The furnace control board went bad and has been replaced. The new issue... it will not stay burning through a heating cycle: 1. thermostat calls for heat. 2 induced draft blower starts. 3 ignitor activates. 4 audible click, gas introduced with light off... burns for 1-2 seconds(indoor blower begins its cycle) followed by audible click and gas shut off. 5 induced draft blower shuts down. 6 Then the same cycle restarst again.

Drity flame sencer and too much gas pressure will cause this

In addition, there is 24 volts when gas is called for, within 1 second the power is cut and gas flow is interupted.

As Josh mentioned, I would start by cleaning the flame senser