cln wrote:
My 18 year old house has a combination Wood and Electric pushed air
furnace.

I'll start a fire and eventually the fan starts... typical and
expected.

I question what follows. The fan will run for 1 to 2 minutes. In the
beginning the ducts barely have time to warm up so the air isn't hot
when it comes out.
After a few minutes, the fire is roaring and produces plenty of heat.
I even added a tiny 4" fan on the flue pipe to propagate the heat in
my shop.

So if this 4" fan is enough to make a small difference in my shop,
why isn't the furnace running longer at times?

I had the furnace inspected last winter/spring time. A fuse had
popped. He checked it over and said there was nothing wrong with it.

Is there something I can do? I asked if the fan could be upgraded to
a two speed fan. I figured that it could run on a lower temperature.


Any advice appreciated.

Does heat come out the heat registers even when the fan is not running? Maybe
this is a convection system, and the fan is only there to "prime" the system
with warm air to start the convection. IF so, it should use very little
electricity, and continue to work when the power is out.

Otherwise, I'd check the thermo-switch that turns the fan on when it warms up
and replace or adjust it.