I looked at old Snyder-General furnace with White-Rogers 50e47-843 ignition module. Originally I had yellow blinking light on . manual describes this problem as reversed polarity with requirement to reverse secondary wires on transformer.Checked all voltages and reversed wires .Everything was correct ,but yellow light is on. Had someone to replace module and glow coil since it looked pretty burned. Furnace worked for a day then same story happened again. Looks like new module is bad. Everything checks out ok, But looks like module is dead. I wonder if any of you guys had same problem with these modules?