goodman

Looking for advice. My Goodman GDT090-4B furnace is not operating consistently. Sometimes it will not light and display a single flash error code. Sometimes it will light and run for a minute or two then the flame turns off and it will display a single flash error code. According to the manual...

Hi all, thanks in advance for the input. I live in Poughkeepsie, NY and am looking for some input. I have a 1960 Split Level 1800 square ft house which is getting a complete HVAC system replacement. We have spray foamed the roof deck and the envelope around the garage (6-8" open cell foam)...