Hi I have a baseboard heating system, one if the zone is not working. I have checked the zone valve and that is working so is the thermostats. I do not know what to check next any help would be great.
Thank you for hepling

More info

Is this hot water?

What is the water temp in the boiler?

What is the system pressure?

Where is the problem zone located?

Have you manually opened the zone valve in the troubled zone