This is the relay in my hot water furnace, on the left side the wires are... top small one runs to my zone valves upstairs The second one run to the furnace as well and the next one below it. the bottom red wire runs to downstairs zone valvas on the right side top run to 2 circulators pumps for the house heating the bottom runs to the circulators to my domestic hot water. problem I'm having is that the power going to my home heating circulators is not getting power. All the others seem to be working fine. Anybody have an idea of why my circulator for the house are not getting power. I have swapped out the relay already so it's not that, thanks for any help that may come my way.

Hi everyone! My old McLain developed a leak from the heat exchanger and I am looking for the best replacement for this model. I would like to find something close if it comes to BTU but more importantly something which would be similar in size and location of supply and return to minimize labor. Hoping someone here maybe went thru this and can share some valuable info and tips. The old boiler is: cg-5-spdn with 140000 BTU Thank you in advance and happy Friday to all!