Trailer Life Magazine Open Roads Forum: Class A Motorhomes: roof air
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choppermtn

pigeon forge , tn

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Posted: 08/13/19 06:12pm Link  |  Quote  |  Print  |  Notify Moderator

I need to replace my roof air . I have replaced one before but this one is ducted and has no access from the inside of coach How do I remove the roof unit to replace it?

wrgrs50s

Scurry, Tx

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Posted: 08/13/19 07:05pm Link  |  Quote  |  Print  |  Notify Moderator

I dont know the answer, but my guess would be that it's somehow clamped to the roof from the topside. I'm curious myself.


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shastagary

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Posted: 08/13/19 07:45pm Link  |  Quote  |  Print  |  Notify Moderator

where is the air intake and the air filter? that's where the access should be what is right under the ac unit on the ceiling?

choppermtn

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Posted: 08/14/19 05:45am Link  |  Quote  |  Print  |  Notify Moderator

The ceiling is smooth with small round intake and blower holes throughout the rv .Nothing below the unit.The intake holes have small filters in them.

A1RVTraveler

North Carolina

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Posted: 08/14/19 05:49am Link  |  Quote  |  Print  |  Notify Moderator

There will be four lag bolts that mount through the AC unit into the roof. You will need to remove the AC cover to see them.

12th Man Fan

Flower Mound , Texas

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Posted: 08/14/19 07:23am Link  |  Quote  |  Print  |  Notify Moderator

A1RVTraveler wrote:

There will be four lag bolts that mount through the AC unit into the roof. You will need to remove the AC cover to see them.


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oldave

Tx

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Posted: 08/14/19 09:02am Link  |  Quote  |  Print  |  Notify Moderator

choppermtn , you should give some info so someone can know what you

are working on . Tell us what brand of coach , year , make of a/c etc

You may even find a picture on line we could look at

What you described does not sound like most coaches or at least like
anything I have seen .

choppermtn

pigeon forge , tn

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Posted: 08/14/19 11:41am Link  |  Quote  |  Print  |  Notify Moderator

I have a 38ft. Newmar Mountain Air , ford chassis , v10.Dometic a/c now .

I think I saw the 4 bolts that you are referring to I just don't know if when they are removed anything will "fall" between the roof and ceiling making It near impossible to install the new unit . Are there any "tricks" anyone could share ?

Chris Bryant

Arden, North Carolina

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Posted: 08/14/19 11:56am Link  |  Quote  |  Print  |  Notify Moderator

Yours is going to take a very specific replacement, depending on what you have. It is lag screwed in, instead of bolts. Here is a picture from one of the training power points showing a Newmar install.

[image]


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dougrainer

Carrolton, Texas

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Posted: 08/14/19 12:06pm Link  |  Quote  |  Print  |  Notify Moderator

Chris Bryant wrote:

Yours is going to take a very specific replacement, depending on what you have. It is lag screwed in, instead of bolts. Here is a picture from one of the training power points showing a Newmar install.

[image]


NOTICE that gasket that goes between the 2 roof holes. THAT gasket is critical for correct operation. It separates the Intake hot air from the cold exhaust air and if not installed or installed incorrectly, you will not get adequate cold air output. The Lag bolts are installed into a wood/aluminum backer plate. Just make sure you measure and drill the 4 holes in the New AC mount pan, exactly where the original ones were, Do NOT over tighten the lag bolts or you can strip them out of the Aluminum plate. Doug

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