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RV-Dreams.com Home -> RV-Dreams Community Forum -> RV Maintenance and Technical Tips -> One Air Conditioning Unit bad air flow forward
Post Info TOPIC: One Air Conditioning Unit bad air flow forward
Missy


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One Air Conditioning Unit bad air flow forward
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We have been living in our 1198 Jayco 32' Class C for nearly a year and all has gone well.  BUT, we have one nagging issue that is going to get bigger as the temps warm up.  The air conditioner works and blows very cold air, but only down through the rear vents and not so much out to the front vents.  We took of the shroud and have look for an obstruction, but can't really get to the forward and back air ducts.  Can anyone help with what we might need to do.  Last year we got by with setting a fan in the rear to push the cold forward.  It seems we need a better solution as to not over task the unit.  Any ideas would be greatly appreciated!!!!!!



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Blessings, Missy

1998 Jayco 3240FL Designer Class C

 
The Bear II


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I'm guessing you have a ducted A/C setup with a roof top mounted A/C unit. There are long handled brushes you can get at the home stores used to push through ducts to clean out dust. You'll need to find one for clothes dryer ducts. This can be pushed in the duct from the front to the back towards the A/C unit. This will help you to locate and get rid of any obstructions.

I'm sure you've made sure the filter is clean.

We close down the rear ducts to direct more air to the front ducts. We don't close them all of the way but adjust them so we are getting equal air flow at all ducts. We still have to use fans when the outside temp approaches 100 degrees to keep the cold air circulating in to a couple of hot areas.

If you have a 13,500 BTU unit switching to a 15,000 BTU will make quite a difference in staying cooler.

Here's how we beat the heat... The A/C stays on 24/7 if the temp is going to get above 80 degrees outside. All of our windows have outside awnings which are deployed along with the patio awning for maximum shade. All blinds are turned to block the sunlight but allow us to still see out. The door stays shut as much as possible. By keeping the A/C on everything in the RV gets cold, furniture, walls, counters this helps the A/C unit to maintain a cold temp inside.

Another trick I found with our A/C is to not set the thermostat all the way down... instead of 50 I set it at 55 or 60. At 50 it seems not as cold as at 55. Maybe a quirk in the control or in my head.

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bjoyce


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biggrin In 816 years I can see how a duct could get clogged.

(2014 minus 1198 is 816.  I am sure you meant 1998.)

Jokes aside, I agree it sounds like a blocked duct.  To get to the ducts you might have to remove the A/C unit from the roof, but you should be able to snake something flexible through one of the outlets.  You might need something longer and stiffer than a dryer vent brush.  If you have a plumbing snake, you could try that to clear whatever is blocking the duct.  Do it with the A/C fan on high, that way any debris will flow to the outlet and you will feel the air moving.



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Bill Joyce,
40' 2004 Dutch Star DP towing an AWD 2020 Ford Escape Hybrid
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lindy


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If you can take the vents off use a small inspection mirror and flashlight look down the vent tubes to see what is obstructing them.

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