Fresh tank fills regardless if on city water
I am suspecting an over pressure situation has damaged my control valve that selects city water or fill. I have been on city water for over 2 months and suddenly my fresh water tank has filled to the point where it is coming out the over fill pipe on top of the tank. I can drain some water and it is full again after a short while. Anything else I should look at or consider? Also, I have the parts manual but that specific valve is not called out. Is it the same as used for the water heater bypass?
2005 Itasca Suncruiser 37B