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[Goat Herder]

My woodmaster 4400 fan quit, heard it moaning When I stepped out of the house, went and looked at it it and made a screech.....game over, drove a couple hours to Nashville, Il to Kessler Hardware, great people, bought a new fan, back on...all good.

Question: I wanted to get the water circulating again and heat back on, also make sure all is good.  The old blower had a thin gasket, no gasket with the new one, and I did not use any gasket material. 
Going to watch for runaway temps next few hours.

Do I need a gasket?   Or, gasket material between blower and the door?

[aarmga]

I personally would recommend a gasket.  Metal can expand and contract enough to eventually have a gap large enough to have an air leak there.  It is good insurance anyway.  Mine has a tiny flat rope seal gasket like our doors use.  I'm sure you could even use a small bead of high temp rtv to keep the air out as well.  If you decide to go that route I'll send you a picture of what I use for rtv.  U can pick it up at a large hardware/outdoor store.