I just installed a programmable thermostat for an electric Coleman Evcon furnace. Now when the furnace comes on the blower also comes on. Sometimes the blower goes off a minute or so before the furnace stops. It never did this before- in fact I didn't even know there was a blower. Do I need to leave the blower setting on Auto? Does it need to run with the furnace? The original thermostat was a very basic builder's cheap.

Usually most leave the blower on auto. This way it only blows when needed.

On a coleman evon where is the drain pipe