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Thank you. I'd rather not rig something up where the furnaces AC is literally connected to a two pronged ac to dc wallplug transformer like that one my humidifier uses. I think all I really need to do is put the relay between the power going to the humidifier motor. It seems like the simplest...

I have a furnace from the 80's so no humidifier connector. I have a newer, dc wall-plug transformer powered humidifier. So it basically runs all the time because there's no control. I only want it on when heat is on. There is a humidistat, if the humidity is low it will run, but it doesn't...

sorry for highjacking this thread but it's the most relevant one I can find that is still recent. I'll make it short. I have a furnace from the 80's so no humidifier connector. I have a newer, dc wall-plug transformer powered, humidifier. So it basically runs all the time because there's no...