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Old 11-17-2013, 09:16 AM   #1
wingrider07's Avatar
Join Date: Apr 2013
Posts: 62
Fantastic Fan Control Moisture Problem

In my '06 Dutch Star I had to replace the Fantastic Fan control unit mounted on the outside wall of the bathroom earlier this year. The folks at Fantastic Fan sent me a replacement control board at no charge....great product and customer support.

The customer service tech I spoke with said there are moisture problems from condensation forming on the printed circuit board in units that have the control mounted on an outside wall in the bathroom. Here in NC this past Wednesday night temperature dropped to 30 degrees. By Saturday mid-afternoon the temperature was 76 degrees. When I tried to turn on the fan in the bathroom for ventilation it would not work.

Two problems: the vent lid was stuck, (would not open) and the control on/off switch was not working properly. When I removed the switch from its housing the back of the switch was dripping wet with moisture, however, the insulation inside the wall was perfectly dry. I dried the back of the circuit board and forced the lid open and the fan worked as it was designed to.

Has anyone else had this condensation moisture problem with control units mounted on an outside wall and if so what did you do to eliminate it?

2006 Dutch Star 4023, ISL 400 Cummins
2011 Ford Edge, Blue OX, RoadMaster BrakeMaster
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Old 11-17-2013, 01:18 PM   #2
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Never had that problem on either of my two fans both on outside walls.
Is there cold air coming out of hole and hitting your warm control causing condensation.
You maybe should try some sealant in hole cavity to stop the condensation.
As to sticking use some 303 and wipe on rubber seal so cover will not stick and its also good for your slide rubber seals.
In my signature below you will see three links with more info fo your Newmar.
Safe travels.

98KSCA, 99MACA, 03 KSCA-3740- 8.1 Chev-- ALLISON Trans, now in good hands
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Old 11-18-2013, 07:14 AM   #3
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Join Date: Apr 2013
Posts: 62
Thanks 007. I was thinking of using an electric grease on the back to the printed circuit board to keep out the moisture. Do you think that might work?

On your 303 suggestion; I read somewhere on this site that Newmar recommended baby power for the slide seals; your thoughts? How do you service the top of the inside seals? My arms are not that long!

The links were GREAT! Thanks!
2006 Dutch Star 4023, ISL 400 Cummins
2011 Ford Edge, Blue OX, RoadMaster BrakeMaster
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fan, moisture

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