Very useful video with simple explanation, have same problem, thank you.

Great Video. Thank you for sharing

Excellent explanation, thanks

I think I just learned something. Tell me if this is correct, please. In my setup, one circulator and 5 zone valves, the relay is built into the triple aquastat. I always wondered why some people have those taco controllers with multiple lights for multiple zones since I don’t have one and it didn’t seem to be necessary.

Thx! I suggest adding "zone" to the title, and fixing "stuck" spelling. Just tryin to get you more views = )