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Old 08-16-2008, 08:02 PM   #1
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1985 34.5' Airstream 345
Jarrettown , Pennsylvania
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345 roof fan dilemma

The rear roof fan in our 85 345 stopped working, so we checked power to the front one first (yes), noticing that it had been rewired by a PO to run only on High (which explained why we couldn't get any Low). The rear had worked before on both High and Low, but has no power at the thermostat at all now. Is there a relay or fuse in between to check? The manual doesn't indicate one, but I suppose it is possible . . .
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Old 08-16-2008, 08:44 PM   #2
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Is this a Fantastic fan, or the fan in your rooftop air conditioner?
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Old 08-16-2008, 09:28 PM   #3
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The (not at the moment) Fantastic fan.
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Old 08-16-2008, 10:04 PM   #4
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follow the power connection near the fan, you might find an inline fuse there. also check for power at the switch or a loose wire.
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Old 08-16-2008, 10:05 PM   #5
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On my rig the front and rear fans are on different 12V circuits. Have you checked the fuse in your 12V distribution center (near the converter, under the pantry on our 84 310)

Call Fantastic Fan on Monday if you dont' get it fixed before then. They will talk you through diagnosis and send you any needed parts. In my experience, they don't charge for the parts. If you're in a hurry, let them know and they should expedite shipment.
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Old 08-17-2008, 06:59 AM   #6
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If there is no power at all going in to the fan, your problem is not with the fan itself. You probably have a bad connection or blown fuse, does anything else not work in the 12v system? I had some problems with a trailer, and it turned out there was corrosion around the metal on the fuse. I wiggled the fuse, and everything worked again. It could be that easy. The rewiring of the front fan is relatively easy, you just need to move the feed connector from the contact it's at, to one of the other ones.
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Old 08-17-2008, 12:08 PM   #7
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There is a 4 amp fuse located next to the fan speed switch on the fan housing...could that be the culprit?
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Old 08-17-2008, 05:21 PM   #8
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1985 34.5' Airstream 345
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Thanks all - We'll be checking out the converter idea. Since we have no power at the thermostat, it must be between there and the power source. We wonder if there is a mystery fuse installed by a PO . . . or maybe just a bad connection somewhere. (Maybe a Tumbleweed Connection . . .)
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