My A/C fan wouldn't turn on and finally I smelled burning plastic. Without having the slightest idea, I quickly googled it. Determined that it was most likely the transformer I removed from the board (it smelled like the culprit and looked "welded" too). I knew it was 115/24, 2 wires for input and 2 for output. So I rolled the dice and bought this one. Plugged in and plugged into the device (the size isn't the same, but anyone in their right mind can come up with an alternative workaround). Turned on the power in anticipation of a disaster. No, it worked perfectly. All is well. It's heating up again.