My York 800c affinity gas furnace is not coming on it's 6 months old. I lived in San Antonio. I have program thermostat I set for heat and nothing happen. I hear click on but no heat I wait for hour still no heat. Now my thermostat say temporary what does that mean? I check in attic and gas value is point toward the right. So what do I do please help.

Thanks

Chasmenic

Your best thing to do is call the company that put it in and have them fix it. It is still under warranty as new units are warrented for at least a year and as a homeowner you do not want to start working on it or you will void the factory and dealer warranty.