Understanding flame rectification... It starts with an AC signal that is then converted to a DC signal. The flame becomes part of the circuit to help with this process. ***FYI, the lift hadn't moved yet, I was wearing a harness during the work.*** #flamerectification #hvac #flamesignal #hvaceducation #hvacknowledge #hvacsystem #gasfiredheating #hvaclearning #hvacaf #hvactechnician #hvacapprentice | HVAC Know It All