Hi and welcome to Just answer.
Initially, did you able to dispense hot water?
I don't have a water problem.
Did you try to check the solenoid if stuck up? You can manually check the solenoid by giving a quick voltage 5vdc to 12vdc (just 1 quick). If the solenoid is good it possibly you have problem on the cpu board that give signal to solenoid.
Hi may I know what happen to your machine right now? Can you please update me?