Disconnected thermostat 3 months ago reconnected but cold air only now blows. When investigating I noticed the gas was shut off so I turned it on. Unit stiill blows cold only.
Help?

Are you sure you reconnected the tstat correct?
You need to get in front of the furnace when it is being started and tell us what is working and in what order as it tries to start,, before you do, turn off the power at the breaker for a minute and then back on

I need a schematic for a day & night hvac unit. The number is sk-96242, Rev.a