I have a Rheem 90 Plus furnace. I heard water running and could not locate where it was coming. Seems it was leaking somewhere in the furnace. The furnace man I called said he doesn't handle Rheem furnaces and told me that I need to call an authorized Rheem Service Repairman. We took out a 20 year rehab loan and I was hoping the furnace would last that long but it doesn't appear like it will according to the feedback I'm finding on this product from various message boards. I'm still trying to find an authorized Rheem Service rep to fix the leaking inside my furnace. Looks like we will be buying a new furnace before the first one is paid off. The furnace is also starting to blow cold air.