I have a Coleman furnace that decided to start having the alarm go off on me...

My brother and I were looking at it, and according to the 'single blink' it has something to do with the attic fan. I have no idea what to do... and I really don't have the money to have someone come in and fix it. Anyone have any ideas??

This is what I found when I researched it...

Item B has both a green and red light but this is not a diagnostic code for the furnace. This box is labeled blend-air and it's function is to bring in fresh air. If there's a problem with the blend-air unit, a red light will flash and you may hear a beep. Generally if you do hear this unit beeping or see the red light flashing, it's not a life-threatening warning and you will be OK to run your furnace until you can get it repaired. The unit should have a switch to shut off the beeper so it doesn't drive you nuts.
If your furnace is still under warranty, you'll want to get the blend-air (also called Fresh Air Fan) unit fixed as soon as possible or your warranty could be voided.

Yes the fresh air blend air fan or circuit board is defective. It is a necessary part to operate your furnace in a mobile home that you have.

Damper not opening when heat is called by the t-stat? Check the end switch on the damper for proper allignment.

This damper can be left braced open , and still have safe furnace operation

I put a new Attic fan in , But I don't Knowhow to reset the beeping Alarm?? PLEASE HELP

You have to replace the attic motor wich is on the roof

Does anyone know where to purchase a fan motor?

does anyone know where to purchase a fan motor? Fan for what ac/ ceiling fan/ bath fan / kitchen exhaust/ frig fan ? You get better respond when you start your own post.