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Old 09-08-2015, 01:18 PM   #1
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Range Hood Fan Problem

The range hood fan on my 2012 5.0 Classic does not blow air out anymore, it sucks it in. The flap on the outside of the trailer is pulled towards the trailer when the fan is on rather than being pushed out. I've done nothing to the trailer since the last time I used it and the fan was working fine then. I tried reversing the fan itself in the hood but that made matters worse.

Can anyone shed some light on this before I call ETI?

Thanks

Barry
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Old 09-08-2015, 01:38 PM   #2
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When you kneel down in front of the counter and look up at the fan it should be rotating counter-clockwise. Is yours?

My conclusion regarding these fans are that I'm happy to have the range hood but I don't think the fan itself is all the powerful. When we use ours I hold the flap open with a clothes pin which seems to make it more effective and the clothes pin, being visible, reminds me to lock the flap again.

Ron
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Old 09-08-2015, 01:46 PM   #3
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I've read of folks swapping out the stock fan with 4" computer fans, usually 2 of them, mainly for noise issues.
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Old 09-08-2015, 01:51 PM   #4
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Hi Ron.

The fan is rotating clockwise when looking up at it, in the past the flap used to open when the fan was on. I too leave the flap open with a clothes peg, especially when it is raining, to allow some fresh air in all the time. This is how I noticed that it was not working as I went out to peg it when the fan was on and had to pull the flap up to peg it. As soon as I let go of the flap it was sucked shut and not flapping loosely until the fan was shut off.

Any ideas?

Thanks
Barry
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Old 09-08-2015, 01:54 PM   #5
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Quote:
Originally Posted by padlin View Post
I've read of folks swapping out the stock fan with 4" computer fans, usually 2 of them, mainly for noise issues.
Actually this fan is quite quiet compared to my old 2005 17B range hood. I'm fine with the noise and just want it to suck out when on!

Barry
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Old 09-08-2015, 02:01 PM   #6
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Actually this fan is quite quiet compared to my old 2005 17B range hood. I'm fine with the noise and just want it to suck out when on!

Barry
Hi: barry... Maybe "The Bird of Paradise" built a nest above the filter mesh?
Some days I actually have to work too, but I have been known to do things backward also!!! Alf
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Old 09-08-2015, 02:08 PM   #7
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Some 12 volt fans can be reversed by reversing the polarity but I can't imagine that could be your situation. Still, if you have a meter and can check for sure that'd eliminate one possibility. You could check a 12 volt outlet. If the center is positive it would confirm everything's OK on the trailer side.

Definitely a puzzle.

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Old 09-08-2015, 02:40 PM   #8
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Quote:
Originally Posted by Ron in BC View Post
Some 12 volt fans can be reversed by reversing the polarity but I can't imagine that could be your situation. Still, if you have a meter and can check for sure that'd eliminate one possibility. You could check a 12 volt outlet. If the center is positive it would confirm everything's OK on the trailer side.

Definitely a puzzle.

Ron

The center of the 12v plug to a ground wire gives me 12.47 volts ...... not sure if that is what you are asking me to do.

Barry
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Old 09-08-2015, 03:26 PM   #9
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If you are using a meter, as opposed to one of those stick in cigarette outlet volt displays, it will indicate a " - " to the left of the display if the polarity is reversed.

Don't know how that could happen in your situation. It's usually caused when someone reverses the leads to the battery. Still worth checking though because it should isolate the problem to only the fan motor.

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Old 09-08-2015, 03:38 PM   #10
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Quote:
Originally Posted by Ron in BC View Post
If you are using a meter, as opposed to one of those stick in cigarette outlet volt displays, it will indicate a " - " to the left of the display if the polarity is reversed.

Don't know how that could happen in your situation. It's usually caused when someone reverses the leads to the battery. Still worth checking though because it should isolate the problem to only the fan motor.

