Good Sam Club Open Roads Forum: Class A Motorhomes: roof air
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Old Blue

New York USA

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Posted: 07/18/19 06:25pm Link  |  Quote  |  Print  |  Notify Moderator

We have two roof air conditioners, Dometic, worked well while in Florida, came home in January did not use until this week, 7-12. When we started them up, outside temp high 80's to 90's there was a odor, like wet towels or something like that, not a bad smell just a different odor. Has anyone had this problem and if so what to do?
The M/H 36 ft. Holiday Rambler with four slides 2007 year.
Thanks
Bill


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louisiana

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Posted: 07/18/19 06:54pm Link  |  Quote  |  Print  |  Notify Moderator

You need to clean them

MountainAir05

New Mexico

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Posted: 07/18/19 06:58pm Link  |  Quote  |  Print  |  Notify Moderator

along with the clean, need oil the motors bushing

chuckftboy

Fleming Island, Florida

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Posted: 07/18/19 07:49pm Link  |  Quote  |  Print  |  Notify Moderator

How ofter do you clean the filters. They should be cleaned every month when in use. The dirt thay gets past them will make the evaporator coil smell pretty bad after a short time.


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Old-Biscuit

Verde Valley

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Posted: 07/19/19 12:10am Link  |  Quote  |  Print  |  Notify Moderator

Mildew from the FL Humidity......Evap Coil, Discharge plenum/ducts
Cleaning required


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wa8yxm

Wherever I happen to park

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Posted: 07/19/19 05:34am Link  |  Quote  |  Print  |  Notify Moderator

MountainAir05 wrote:

along with the clean, need oil the motors bushing


Two universal issues with Roof Air (And for that matter most all air) is this. The air intake filters get dirty and clogged leading to all sorts of issues (not this one however)

And water and debris can settle in the drip tray and water path leading to this issue

Remove outer cover and clean clean clean

You may also need to remove the inner cover over the evaporator (Cold end) and clean the rest of the tray

You may also have a dead rodent in an air duct.


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wolfe10

Texas

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Posted: 07/19/19 06:35am Link  |  Quote  |  Print  |  Notify Moderator

Yup, you need to clean the EVAPORATOR. Done from on the roof.

Get a commercial evaporator cleaner from any box store.

Stuff old towels/rags in the duct to the coach so you don't get cleaner or water down in the coach.


Brett Wolfe
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ferndaleflyer

everywhere

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Posted: 07/21/19 07:51pm Link  |  Quote  |  Print  |  Notify Moderator

Is it safe to blow out the drain hose at the a/c from under the unit (behind filter) or should I go on top to do that and clean out the evap pan also?

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