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06-10-2015, 12:14 PM
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#1
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Senior Member
Join Date: Aug 2013
Location: Hamilton, MI
Posts: 429
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Bathroom fan blowing in, not out
My sister and bil bought a used Jayco 29L tt last fall. Took it out for its first trip late last fall. Everything was good, except the bath fan. Like most RV fans ive seen, they suck the air out, this one blows it in. Any ideas why? Its not your normal vent bath fan, but maybe more like a Fantastic fan (i think it was another brand)? Tried messing with it (i think it has a switch on it) but it still only blows in no matter what I do. STUMPED
__________________
'97 Jayco Eagle 314BHS
'03 Tahoe LT 5.3L
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06-10-2015, 12:18 PM
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#2
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Senior Member
Join Date: Oct 2014
Location: Bethlehem
Posts: 277
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Quote:
Originally Posted by Plowtoy
My sister and bil bought a used Jayco 29L tt last fall. Took it out for its first trip late last fall. Everything was good, except the bath fan. Like most RV fans ive seen, they suck the air out, this one blows it in. Any ideas why? Its not your normal vent bath fan, but maybe more like a Fantastic fan (i think it was another brand)? Tried messing with it (i think it has a switch on it) but it still only blows in no matter what I do. STUMPED
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Have you checked the leads to see if you can reverse them?
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06-10-2015, 12:43 PM
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#3
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Senior Member
Join Date: Dec 2014
Location: Lancaster CA
Posts: 125
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If a search of the fan does not reveal a switch to reverse the direction of flow you will have to reverse the power leads. These fans are DC powered and reversing the power wires will reverse the fan blade direction. 
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2015 Ram Laramie Crew Cab 4x4 turbo diesel
2015 White Hawk 27DSRL
No, I did not win the lottery.
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06-10-2015, 12:44 PM
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#4
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Senior Member
Join Date: Aug 2014
Location: Morris
Posts: 250
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Quote:
Originally Posted by BJR
Have you checked the leads to see if you can reverse them?
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Good advice, with DC motors it should be just a matter of reversing the leads.
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Retired and loving it.
Got a new 2014 Grayhawk 31DS
Hoping to get away from the IL winters
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06-10-2015, 12:46 PM
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#5
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Senior Member
Join Date: Mar 2015
Location: Abingdon
Posts: 6,177
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...or flip the motor over!
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2013 Jayco Eagle 328 RLTS
2021 Keystone Montana 3121RL
2013 F350 6.7L 4x4 CCLB
W/Air Lift air bags (front & rear)
Equal-I-Zer™ WDH & B&W Companion
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06-10-2015, 12:48 PM
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#6
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Senior Member
Join Date: Dec 2014
Location: FL
Posts: 11,281
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There is a fan called 'Hengs RV Vortex' that looks a bit like a Fantastic Fan but isn't reversible. It is supposed to be an easy replacement for the factory fans.
It is likely the previous owner wanted air blowing inward so sewer smells would not be sucked into the trailer if the toilet was flushed with the fan on.
If all that is correct, I believe all you need to do is reverse the leads and the fan will blow outward.
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Sherm & Terry w/rescue Eydie (min Schnauzer) & Charley (std Poodle)
SOLD:2015 Jay Flight 27RLS, GY Endurance (E), Days: 102 '15, 90 '16, 80 '17, 161 '18, 365+ '20
SOLD: 2006 Ford F350 PSD, 4WD, CC, LB, SRW, Camper pkg., 375,000mi
Full timing: Some will think you're crazy, some will be envious, just enjoy the freedom!
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06-10-2015, 02:44 PM
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#7
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Senior Member
Join Date: Aug 2013
Location: Hamilton, MI
Posts: 429
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Ill see them tonight, I will ask my bil if he can switch the leads. About a week ago, he said he reversed the leads at the battery and it still blew inward. Im not sure how it didnt blow the fuses. He may have had the shore power plugged in at the same time and im guessing it wouldnt have made a differance. Ive never had one of those fans apart. If I remember correctly, it tells what color wire is hot and cold on the fan and he said it was correct. But your right, its 12v, shouldnt make a differance what way its hooked up.
__________________
'97 Jayco Eagle 314BHS
'03 Tahoe LT 5.3L
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06-10-2015, 04:22 PM
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#8
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Senior Member
Join Date: May 2013
Location: Dale Hollow Lake Tn/Ky
Posts: 2,525
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STOP IMMEDIATELY and get someone involved who can figure this out. Reversing the battery leads could have damaged the fridge and other sensitive 12v items. I would hope that he didn't actually switch the +/- leads at the battery.
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06-10-2015, 04:41 PM
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#9
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Senior Member
Join Date: Dec 2014
Location: FL
Posts: 11,281
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Quote:
Originally Posted by Bassdogs
STOP IMMEDIATELY and get someone involved who can figure this out. Reversing the battery leads could have damaged the fridge and other sensitive 12v items. I would hope that he didn't actually switch the +/- leads at the battery.
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WHAT HE SAID! If you and your BIL aren't somewhat familiar with 12v TT systems.
DO NOT REVERSE THE LEADS AT THE BATTERY!
Temporarily reversing the leads at THE FAN should do no harm, but should reverse the fan direction!
__________________
Sherm & Terry w/rescue Eydie (min Schnauzer) & Charley (std Poodle)
SOLD:2015 Jay Flight 27RLS, GY Endurance (E), Days: 102 '15, 90 '16, 80 '17, 161 '18, 365+ '20
SOLD: 2006 Ford F350 PSD, 4WD, CC, LB, SRW, Camper pkg., 375,000mi
Full timing: Some will think you're crazy, some will be envious, just enjoy the freedom!
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06-11-2015, 07:45 AM
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#10
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Senior Member
Join Date: Aug 2013
Location: Hamilton, MI
Posts: 429
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Quote:
Originally Posted by Bassdogs
STOP IMMEDIATELY and get someone involved who can figure this out. Reversing the battery leads could have damaged the fridge and other sensitive 12v items. I would hope that he didn't actually switch the +/- leads at the battery.
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Thats what he told me! I am an ase mechanic and understand 12v, but what he does when im not there is up to him. He is lucky he didn't damage anything and honestly im surprized that he didnt blow up the battery or at minimum blow the fuses at the connection. We are leaving on a week long vacation with them soon and I will bring my electrical tool box and switch the wires at the fan while there. Acording to him, the fan is wired correctly per what the diagram says, so maybe its supposed to blow in, but he wants it to blow out so I guess this is the best way to do it
__________________
'97 Jayco Eagle 314BHS
'03 Tahoe LT 5.3L
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06-11-2015, 11:52 AM
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#11
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Senior Member
Join Date: Apr 2014
Location: Calgary
Posts: 885
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My stove top vent fan was blowing backwards when we got the trailer. Factory installed the wires backwards. Switched them around and works fine now and sucks all the cooking smells and fumes out of the trailer now.
Bathroom fan should be an easy fix.
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2014 Jayco Swift 281BHS, 300W Solar!
2015 F250 XLT 4x4 Crew Cab, Short box, 6.2 gas
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