Outside stove vent flap

It should be held closed by a magnet. When fan is turned on, the air forces the vent open.

My Jayco has 2 snap like things that hold it closed. Had to use a step ladder to reach it.. I just leave it unsnaped now and when fan turned on , it opens.

My TT has snaps also.

My previous camper had a turn knob that had to be turned from the outside of the vent.

My TT has two plastic tabs that you have to turn so that the flapper will open when the fan is running. I don't know if rain would get in when driving if you did not clip it down again.

Seems they're all a bit different. The flap on mine "snaps" closed, I have to unsnap it before the fan will evacuate to the outside. The force of the air will not do it. I snap it closed after a trip to keep out bugs.

Livies Dad wrote:
My Jayco has 2 snap like things that hold it closed. Had to use a step ladder to reach it.. I just leave it unsnaped now and when fan turned on , it opens.

Same on my Jayco

After replacing mine after knobs broke, now have close pin... works great

Found a guy that makes them out of stainless steel for the mega spending airstream folks. I'll keep using close pin and keep my $250.00

Thanks everyone for your advice and hints! We finally got that flap opened but it took some prying to do so. Had to get something really thin to slide into the bottom of the flap and pry it open. There was no way to pull on the two small knobs. Anyway it is now open and will remain so. On the highway we will duct tape it to keep it from flapping. Thanks again everyone.

Mine has this, with the little tabs in the corners, I've actually forgot to lock the tabs, and lost the flapper going down the road.
http://images.dyersonline.com/catalog/product/cache/1/image/a1eed0813d52712d6e948f99c3696e26/h/e/heng_s_off_white_range_exhaust_vent-30416-1.jpg