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Old 08-18-2022, 05:10 PM   #1
SweetGinger
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AC not blowing in bath/bedroom 2017 Keystone Cougar

My ac isn't reaching my bedroom and bathroom. The ac is running perfectly in the main room, but the cool air isn't going down the separate duct to the front of the fifth wheel.

I checked for blockages, and everything is clear. The filters are clean, too.

The photos show the ac with the cover off and the ducts that feed the vents throughout the rv.

I just bought this unit in March and the dealer said the roof was perfect and had never been repaired. My only thought is there's a spot where the duct has disconnected, but I can't figure out how to see that without tearing into my ceiling (not happening).

Do I have any options besides calling a mobile rv repair service?
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Old 08-18-2022, 06:51 PM   #2
wrvond
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I would temporarily block off the duct for the living room side and then check the flow to the bath/bed rooms. If you don't get any appreciable flow you can be sure there is a disconnect in the duct and all your air is blowing into the attic. If there is a break, and it is before the bathroom then you'll get no air to either room. If you get airflow to the bathroom but not the bedroom then the break (or disconnect) would be in the bedroom.
If that is the case it might be easier to make an open ended box of coroplast or high density foam that will fit inside the ductwork and push it down the line until it covers the break - if you're lucky.
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Old 08-19-2022, 03:44 AM   #3
GMH
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This is how i made a little “scoop” from some thin aluminum to grab a little more air and send it down the long duct to the bedroom. Just fasten it to the wooden piece below the duct. Any thin metal will work as long as it is thick enough to hold its shape and not vibrate. It made a HUGE difference.
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Old 08-19-2022, 05:54 AM   #4
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Also, if you can take the diffuser off in the bedroom, you may be able to use a small mirror to look back down the duct for obstructions or damage. Make sure the duct is capped or blocked after the last diffuser.
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Old 08-19-2022, 07:02 AM   #5
chuckster57
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A cheap inspection camera would work like a charm to look at the ducts. You may have to look from the end of the run by removing a vent. While inspecting, you should take the time to block off the ducts just past the last vent. Lots of air is pumped into the front and rear caps if the ducts are sealed at the ends. Another loss is the vents themselves, make sure they are sealed.
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Old 08-19-2022, 08:34 AM   #6
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I followed this guys advise and it made a world of difference in our unit. He explains your unit as well. Doesn't cost much at all to do and a few beers later you'll be happy you went through this task.

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