Please clarify if your old hose's switch at one time was functional and stopped, which caused you to purchase a new hose. Also, please advise if there are two small metal contact points located either on top or bottom of the inside of the inlet valve. These would appear to be small metal dots or nubs, just inside the hole in the wall. If you do have these two contact points, please ensure when you insert the new hose, the tab is either in the 12 o'clock or 6 o'clock position. If the tab is in misalignment, it will render the on/off switch non-functional.