We have 2 bathroom on the second floor which is back to back. The 2nd bahroom do not have hot water issue but the shower in the master bedroom lacks hot water beginning recently. Water can run 10-15 minutes and still no hot water. There is an Intermatic control and Warm touch & we never questioned these 2 wall controls when we bought the home. Do I call a plumber? Where is the problem coming from? Thanks
