So I have a 2016 furnace with a E2 error code that has intermittently problems. I changed the pressure switch and it seemed to work for a while but then within 24 hours is doing the same thing, inducer kicks on but no flame. If I reset the pressure switch, blow air into tube starts working again. Thermostat will call for heat but in some cases furnace will not even start. I am at the end of my rope here, I had a tech out and paid for the visit, he came back a second time and while he was here everything was working fine. A few hours later, same issue. GMVC961005CNAA is the furnace, this is a dual stage furnace currently I use a Sensi smart thermostat. I also tried a new thermostat without any luck. What else can I do to fix this issue?