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Old 08-04-2012, 03:33 PM   #1
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New front AC in my Columbus

Spent our first night in our Columbus 320RS since the new bedroom AC was installed. Big difference. When my wife heard it, she couldn't tell the difference at first, though. She found the following explaination helpful.
There are actually two noises generating from the AC.
1) The blower. The noise from the air being forced out of the AC unit can't really be changed, other than closing the quick cool vent or changing the spped of the fan.
2) AC compressor. In our old AC, when the compressor cycled on, not only was it loud, it vibrated through the frame of the trailer. The compressor in our new AC unit was hardly noticeable when it cycled.
It is definitely an improvement and provides the right amount of "white noise" when sleeping, as well as keeping the room C-O-L-D!
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Old 08-04-2012, 04:39 PM   #2
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We had a kit installed in ours and is very quiet!! So much better.
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Old 08-04-2012, 09:16 PM   #3
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Bedroom AC

Same here, first trip out with our new front AC, St. Augustine, FL. They both actually don't run all the time. Sitting in the living room, 73 degrees, wife watching TV in front, with AC running.

Lost my water heater door, somewhere on I-95. Never had that happen...
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Old 08-07-2012, 09:54 AM   #4
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We had grommets added to our bedroom a/c and it did make it so much more quiet but now we are thinking what is quiet? Of course the living room a/c is very noisy when the vent is open and blowing down on the couch so we closed it off but very little was coming out of the first vents and nothing out of all of the other vents so we suspected some type of a clog. Saw pictures on another thread and Ervin opened ours up and the openings to force air to the vents was covered with the foil tape. He opened these up and now we have air going to all of the vents and it is so quiet while watching tv and talking so now our bedroom a/c sounds loud and some vibration with the l/r so quiet. So our question is, how quiet is quiet for front a/c? Another question - when door is closed you can see daylight by the door jamb so does anyone have any ideas how to get the door more plumb?
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Old 08-12-2012, 07:32 AM   #5
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We had the new bedroom AC installed yesterday - spent an hour shopping while they did the work. While they were replacing it, they found a leak in the duct work and said probably 30 to 35% of our AC was leaking out into the ceiling space (attic for lack of a better description). They fixed that too.

The best I can describe...having the grommet-kit-fix installed reduced the noise 50 or 60% (especially the vibration of the bedroom/bathroom wall and the wall where the thermostat is), and having the unit replaced probably reduced the overall noise another 20 to 25%. Amxpress - we haven't slept under it yet (will next week) but I think you're right about the right level of white noise.

Dometic sent the replacement with a white shroud - thankfully our dealer's service manager pulled the black one and replaced it so they still match. I would not have been happy with one black and one white shroud.
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Old 08-13-2012, 10:05 PM   #6
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Thanks for update. Just got back from goliad sp and need to get touch with dealer to fix things they never did and we think we will insist that they put in a new unit for us. Since we opened the ducts in living room we donot get that blast of cold air on the couch the air actually comes out of all the vents which makes it so much more quiet but now you notice the vibration of the bedroom unit. Have you ever noticed hot air coming from the vent in the under cabinet to the left of the sink. Never noticed it before.
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Old 08-14-2012, 07:14 AM   #7
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The hot air that I've noticed is actually from the heater. I did discover that if I have my thermostat set on "auto" and let's say 74 degrees for the AC but 76 for the heater, the AC will come on and cool it down to 74, and then the heater will immediately come on to warm it up to 76.

So - I keep my thermostat set on COOL for the summer and HEAT for the winter and forget about the AUTO setting.
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Old 08-14-2012, 07:31 AM   #8
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Quote:
Originally Posted by rjshiflet
We had the new bedroom AC installed yesterday - spent an hour shopping while they did the work. While they were replacing it, they found a leak in the duct work and said probably 30 to 35% of our AC was leaking out into the ceiling space (attic for lack of a better description). They fixed that too.

The best I can describe...having the grommet-kit-fix installed reduced the noise 50 or 60% (especially the vibration of the bedroom/bathroom wall and the wall where the thermostat is), and having the unit replaced probably reduced the overall noise another 20 to 25%. Amxpress - we haven't slept under it yet (will next week) but I think you're right about the right level of white noise.

Dometic sent the replacement with a white shroud - thankfully our dealer's service manager pulled the black one and replaced it so they still match. I would not have been happy with one black and one white shroud.
Duct work plenum missing in ours to !
Air flow loss was dramatic !
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Old 08-14-2012, 04:41 PM   #9
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Duct leak

Can you give more details on how to check for a duct leak? Plenum?

When running our front AC unit, I noticed the closet light had cold air comming from the sides. I assumed but have not confirmed a leak.

One other thing I noticed is that one of the bedroom ceiling vents, closest to the head of the bed, has light comming through, the other does not.

I would like to know a little about this issue before raising it with my dealer.

Are either of these a symptom of a duct leak/connection issue?
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Old 08-14-2012, 09:35 PM   #10
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We noticed light coming from the ceiling vent in bedroom but went into bathroom and covered ceiling vent and it disappeared in bedroom. It was the light from the skylight and also the floor vent by sliding door went into bathroom and covered floor vent and it went away in bedroom. We noticed if you close glass doors at shower and hang two towels over them it sure cuts down on the heat from the skylight. We have noticed light coming in one spot from the vent over the couch. We thought that might be a leak. Dealer left one of their mirrors in our unit do we will use it to look for leaks.
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