Why is my Coleman Evcon furnace putting out heat when air conditioner is on and off?

Is this a electric furnace?

Yes it is.

Then you probably need a new heat sequencer.

http://www.drillspot.com/pimages/63/6339_300.jpg

You can try tapping it with the power off and see if it unsticks. It should be in the top door of your furnace.

Then you probally need a new heat sequencer.

http://www.drillspot.com/pimages/63/6339_300.jpg

you can try tapping it with the power off and see if it unsticks. it should be in the top door of your furnace.

I really don't know what to look for exactly but when I switch the furnace back on in the breaker it glows at the bottom.

That is probably because the heat sequencer is still calling for heat and there is a power load at your breaker

that is probally because the heat sequencer is still calling for heat and there is a power load at your breaker

So can I run the air conditioner?

You can, but it will probably not do much if the heat is also still running.

you can, but it will probally not do much if the heat is also still running.

What if I keep the breaker to the furnace off and the air conditioner on? Will it make a difference then?

Inless you have 2 different systems the ac uses the furnace blower so you will still get no air.