Main blower mysteriously stopped working on Trand XV80. I've gone through the owner's manual. No fix.

Vent blower works, flames present, no main blower.

16 Months old.

Any suggestions?

Do you have a voltage meter? If you had one would you now how to use it? When the motor is suppose to be running do you hear any humming noise? With the front door off the furnace can you feel of the motor to see if it is extremely hot? Those are some of the things that you need to know to know if it is a motor problem or a relay problem or maybe a loose connection in the wiring? So collect some information and get back to me.