On my 60 trdwnd ,the furnace lights ,and heats fine ,it needs to get hot
as well for the blower to come on ,it does not just come on right away.
Also ,the design as i can tell is that the blower IS for circulating the hot
air .It has a manual vent you move with a pull lever to close the air to the lower front ,and direct it back to the bath ,where it travels thru a tunnel
formed from aluminum (original to the trailer) and exits at the floor/wall in the
bath thru an opening in the wall (round 2" hole with mesh screen ).Now ,
the furnace has a 12volt blower behind the furnace ,and a thermocouple switch up the furnace housing for the heated air to warm it to start the blower motor fan assembly,there is a transformer (original) that converts 110 to 12v
when on shore power is on (wall switch by the furnace ,shore or 12v
anyway ,this is how my furnace works .This is the original unit in my coach
and it looks like the style most of these early trailers used ,looks like a 60s
home wall furnace ,the kind that usually was in the hall way of many homes.
Im sure that the newer styles of today ,and even 20 years ago were different
in there design ,but not in my case ,and most likely schwrtzmnn 's furnace
works as mine does ,it sounds like it .Id venture to say that the thermoswitch
that turns on the blower is cooling off too quickly ,shuting the blower off
until it gets hot enough to turn the blower on .Mine isn't exactly working
perfectly either in this regard ,it will run the blower for a long time ,then sometimes it takes a long while for it to switch on .
Scott of scottanlily