Goodman furnace about 3 years old. Thermostat was bad changed it, now furnace keeps blowing a fuse when we try to get it started. Already checked wires on thermostat everything correct. I pray it's not the mother board as my dad thinks. Any advise?

Which fuse is it blowing? If it is the little 3 or 5 amp fuse on the mother board that means that the problem is in the low voltage system, If it is a breaker in the fuse box that means it is part of the high voltage system.

Check all of your low voltage wires and make sure non of them are stripped and making contact with each other.

Considering that you just replaced a thermostat I have an idea that it is miss wired in some way.

Goodman furnace about 3 years old. Thermostat was bad changed it, now furnace keeps blowing a fuse when we try to get it started. Already checked wires on thermostat everything correct. I pray it's not the mother board as my dad thinks. Any advise?

First mistake: GOODMAN FURNACE. They are usually carried by rinky dink companies, like Park and Sons or Emergency Heating and Repair in Omaha Nebraska. I have a Goodman that is three months old, the thing is not running, and I can't get the guy to come over and honor his product. DO NOT USE GOODMAN OR THIS COMPANY IN OMAHA