Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Help Needed with Zone Valves
I woke this morning with no heat, when checking system I found the boiler is firing when the thermostat is on, but the zone valve is not opening.
I would suspect a faulty motor, but all four valves failing on the same day seems unlikely.
Any suggestions or thoughts on this???