Appliance Repair Questions? Ask a Technician for Answers ASAP
The CH outlet from the boiler is this pipe getting hot, then the other side of the valve is this hot, then check if the return is warm.
If you know you have got hot water leaving the CH outlet, but not coming via the return it must be a air lock, actuator (which you have already the motor for) or a valve further down the line.
If your not getting heat past the actuator my money is on the actuator not getting a single from the boiler, so its worth manually bypassing it using the leaver at the top and see if that then fixes the issue.
With regard to the HW, when you run the tap does it come out the tap very hot (>50 degrees)?