Ron
I'm not getting the "-" when I use the meter in the cigarette outlet but if I intentionally put the negative lead into the center then I do get it so the polarity is correct. There must be something wrong with the fan motor or maybe it is wired wrong.

Have to head into Chilliwack tomorrow to visit my mother in law so this will be a good excuse to slip away and drop into Escape and pick their brains.

Thanks for your help Ron.

Barry
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Old 09-08-2015, 03:57 PM   #11
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At least you're really close to Escape Can't see that it would be anything in the wiring unless you'd done some electrical work. Also can't see how anything could have changed in the switch that would affect direction.

Only thing I'm wondering about is if the magnets in the fan motor could somehow have been demagitized. Hope ETI has some answers.

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Old 09-08-2015, 03:57 PM   #12
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Quote:
Originally Posted by barry View Post
I'm not getting the "-" when I use the meter in the cigarette outlet but if I intentionally put the negative lead into the center then I do get it so the polarity is correct. There must be something wrong with the fan motor or maybe it is wired wrong.

Have to head into Chilliwack tomorrow to visit my mother in law so this will be a good excuse to slip away and drop into Escape and pick their brains.

Thanks for your help Ron.

Barry
Hi: Barry... Could be in the switch. I had the one in the 5.0's bathroom vent fan fail. Cost about 3 bucks to replace with a metal push on/push off instead of the plastic one. Reace'll figure it out. Alf
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Old 09-08-2015, 04:05 PM   #13
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This may not be your problem but I noticed very poor performance from our range hood on our new 19', the outside flap would open just a bit when on. I removed the mesh filter inside the hood and WOW does it work now. The mesh filter on ours also contained a paper core filter that is probably activated charcoal, the result is too much restriction.
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Old 09-08-2015, 04:48 PM   #14
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Exhaust fan

The only other thing I thought of in addition to the filter was that perhaps you also had the max fan on at the same time. On high, it might create enough negative pressure if the windows and door are closed to pull the vent shut or at least negate the positive exhaust of the range hood fan. Just a shot in the dark. I've done a lot of that.
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Old 09-08-2015, 05:06 PM   #15
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Hi: Iowa Dave... Maybe It's just not his biggest fan!!! I had a fan once but she was exhausted. Alf
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Old 09-08-2015, 05:12 PM   #16
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Thanks for the clothes pin trick. I seem to have a sticky exhaust flap on mine.
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Old 09-08-2015, 05:19 PM   #17
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We undid the tabs on the outside range vent piece to use it the first time and that was the end of it. Seems if you do not put the tabs back in place again, it disappears.
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Old 09-08-2015, 05:40 PM   #18
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Hi: Barry... Could be in the switch. I had the one in the 5.0's bathroom vent fan fail.
OK, I'll probably end up with egg on face, wouldn't be the first time , but normally when a switch fails one of two things happen. Nothing or an arc and a blown fuse. I can't see how the switch could reverse the rotation. Normally what reverses rotation is reversing polarity.

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Old 09-08-2015, 08:33 PM   #19
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Quote:
Originally Posted by Ian G View Post
This may not be your problem but I noticed very poor performance from our range hood on our new 19', the outside flap would open just a bit when on. I removed the mesh filter inside the hood and WOW does it work now. The mesh filter on ours also contained a paper core filter that is probably activated charcoal, the result is too much restriction.
I tried it with out the filter in place and it's no different, thanks anyway. What's weird is that it was working fine but now isn't. According to what Ron said it seems that the fan is rotating the wrong way, clockwise instead of counterclockwise.

Barry
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Old 09-08-2015, 08:45 PM   #20
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Hi: Barry... Could be in the switch. I had the one in the 5.0's bathroom vent fan fail. Cost about 3 bucks to replace with a metal push on/push off instead of the plastic one. Reace'll figure it out. Alf
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I'm sure Reace will figure it out Alf, it's just I feel bad dropping in now they are so busy. Before he'd stand and chat for 20 mins while now he takes 3 phone calls in the 5 mins. you are talking to him!

Barry
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