Zone continuously heats when turned off

[nick]

This is the second time that one of my zones (same zone) has continued to heat when the room temp goes above the Tsat setting, and even when the tsat is set to off.

HVAC tech fixed it first time and said something was stuck.....can anyone help walk me through this so I can save a simple call out?
-only able to add three photos, so I can't show that for the return line two of the top white caps don't have the red dot showing, the two to the far right.

Attachments:

[btwhitehurst]

Are you seeing flow on the flowmeters on the zone when the thermostat is off?
Are there other zones calling for heat?

[nick]

Yes there is flow to the zone that is warm.
There are no other zones calling for heat.

[btwhitehurst]

What thermostat are you using?

[nick]

Honeywell... as an update, I called the tech and he told me to turn the red and blue valves on and off and that seemed to reset things and is working fine now....not sure what that did, and would love to know what the real problem is causing it