the answer. It is an inherent problem with basement a/c since it is always located in the rear where the bedroom is. I, too, discovered that if I turn off compressor #2 at night it is much more tolerable. At night, you probably won't need the 2nd compressor as you don't have the heat of the day beating on you. Just remember to flip it back on during day use.