Hot water stays on, even when programmer says it's off

[Chester]

Don't know what a V code is, but this is the actuator I replaced.

Sorry I just assumed it was a Honeywell

 

[Chester]

I don't know either. Both valves were closed and the pump was running. The water got (very) hot. That's all I know.

Possibly the HW 2 port is passing, you will feel the pipe warm up after the valve if CH is on. Possibly someone on here has a better idea. Strange. That said I haven't seen the system so it's hard to say tbh without looking at everything.