Alright gotta do this before I head out, transformers I mostly know them to do one thing and that's changing voltage. You either have step up or what I've learned them for mostly in HVAC as step down as in changing 240 volts to 24 volts. There's not much you really do to fix them if they aren't working just make sure the wires coming in are actually secured on it and the lines out also. If it ain't working you replace it with an OEM and move on but I done some digging into how they work. As shown in the image you got windings shown primary and secondary and how the voltage change depend on the ratio of windings you got and the voltage coming in. Something something Faradays of induction and you got EMF, look I'm not gonna pretend I fully understand it all yet but I'm trying. I know this component is real important since while the main things in HVAC require 240 volts a lot of safe guards and other components need just 24 volt to get working such as contactors and switches to get the power through. Anyway keep looking out on this mega as I add more through out the week as I try to educate myself on it by reading.

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