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Old 06-16-2014, 08:22 PM   #1
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Overhead Air Conditioning LOUD!

Had our 2013 Interstate for 2 years and finally took our first summer trip where it was hot enough for air conditioning. It appears to have only one speed - DEAFNING!

I will gladly play the part of dummy who didn't read the manual if someone can tell me this unit has a way to set other fan speeds than the one I dealt with this weekend. Compressor on or off makes no difference, the fan is like standing next to a cotton thresher. Pretty much impossible to watch a movie or speak to anyone in the vehicle with anything but a yell.

I'm surprised I haven't heard anyone else post about this. I love the Interstate but this made me really grumpy all weekend having to choose between comfort and being able to hear anything else but the air.


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Old 06-16-2014, 08:30 PM   #2
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No, you are not mistaken, and the new air conditioners are like having a jet engine in your trailer. We had a 2005 25FB for eight years. The air conditioner always worked great and you could actually hear the TV while it was running.

I don't know what happened to the good air conditioners that they used to use.


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Old 06-16-2014, 08:35 PM   #3
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The newer low profile AC's require a higher velocity blower speed in order to get the job done. Lower profile + more velocity = more noise.

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Old 06-16-2014, 08:52 PM   #4
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Turn the movie up?

Mine is loud but there are 3 fan speeds settable on the thermostat.
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Old 06-16-2014, 09:26 PM   #5
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Scratching the itch of curiosity, which is louder… the air conditioner or the generator?

But don't worry. Just turn on the subtitles for the deaf and hard of hearing on your movie, and you'll be able to read what you can't hear…
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Old 06-16-2014, 09:29 PM   #6
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The thermostat has a fan setting: auto, high, medium and low. It does make a little difference to the noise, but its never quiet - we can hardly hear the TV.
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Old 06-16-2014, 11:01 PM   #7
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I sleep with ear plugs if we have AC running while plugged into shore power. For short cool downs powering AC with generator -- it's like Protag said which is louder?
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Old 06-16-2014, 11:06 PM   #8
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I've experienced the same thing on my 2014.5. Low is loud and medium and high are very loud. I turn the fan to on so at least it doesn't toggle on and off at night waking me up.

I do have a question for folks though. If I wanted to one day change out the AC for something quieter, what are my options?
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Old 06-16-2014, 11:42 PM   #9
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I have often wondered if it might be possible to make a change to lower the fan speed to a slower speed than the low setting. I figure that would probably cause other problems such as a frozen coil or not cooling the condensing coil adequately. Not sure.
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Old 06-17-2014, 01:18 AM   #10
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Overhead Air Conditioning LOUD!

Isn't it crazy.... With the increase in technology and all I was able to sit under my forty two year old Armstrong Air conditioner and have a normal conversation on my cell phone.... And I was cold...

But it was on low fan, and it is for sure by no means low profile outside..

Still, new is not always improved....
The fact that I am opinionated does not presuppose that I am wrong......

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Old 06-17-2014, 06:07 AM   #11
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Our AC is loud, too. Always has been, and we never cared.

It would seem that...... to have a multi-function, roof AC/heat/fan unit, that is efficient, in such a small is going to be loud when you are positioned under it.

When it is 90+ outside, with humidity at or equal that level, that AC is an absolute necessity. There is no comfort or sleep without it.

On a chilly morning, the heat option brings the inside temps up very nicely.

Having the AC unit is part of what allows you to travel in your Interstate.....where you want, and when you want.

You could probably custom order an Interstate without a rooftop Unit, but it would restrict your activities.

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Old 06-17-2014, 06:20 AM   #12
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Why do you think the new 2015 ducts are such a big deal, those AC units would drive me nuts they are so loud, and out East here during the summer, they run just about all day and night.

Ducted A/C Monster Deal for Airstreams, much quieter!
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Old 06-17-2014, 07:24 AM   #13
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JFSchek, This is a discussion about the Mercedes Interstates, not trailers. I doubt that ducting is or will be available. There is not sufficient headroom to duct them. In my prior "bus" we had 3 roof airs ducted. And when i sold it last year it was 16 years old and the same roof airs were still working, and quietly I must say. I doubt anyone will ever see 16 years with the current roof airs. Recently we bought a new home fridge and a separate freezer. Quality units but the installer and the salesperson all agreed: todays refrigerant compressors are not designed to last. They're throw-aways. That's our society and world today.

And I recently read a post in a European blog that Europe is planning on banning the current "freon" 134A as it is now just as hazardous to our health as the original freon was. They are designing a new type, less harmful freon and you know it will not be retrofittable to current equipment!
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Old 06-17-2014, 08:23 AM   #14
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I guess that's why they have the option of listening to the television through the stereo speakers...
to be able to hear the TV while the air is on...

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