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Old 02-13-2008, 07:23 PM   #1
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2008 23' International CCD
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Fridge fan very noisy

I am new to airstream, just recently retired, so new to trailering. We have a 23' International. I read the thread regarding the fridge fan. We do not have a fan switch. Sometimes it comes on at night and it wakes me up. Has anyone else encountered this problem? Thanks so much.
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Old 02-13-2008, 07:40 PM   #2
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Welcome to the Forums!

Nice rig you've got there......There are at least a couple of solutions to your fan noise problem.

First, you should understand just why that fan is there and what it's purpose is. The refrigerant used in an RV ridge is a mix of liquid ammonia, hydrogen gas, water and sodium chromate (a corrosion inhibitor). When the refrigerant mix is heated, it rises up the boiler tube and goes into the condenser, where the ammonia returns to a liquid form and it's reaction with the hydrogen begins the cooling process and subsequent heat transfer from within the fridge cabinet.

If the condenser is too hot (from proper lack of air flow across it), the process is inhibited and the fridge will not cool properly. Airstream places the fan in the rear baffle section of the fridge to speed this air fow and enhance the efficiency of the condenser and with it....the overall cooling capacity of the unit. Unfortunately, this is a band-aid that has no true effect on the ventilation process! There are very specific requirements for the design of the rear compartment of the fridge, and from what I've seen, these are not exactly to spec...based on what Dometic requires.

A better design would be to have a fan blowing UP from the bottom of the compartment and then another blowing OUT from the top. A solid alternative is to add a Snyder's Refrigeration kit to your unit which directs air flow directly across the condenser, but you could also just add....or have added a simple switch that will turn the fan on/off.

You really don't need a fan boost unless you are experiencing warm fridge temps (above 42*F) or you plan on camping in very hot climates.

Hope this clears things up a bit!
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Old 02-13-2008, 09:23 PM   #3
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Roselie---My 22 ft CCD made similar noises. I solved it with a Snyder fan kit, LEW, installed it last Oct at the Balloon Festival. Works great. The new fan is an order of magnitude more quiet, runs less to get the same level of cold and uses less propane. I'd do it again in a heartbeat. The fan kit came from Pennsalvania, or LEW can order one for you.
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Old 02-14-2008, 11:16 AM   #4
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Thank you

Thanks so much for your quick response to my fridge fan question. They were very helpful. I will look into installing the Snyder fan kit.
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Old 03-13-2008, 04:16 PM   #5
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I just went to the local computer store and picked up a 120mm computer fan (quiestest one I could find). It's a Scythe something-or-other. The quieter ones are lower CFM but I think it will be better than the one that just gave up and blew the fuse in my trailer! I will be installing it in the next week or so and will try and get some photos.
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Old 03-13-2008, 06:26 PM   #6
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Hi Roselie
Do a search for the thread titled "Refrig fan noise fixed...really" I have a 2006 22' CCD and I changed the fan within a couple of months of getting the trailer. I think it is a good fix. If nothing else it has some good info. Enjoy your trailer.
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