I have a Concord Model RGH80 Furnace. The A/C works just fine but in the heating mode the Combustion blower starts but nothing else happens. Both Diag led's flash. I am not sure if it is fast or slow. Can someone tell me how to trouble shoot the furnace to find the proble?

There should be a sheet or instructions somewhere on your furnace. Might be on the blower door.

I have narrowed the problem down to the combustion blower. The fan blades are rusted and broken. So now I need to replace the blades or the complete assembly. It Is A Concord model RGH80 Furnace.
1. How do I find a part Number?
2. Were is the Best place to check for the part?
3. About how much do you thing It will cost?

Thanks for your help
Robert

Start here. It is a devision of Lennox,

Concord Air Products

Concord Air Products
1-800-448-5872