I have a Pressure Heat brand wood fireplace insert. It has a remote fan that I'm assuming blows air around the firebox and out the vent above it if it worked properly. It's my understanding that this company went under years ago so I can't find any info on this insert anywhere. I replaced the fan outside last year because the old one was seized up. If I turn it on when there is no fire going, it doesn't blow air through the vent, so I've been hesitant to use it at all for fear something isn't right. I can reach through the outside vent and feel the air inlet and it feels blocked. Is there something in these inserts that only allows that vent to open when it reached a certain temp or something like that, or should it be open and free flowing all the time? Seems like that would be drafty when not in use. Just trying to figure out how this thing is supposed to work and running in to all dead ends. Anyways I have it all torn apart and don't want to put it back together until I figure out if that inlet should be blocked off like that when not in use or not. TIA for any and allhelp!