It wasn't a retorted statement. Sorry, I went overboard. My mother "surprised" me with a visit in to town that week. It put me in a mood. Anyway, being new to HVAC, I have a lot of weak points and relays are at the top of the list. Too many kinds for me to know. Saw another type today (I think a switching relay, used for electric cable ceiling heat). It Looked like a transformer.