Blower doesn't come on I put it in brand new yesterday. How do I trouble shoot it to know the problem?

In cooling mode you need to make sure you have 24v going to the blower circuit. If you can turn the fan switch to on at the thermostat and the blower comes on you may have a bad thermostat. If no blower remove the thermostat and jumper R to G. If it works then you have a bad thermostat.. If the blower doesn't work you have a bad blower control or broke wire going to the system