Originally Posted by RandD Hopey
However when the dryer is running there doesn’t seem to be anything come out of it and the machine gets really warm. The small flapper in the vent does it need to be opened by hand or does the air pressure do it as it is hard to open?
If it's hard to open by hand air pressure from the dryer is NOT going to move that flap. You need to see what's going on with that flap. Replace or lube. Check to be sure dryer hose is connected properly and there are no obstructions down stream. Maybe run a snake down that exhaust tube to be sure you have a clean path.
You could just manually open that flap and fix it so it's permanently open. Just make sure where the hot air exits from the MH there a good screen there that can be periodically cleaned and it will also keep critters out.
My 2 cents...