I have a Goodman CHPF4860D6AA Heater and its not turning ON. It was working until now. I have checked the fuses outside they are on and the fuse next to the power cord and seems fine. What else can I do?

Go here for troubleshooting guides: http://dl.dropbox.com/u/8010163/Goodman%20Manuals.zip
You will need a meter to check it out; there's no other way.