My Trane TDE100A9455M2 is flaking out on me. Symptom is that the igniter goes out just a moment before the gas valve opens and fails to ignite. Typically, it ends up cycling until the IFC locks it out and decides to blow cold air around the house.
The company that installed the unit for the previous owner of the home came out and told me the IFC was broken and quoted something like $500 to replace it. "Shenanigans," said I and tried to track down what the IFC really costs. It's a White Rogers 50A55-476, which according to google doesn't exist and it doesn't show up in the white rogers online catalog and trane doesn't seem to have an online parts list either.
So, I finally gave up and got a 50A55-843 off ebay NIB for cheap. When it's installed it powers up, then turns on the blower and reports that the flame sensor has detected flame when non called for. Presumably, while otherwise compatible, the flame sensor installed doesn't work with the 50A55-843.
Should I track down an alternate flame sensor that should work the
50A55-843 or try to track down a 50A55-476? Or am I going in the wrong direction entirely?TIA.
-K