Noisy fan on range hood

AnEv942 wrote:


We also use the fantastic to vent,that works really well but on cold mornings also takes all the heat. .

also, I don't like all of the grease/etc. going up thru that fan. prefer getting it out as quickly as possible thru the range hood.
bumpy

The tap tapping during the night, though can be the outer door, on ours its the inner flap, thats part of the vent housing, that is the source of noise. Even outer door latched it sometimes flaps.

wnjj s mod is very clever but it wont work (as easily) on all vents. I was going to copy but the opening and duct on our vent housing considerably smaller than outside vent. So the latches would need to be really long.

The sheathed cable also works.

Mine has gone thru a few different motors, Muffin fans work great, however the one I originally picked up, on high, was only 80cfm. While Margaret could snooze while I made coffee-the camper filled with steam. I never revisited but a higher cfm muffin/cpu fan still be nice also because of low power use.

I subsequently put in a salvaged can motor from a printer. Direct fit, quite, but again just didn't move enough air. Currently Im running the stock motor but added a resister and double throw switch to make it 2 speed similar to factory 2 speed. Sound not bad on low but on high, to actually vent, its the same old too loud motor.

We also use the fantastic to vent,that works really well but on cold mornings also takes all the heat.

IF I ever get a wild hair it would be to gut the vent housing and get rid of the horizontal fan- reduct so it draws horizontally heat/air thats being captured by hood instead of same level as bottom of hood. Thats why it needs such high CFM, just to overcome poor design of the box. But I'm really surprised someone doesn't make a retrofit kit using pancake or muffin fan.

I thought this post had an excellent idea to fix the flap, flap, flap of the vent. 2 inexpensive springs and latches!

http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/24397265.cfm

fpoole wrote:
and the vent flapping in winds... 3am of course... flap, flap, flap..... since they are related? if not, delete this post. thanks.

Yep, mine too - the duct tape has peeled off after 2 years - need to stick a fresh bit on.

Steve.

I agree that a flapping vent likely has a broken hinge. Mine broke while latched.

Here's what I did to latch the vent from the inside (2nd half of the post):

http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/24397265.cfm

And here's what I did to fix the broken hinge (my brother's idea):

http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/28506892/gotomsg/28508392.cfm#28508392

Maybe gregchambers will eventually return and fix his link.

I just did this project, first, the original fan sounded horrible and loud. I took it apart and I could not see that the blades were rubbing or hitting any thing, no marks on the blades at all, just noisy. Shot it with WD it did nothing to quiet the fan. I took an old computer fan (muffin fan) cut the little blue temp control off. It runs pretty fast and is much much quieter than the old one, (hardly know its running) I made some brackets and covered any open spaces with aluminum tape and hooked up the wires. Turn the switch on the fan and it does fine. I would say it moves about the equal amount of air, judging by how much the door flap opens.
The vent flap was flapping because the little plastic keepers were broken off, I replaced the exterior of the vent with a new one, $12.99 from our local RV store, easy job, now its brand new white and the flap can be secured. The last thing will be to replace the 912 light bulb with a led one and I'll call it good.

racedrvr wrote:


My 5th wheel vent flap has a locking tab so it doesn't flap when going down the road. I just lock it down on windy days when the range is not in use. I probably will install something on the TC to do the same.

Heheh, well Lordy-lordy, so do I....
I just checked it and while I've used the fan several times, never knew the flap was locked down, sigh, a learning curve to be sure...

I have the locking tabs and it was locked down.. so my flapping must be something else... although it's thin plastic flap and the top part was a little loose, might have been that... duct tape comes to mind..


Never mind, thanks all, continue on with the Fan noise... as it is loud...

Go to the search box @ top, type in (range hood fan replacement)

I insulated and sealed mine up. Never used it anyhow. Plus the Fantastic Fan is just overhead so we use that instead.