Not much you can do if a motorised valve fails, they aren't necessarily cheap and there's time and labour. Those valves have a manual override (in case the motor fails) but you want to get this fixed properly as it isn't efficient.
I had one of them failing on me after 26 months, the other is now 7 years old and still working (the replacement 5 years and no problem).
If you are still in warranty you might at least get a new valve for free, but probably still have to pay for the labour.
Edit: if you get the same make/model valve it is potentially quicker and easier to replace as it would just be a motor switch, otherwise you'd potentially empty and refill the system.